I’m a GM trans tech and part of the issue with TCC failure is that the TCC pressure valve solenoid is PWM controlled by the TCM. It’s not an on/off switch. So when you get degraded fluid the PID parameters that control the PWM out put of the solenoid can easily lose control of the TCC. Drain and fill normally fixes it if caught early enough.

A little more than 30,000 miles ago I put in Lubegard Platinum ATF protectant (a shudder fix). With fresh fluid and it's been perfect since. I mean perfect. No strange incidents since.

Solid video Ivan. I appreciate your insight and enjoy the diagnosis.

17 Colorado with the 8 speed, total and utter junk. Even after 2 fluid changes and eventually a torque converter replacement by the dealer for this well known problem, they said it was fine but it was not. It would clank and bang gear changes, random lack of drive when cool at first junction of the day (scary) and had a super annoying slight slippage/lock/slip/lock cruising on the highway. I dumped it at 45k and bought a Highlander with 220k in great condition and absolutely everything still works perfectly.

super video, thank you! this is exactly the problem I've been trying to diagnose. I'm headed to get the atf fluid now and try this. Thank you for your detail.

Ivan, My procedure is to get the trans up to operating temp and pull the Cooler line at the trans. Using a length of Hose Adapter pipe, and a bucket I exchange all the Trans Fluid. 2 Qts out; Stop and add 2qts. I did my wife's Traverse and also used 1 pint of BG trans additive after the process was finished. That ensures all that crap fluid is gone. 10-11 qts. to accomplish. And much better results I find than a D&F.

I think you're one of the best KZfaqrs there is. Your patience with shooting the shots and narration is fantastic. I'm retired but I learn a little every time watching your videos. I had no idea what one could do with diagnostic technology that you use as well as you do. Thanks! Ed

We put the shudder stuff in every one we have come in the shop for a shudder. Works great. The converter clutch doesn't ever lock up solid so it wears constantly. It is pulsed applied too.

I love these diag videos. Great advice and sound wisdom

No lie Ivan, just flushed and replaced tranny filter and fluids on my X5 today. You have taught me well master! 😂😂😂😂

I own 2 GM products so i change mine often. Transmission fluid is often overlooked but so very important. I do a spill and fill on both my vehicles every 20K miles. It's cheap insurance for your Transmission. And super easy to do.

Thanks for the video Ivan.

instant shudder fixx worked great for me on an infinity qx80. I couldn't believe 2 0z. of this stuff and 4 qts of fresh trans fluid worked. Factory updated calibration did nothing. Many cars use PWM to control the tcc lockup to make it shift smooth. On my GMC Yukon I can program it with HP Turners to extend converter life.

The infamous shared GM and Ford transmission! Fresh fluid and lube guard shrudder fix should do it. Dex 6 or Maxlife synthetic will do the trick.

Nice video Ivan. Just an FYI... On my 2013 Traverse I flushed out at the trans cooler return and filled at the same time until spilling red fresh fluid. Only used about 3 gallons but well worth the effort. Videos out there somewhere I learned from. Use clear vinyl hose.

Great diagnostics and certainly not an issue prone to GM only.

Always enjoy your vids, just to help others... this was not a fluid flush and fill, it was a drain and fill, which leaves a large amount of oil in the system. When the oil is drained and looks as contaminated as it did in the vid, a flush and fill will give you the best chance of removing the contaminants (and change transmission oil filter if poss). A flush and fill is far more tricky (easier with 2 people) where you remove one of the transmission cooler lines and effectively "pump" the remaining dirty oil out of the system by keeping the transmission topped up with fresh fluid (hence easier with two people). So drain and fill to correct level, remove correct cooler line, I usually start the engine, pump a couple of litres out in to a measuring jug, stop the engine, refill 2 litres and continue to pump fluid out cooler hose until you get clean transmission fluid. Make sure you have plenty of fluid for the flush. Yes, if you do many drain and fills you will "dilute" the contaminants in the old oil, probably OK on a transmission that has regular oil changes and is working correctly, but on problematic transmission give yourself the best chance by doing a flush and fill.

The six speed was a joint venture between Ford and GM. The early versions had serious problems like broken wavy plates and bad torque converters. A serious design flaw was the internal non replacement filter. Tells you the expectation was about 100k miles before failure.

20 years ago, a drunk driver totalled our car (Volvo, no injuries), we needed a replacement fast. We had three kids so a minivan was an acceptable option. Went to look at a 90s Chrysler minivan. Everything checked out. The owner said "Look, I'll be right up front with you, the transmission shudders and bucks. My mechanic said it'll need a new transmission, and I don't want to mess with it, I'd rather sell. But of course I'll take that cost off the sale price." I looked it up on the internet and read that you had to use the specific 7176 Chrysler fluid in that transmission. I told the guy and he was like, well, maybe, but I think you'll need a transmission anyway. So I bought it at his discounted price. I bought the 7176 fluid and a filter, drained the old fluid out, put the correct fluid in. On the test drive it still shuddered, at first. But then it just started working, I guess the fluid had to flush through. It shifted like buttah from then on. The dipstick said use 7176 OR Dexron-4. I'm pretty sure I drained out dexron-r4 - it sure worked better with 7176. So I stuck with it.

I worked at a trans shop for 10 years, to prove it was a TCC friction material issue, we would add half a bottle of motorcraft friction modifier (stinky stuff) let the vehicle run for about 10 minutes and go drive within about 3 tcc engagements if it's lining related it will go away and sometimes it actually I'll go away for quite a longtime. But this is mostly used for diagnostic purposes but we did have a silverado that decided not to replace converter and came back 3 years later with no reverse but said tcc was still working good. Also these traverses had a tcm flash that would keep the converter from locking up in lower gears to keep it from chucking and lugging down the engine at slow speeds. But was only to be used as a customer concern not as a standard to do to all that used that 6 spd trans. The idea for using PWM tcc control is to make the application of the clutch soft, like a soft shift, I agree full engagement all at once would prolong clutch lining life, and most truck applications, especially the 4l60e and 4l80e we'd block off the pwm tcc valve in the valve body so when the main on- off tcc solenoid came on it would apply the tcc fully all at once and it basically eliminated an tcc lining warranty issues long term, they used a pwm solenoid and just an on off solenoid togther on those transmissions

Many miles away from home, I blew a transmission line on the highway. The shop who repaired the lines topped-off the transmission fluid. Shortly after I got a shutter when ascending an uphill grade. I changed the fluid and added some Lubegard 19610 Instant Shudder Fixx, 2 oz. And it never shuttered again.

I worked at 2 GMC Dealerships as a Line tech and PDI specialist. I saw more than a few of these low on fluid from the factory.

I had a similiar problem with a 2006 Honda CRV with 200k miles. Changing fluids x 3 helped but not completely. As a Hail Mary, I added a product which promised to help/cure. The product is Lubegard 19610 Instant Shudder Fixx, 2 oz. Unbelievably, it worked and the fix lasted 20k miles. When some slight shudder returned I repeated the Lubegard. Still working 30k later. Honestly, I was shocked.

Thanks Ivan!

I sure wish there was someone like you who understand this stuff and can figure out what is actually wrong with a vehicle rather than just throwing parts at it and hope it fixes it....

Hey after hearing about the shaking from you and the comments here I wanted to share what I found out. As an owner of a 2017 Cadillac CTS 2.0 turbo I got with 88k km on it, I noticed the same shaking when I drove it between 50 - 60 mph or 75 - 80 km going upwill on cruise control. After a lot of discussion around the issue I found out it to be called a “torque shudder”. I found out it’s common will these cars that don’t get transmission flushes done on them on time. In fact this cars transmission wasn’t changed at all! The fix for this torque shudder is to pour roughly 10 litres of trans fluid through it as a super flush. It cost around $1300 but it was recommended by GM. Once it got done the problem completely went away forever. Never had the issue come up. In fact I got it done on my second 2016 Cadillac CTS 3.6 as well as that car also had that shuddering. (Though not as bad ). If you need a mechanic from gm to talk to I can hook you up.

We used to run into this all the time with 2010-2018 acura's. A fluid flush fixed 95% of them. A few did require torque converter replacements. Its probably the same crummy manufacturer for the torque converters

You can put a red tube of lubeguard shudder fix. It does work wonders. Lol. But at least customer got rid of it lol. Nice video Ivan!

Shuddering can basically be cured by adding Lubegard Instant Shudder Fixx. If it's a torque converter clutch problem, it'll probably cure it. Add a second tube if needed. I do recommend changing to whatever the latest recommended fluid is first (might just be good Dexron VI). Remember that torque converters have been PWM for 20+ years and most of them are designed to actually slip during engagement. If it locks up and holds manually that is a good sign and my recommendation will probably work.

Nice video. I would drain fluid one more time and flush cooler and lines. There’s a product called Dr Shudder fix and it seems to help. I did a Transmission on my old Crown Vic and it helped. Paul has a video where he used it on one of his brother’s customer car and it seemed to work too.

I have an Enclave with that trans. Even when the fluid on the stick looks OK what comes out is showing deteriorzation. I dumped mine around 65K and will do it again next oil change. Some folks recommend doing a drain and fill, driving to heat up trans and doing it again when it looks like yours did

great advice.

I've had good results adding Lucas Transmission fix after a spill and fill.

I Just one a day had some input you might be able to purge that torque converter fresh fluid Intero the filler that and bleed on some out of the transmission fluid through cooler line well it's running really like your program keep up the good

I’ve used STP stop shudder it’s a very tiny bottle and made to stop chatter and shudder and torque converter shudder. And worked in my 2010 Hyundai sonata and my 05 cavalier. And my last 2013 Honda fit had a torque converter shudder between 3rd and 4th gear on slight hill incline almost like it was gear searching. But wouldn’t shudder if I pressed gas a tiny bit harder. Unfortunately it says on bottle don’t use in FORDs or CVTs But it works instantly

Lubeguard shift shield/shudder fix or Ford Motorcraft limited slip XL3 friction modifier. Works on all transmissions. Was once a Ford field fix for TCC shudder/rumble strips light throttle. Makes the clutches/ATF run cooler too.

10/10 as always

I had a similar issue with Chrysler 62TE. Nice shudder post fluid change. I tried another change and it helped for a bit. But ultimately, it was the torque converter failure that was turning the fluid brown. Ultimately the fix was a Gary Ferraro transmission rebuild. Literally went all the way to Hempstead to get it from him. 2 hours drive

Best shop signage around

Just did that on the 'ol Marquis; drained the torque converter and changed the filter. I can assure you of one thing, Ivan, you are NOT changing that transmission. The last transmission I remember you changed was on a RWD Lexus. GREAT VIDEO!

Ford friction modifier works great in my fusion six speed to smooth it out and i change the fluid every year, 230,000 miles so far and it's still good.

Trans-medic shutter fix usually works for me used it 80 thousand miles ago with fluid change and still no problem.

We use to put differential limited slip additive in the Dodge and Chrysler trans for torque converter shudder

I use HP tuners to mod tcm to allow lockup in 5th/6th only. You can increase TCC pressure slightly to provide a more secure engagement. Lastly, as others have said, Lubegard Shudder Fix works well too.

I fixed a friends 4l80 with a tcc P0741 code. New valve in the valve body and new TCC solenoid. That got the torque converter clutch working again, and it shuttered like no other🙃. I put 2 bottles of Lubeguard tranny shutter fix and it mostly took care of that. Alternative is $. Told my friend live with it or have the trans rebuilt. He was also complaining of some occasional shift quality issues. Those fwd 6 speed GM's, same. 1 bottle of shutter stopper. If it still does it, add another.

I had that in my old transmission in my 2006 Avalanche. It was torque converter flutter. Added a bottle of this conditioner designed for that issue and it went away. Transmission lasted another 3 years without that symptom returning. Of course the tranmy blew up later anyway. Had to put three in that truck. $$$

Love your channel. Long time fan. Wondering why you only ever do one drain and fill on a trans with bad neglected fluid??? It needs 3 spill and fills to change most of it out. At least two with a bit of driving in between…

I learned from ammco that they use trans x posi rear additive and i have used it several times with success. My friend just used it in a 4l80e that was shuddering when hot. After 2 tubes the suddler is 100% gone. I think this is the same as lube guard and many others but the posi additive is much cheaper.

My old Chevy Trailblazer had recurring transmission issues, and the dealer did the repair each time. By the 3rd failure, I had enough (the torque converter lockup was disengaging and re-engaging at highway speeds with very LOUD 'BANGs). I went to an 'olde tyme' transmission place, and bought a re-manufactured transmission from Jasper. No further issues. However, I later found out that there was a SB out on this very fault (Water intrusion in the ATF via the dipstick tube) and the dealer never followed the corrective remedy.

It’s the torque converter solenoid not locking up. You have to take the valve body out and inspect the lower part of it along with a shift kit. There was a TSB for 2013 that addresses this too I believe.

I've replaced many torque converters in 6T70E transmissions for this exact concern for TCC clutch material degradation.

I have a sealed for life automatic transmission in my diesel LR3. I bought it second hand a few years ago. The seller was a Rover specialist. They replaced not only routine maintenance items but also known fail points including parts that did not require replacing then and there, but are known to fail. Ie plastic water pipe “Y” in the valley, timing belt, HP fuel pump belt, tensioners, front & rear crank seals, front, rear, transfer case AND gearbox fluids. I am a firm believer of there being no such thing as a lifetime fluid. If there was such a fluid it certainly would not be in an Automatic box that has friction material wearing through every gear change as well as in the lock-up torque converter. If anything a manual gear box would have better chance surviving till the vehicle goes to the scrapyard. Having said that, I would not leave any fluid that long. For me, 80,000km (50,000 miles) would be as long as I would let an automatic gearbox fluid go. I myself will be having the filter replaced and a fluid flush undertaken, not a spill and fill. A much cheaper option than a gearbox replacement. That will be the last one I do in my ownership of the LR3. It will be sold well before a third one is due during my ownership. I have worked with oils albeit HV insulating oils and I can tell you, no oil lasts forever, and those oils have for less stress placed on them than lubricating oils, and they do degrade; all oils do! Diff oils turn black due to wear, mostly heat related just as automatic gearbox fluids fail. BTW, as a Rover owner, I am keen on you doing a video on the Rover you have in for repair. Please do one and post it Ivan.

When I bought my Ram in 2017 (Model 2014) I asked the service counter about transmission fluid change interval. I already knew what they were going to say but I wanted to see their answer. Without hesitation she said, "They are filled for life." I asked, "Is that the life of the truck, the transmission, my life, or just until it dies on the side of the road?". She shrugged her shoulders and smiled. They know it is BS but that is the line they are given to tell by the manufacture. I changed it out at about 85k. I tow enough that it needs a fresh change. Speaking of which the other vic needs a change soon.

I have a 2015 Rav4. The 2013-2014 models had such TC shudder problems that Toyota voluntarily supplemented the warranty. The fix is a new TC, extra magnets in the pan and an updated transmission control module program. (the update reduced the TC lockup at low gears -which caused premature wear) My 2015 was not covered by the warranty even though it had the same problem. At the first signs of shudder i followed a transmission repair technician's advice. Change the fluid and add Shudder Fix. I drained and filled 4 times, added the shudder fix and the issue disappeared overnight. Time will tell how long it lasts.

My 2017 Ridgeline has a problem with this. Changing the fluids in the trans does fix it. Honda claims it is the guild is getting overheated. They want you to dump and fill three times and they should fix it till the next fluid change. I just dump my fluid at every oil change and the problem hasn’t come back.

TCC shudder seems to be quite a common issue with many modern automatics, getting fresh fluid in them before the shudder gets too bad tends to help but it's usually not a permanent fix. I think alot of the problem is most of them never fully lock the converter clutch, most seem to target around a 30-50 RPM slip even when the converter clutch is "locked" so there is always wear taking place on the converter clutch disk(s), couple that with there not being much material on the clutch to begin with and you have premature failures.

With a tuning software (e.g. Hptuners) the tcc programming tables can be modified to an on/off operation, eliminating the gradual pwm based engagement. It can correct these symptoms sometimes for the lifetime of the car.

Yep, they are lasting less and less! Good job, Ivan and very wise decision by customer. Another point in favor of stick shift 🙂

The valve bodies are able to be removed they have plastic like disk in them u can change out fairly easily it should help pretty sure they are warn out..had to do them on my 07 acadia

❤🎉😊 great job brother

Friend had a similar issue we had to drain and fill 3 times before the fluid looked good after some driving. Then it was fine. Its nonsense that there is no serviceable filter. They could have just put an oil filter type filter externally on the design.

I change fluid in my Rogue CVT every 20kmi. Now has 120kmi on it. Fingers crossed.

Yes, change your fluid and filter every 50 to 60,0000 miles!! My family and I have had many 300,000 mile GMs only 3 of them have had transmissions after 180,000 miles. We keep the fluids changed and abuse the vehicles!! My 2001 ZR2 with a 4L60 had 252,000 miles on it when I sold it.. lots of towing and off roading and not one problem with the 4l60... I changed the fluid and filter 4 times...

Please more AT videos. More explai how it works etc. About TCC slip etc. In europe dont have information how to diagnose AT and DSG Thank you!

Ivan, torque converter clutch will come apart in these the trans runs hot at 225 - 240 cooks the the Dexron 6 fluid quickly, needs a new updated tc.

I had the same issue at 30k (8 speed) so they changed the torque convertor under warranty...then at 60k started again...so I put transX in and drove for 3k until next oil change then changed the fluid added more transX...big difference, so I did another fluid change next oil change added transX...better yet, went 10k changed the fluid again added transX...now have 450k with fluid changes every 75k. I also tow with this and use Valvoline....(those who know use valvoline)

Ivan, I really want to learn how to do this well myself. I purchased a Thinktool Pro and a 2 channel Pico scope, but learning how to use them is not "plug and play", for me. Do you have any recommendations on some online training? I'm searching youtube and watching videos, of course, but it's kind of hit or miss. I was curious what you'd recommend. Thanks, and awesome channel!

I install a Magnafine transmission filter inline in the cooler line. I don't like the non serviceable filter on some transmissions. Easier to keep the fluid clean.

you're my favorite I always enjoy and learn alot from you may Allah bless you

I had the EXACT same symptoms on a 17 Acadia. After reading about all the issues with this transmission, i dumped it for an Odyssey.

when you change fluid put in a tube of that dr shudder additive, it has always worked for me......

GM has had a crap ton of problems with transmissions from around 2014 up to 2017-2019. Mostly with the 6L80 and 6L90's. Starts out as a Torque converter problem similar to what you had here and ends up a completely ruined transmission when the converter lets go. The fins inside the torque converter overheat, shatter and sends the fragments throughout the transmission. Working at a GM dealer parts department where I live, we were/are selling anywhere from 60-75 remans a month! One dealer...60-75 transmissions a month. At times GM can't keep up with the rebuilds to supply the demand. GM also says "there's no problems with the transmissions". Really? The running joke when someone comes in to buy parts for a vehicle with a suspected bad Tranny is "better save up for a transmission, cause it's going to need one before 100,000"! The typical way to fix or head off problems before they start is to replace the Torque converter with a good quality Billet converter. The whole thing is sad that GM won't fully take responsibility for engineering screw ups. I believe someone has finally started a class action lawsuit regarding the problems with the transmissions.

I'm having weird issues with the transmission in my new car. 2017 cruze that has the 6t40 trans. It has problems shifting, shuddering like the engine is heaving misfiring on acceleration. Sometimes it slips and slams 3rd gear on a soft shift. The TCM notices too much slip between shift and applies high pressure to slam the clutch. This issue has been known to break the transmission case by slamming the assembly against the lock ring and it breaks pieces out of the case. Not DTC's stored, but I don't expect the engine light to come on until it completely breaks and leaves me on the side of the road. It is also one of those cars that the dealer did a 107 point inspection on and put "no dipstick" on check and fill transmission fluid and told me the full service was done on it, which I doubt. This trans is easy to do a fluid change by the drain plug and there is a fill plug by the axle shaft. Kinda like filling up a diff. Luckily it still drives ok and gets great gas mileage but hopefully it breaks before the warranty is out.

I have a 2008 GMC Acadia with very similar shutter. A Chevy dealership diagnosed it to be a failing trans. They did nothing more than test drive it and check for codes and fluid level. They did not offer a fluid change or anything else. A local "Honest" Transmision shop never saw the vehicle but discussed the history and issues I was having and recommended Lube Guard additive for the issue. He said otherwise it would likely be a complete rebuild. He had like 3 cases of the stuff in his parts room. Says he needs to use it on many of the modern transmissions to get them to perform properly. I used the lube guard additive as recommended and 75% of the shutter went away. The rest of the shutter went away after I replaced the spark plugs as it was due. Shutter is gone!! The trans had been replaced before I bought the car and at that time it was shifting normally. It had about 60k on it when the shutter started and I changed the trans oil, which did not help. I am a retired firetruck mechanic with Allison experience and couldn't not keep myself from removing the valve body. Solenoids are unservicabel. valve body is very pricey. I cleaned it like an Allison and put it back together. No change. That is when I used the Lube Guard atf protectant. Not a mechanic in a can kind of guy, but it fixed my trans shutter. Have had no issues for 50k. Time to service the trans again! Great channel. Being retired I miss diagnosing firetrucks. I was pretty good at it due to the very competent training from corporate vendors.

I'm back because I just recently started feeling the shudder in my traverse (2016 FWD 148,000 miles). I was regularly changing the fluid at about 40k miles using FRAM Dexron VI. I'm gonna switch to Mobil 1 Synthetic LV ATF Dexron HP and add the shudder fixx to top it off. I hate to pay for 9.5 quarts of Mobil 1 but its better than buying a new torque converter or transmission. If you happen to see this and see that anything I just said I maybe shouldn't do, yell at me LOL.

My 2016 Chevy Colorado had same problem, 75K mile transmission service with flush, fill and filter fixed problem. Truch does not have a dipstick to check or add fluid.

Late model 6T70e (Gen II) the TCC lining delaminates at about 100k. Done tons of them put a new TC and ship it. The 8L90 and all its variants had bad fluid from the factory that’s why they want you to flush it.

3:30 My own rule about automatic transmission is to replace filter and fluid at 50.000 km (30.000 miles). So far, never had any issues with transmissions, regardless of the vehicle I had at the time...

We were fighting this in 1986 with the Mitsubishi torque converters. Fluid changes were the answer to help relieve the shock of the lock up feature of the torque converter. With todays transmissions, would recommend fluid changes every 45k miles. These newer transmissions are generating too much heat that destroys the fluid.

Lubegard Shudder Fixx, works well if it's just a light shudder or slightly slipping.

I have a similar issue with my 2015 Impala. They say that this is a common issue with this particular transmission. However, my previous car was a 2012 Impala with the same transmission, and in the 8 years I had that car I never had this issue. I was considering trying to get it fixed, but between the high costs and time I'd be without my car, it'd probably be more trouble than what it's worth, especially since it really is a minor annoyance as you said.

Back in my day we had transmission filters you could replace, we just chose not to.

Brown fluid always means burnt clutches usually caused by low pressure for some reason. the trans will fail in the future

Put a couple bottles of Lubegard in it.

Haven’t watched the video yet. Just had this issue on my in laws nearly new 18 Traverse. Chevy has a TSB. First change fluid with the additive and then change torque converter. Torque converter fixed the problem. They only had 10,000 miles. Dealer said they shudder off the lot. 🤷‍♂️🤪

Dr Shudder Fix to the rescue! Approved by ScannerDanner

While you were showing your scanner with the graphs, does it tell you what the values should be. ? So you can compare.

Awesome video Ivan. What did she when she got rid of it? I hope not another chevy.

Pull off a cooler line and pour 12 quarts through it while running.

I own a 09 tahoe with the 6l80 255k miles. Started having issue on the highway in 6th gear with he converter locking and unlocking rapidly like this traverase. A few months later the converter let go on a road trip and wiped the fluid pump and clutches. (I knew better but kept driving it.) I would say do the converter now on this one based on the rapid locking and unlocking. I would say this is more than a shudder. Had a customer with a cadillac cts 8 speed with a bad shudder. Perfoemed fluid service with new fluid and problem went away completely. The new fluid was the mobil 1 hp fluid in the service bulletin. Ford 6r80 is bad for this too

We were told my wife's 2013 Chevy Sonic had a failing transmission. Shifting hard, some sudden acceleration at low speeds and sudden loss of acceleration, all randomly. I noticed the problem always happened after braking or cornering. I examined the brake pedal thinking maybe it sometimes does not retract completely. I installed a spring I happened to have to put upward pressure on the brake pedal. I disconnected negative on battery to reset the brake pedal sensor. I will be getting the brakes redone, but after a week of driving the problem seems to have gone away.

On some colorados and 2nd gen traverses people have used dexron HP which they said helped with the shudder. There is no statement saying dexron 6 and dexron are compatible tho. Plus some Lube Gard

Customer made a wise decision. My 2020 Civic with a CVT, Honda says every 25,000. It's like a 4 qt spill and fill.

Hi Ivan, as others have mentioned, put a tube or 2 of Dr Trannys Instant Shudder Fix, and it will be fixed, stupid PWM controlled TCC, have had the same sh!t with my BMW and My Tahoe, the additive fixed both instantly, actually a product that works as stated 🙂

Input and output speed sensors. If either had a drop out,, it would kick the torque converter out, even if not caught by the computer, would it not?

Ivan, I use to deal with Chrysler A604 transaxle transmissions a lot. I used the OTC monitor 4000 scan tool. You could check the CVI (clutch volume index). It would give you a good indication of the clutch wear. My question to you is this readout on the newer cars today possible with the Think tool scanner? Sure would be helpful in a situation like this.

Do a complete drain and refill your transmission fluid and then add in the lubeguard instant transmission shudder fix in. That will fix the shudder issue.

After performing trans flush,add two bottles of motorcraft xl3 friction modifier .

Probably was in the TCM, known for bad seals for the solenoids and cause similar problems Sonnax makes a kit for less than $40 and it repairs the problem

My fathers Chevy travesty . Had a transmission rebuilt with all the updates and sonax parts yet still is wonky occasionally. Even the repair shop told him to sell it before it dies again. He’s getting a lexus next vehicle