Turbo 350 Won't Downshift ?

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Pink Caddy Garage

Pink Caddy Garage

Күн бұрын

If your turbo 350 won't downshift, try the adjustments and checks in this video. It is usually a matter of fine-tuning to get the downshift mechanism working properly. Downshift cables vary widely by application, so no links can be provided. Here are some tools and products that will be helpful:
3/8" Drive Socket Set amzn.to/3Fk99yH
Filter Kit (verify fit to your vehicle) amzn.to/3TLVMeK
Synthetic Transmission Fluid amzn.to/3TCVuqH
As an Amazon Associate, Pink Caddy Garage may earn from qualifying purchases. Please use safe practices when working on vehicles or using power tools. Pink Caddy Garage assumes no liability for injuries or property damage as a result of information presented in this video, use at your own risk.

Пікірлер: 67
@edbeck8925
@edbeck8925 2 жыл бұрын
A lots of guys would have turned that into a 45 minute video. Thanks
@kyleecook
@kyleecook Жыл бұрын
Super solid video! This was exactly what I was looking for. Thank you!
@rogjackson
@rogjackson 19 күн бұрын
This is an excellent video. Extremely helpful. Well done Sir.
@kkyler9582
@kkyler9582 Ай бұрын
Thank you so much for making this video. I ended up pulling the tranny pan and sure enough the plunger wasn’t going in all the way. I thought I had the kick down adjusted correctly up top but I didn’t. The Camaro downshifts like a champ now. I’m actually enjoying my new engine and tranny.
@pinkcaddygarage267
@pinkcaddygarage267 Ай бұрын
Glad it worked, it is such a beating when the car won’t downshift correctly.
@naradloff
@naradloff 2 жыл бұрын
Incredibly helpful. Thank you very much.
@darkgreen9098
@darkgreen9098 2 жыл бұрын
Best example I’ve seen thank you
@ryancloutier5086
@ryancloutier5086 2 жыл бұрын
Excellent video and explanation 🤙🏻
@raymondmoreno7442
@raymondmoreno7442 2 жыл бұрын
Thank you for a great video really helpful that's what I'm doing to my car
@peterantonsen3539
@peterantonsen3539 Ай бұрын
Very good video👍. Now i can fix my gearbox😀. Thanks brother👍
@cockasorrus7475
@cockasorrus7475 3 жыл бұрын
Fantastic explanation of the problems associated with the kick down cable!!! The Man! Thank you!
@pinkcaddygarage267
@pinkcaddygarage267 3 жыл бұрын
Thank you sir! Going to tackle the governor next to try to spread those shift points out a bit.
@cockasorrus7475
@cockasorrus7475 3 жыл бұрын
@@pinkcaddygarage267 Although weights and springs on the governor do alter the linearity of the shift point curve, the shift valve springs will have a greater affect. Stock TH350 transmissions have a reputation of running too long in the gears. Many shift kits change the shift valve springs to correct the problem. Transgo kits are one of several examples that I'd recommend. Also depending on how much change you're looking for, the vacuum mod. is usually adjustable. My cars are mostly stock except that black 4x4 with the cage you saw on my channel. That has a badass Hughes Perf, TH400 that will stay in second if you're on the pedal, hence 7 MPG!
@pinkcaddygarage267
@pinkcaddygarage267 3 жыл бұрын
Well, this TH350 like to get into 3rd as quickly as possible and stay there if I let it. If I floor it at say 5mph...it will 1-2 shift at about 25, well below the normal 35-45 mph windout. I thought the governor would be the place to start...you thinking adjustle modulator instead?
@cockasorrus7475
@cockasorrus7475 3 жыл бұрын
@@pinkcaddygarage267 Your diff. may have been changed as to the relation of the gov. in the TH350. You don't want to go too far on the vac. mod. due to line press.. You may have a malfunctioning VM You can test it with a Mighty vac or similar tester. I would do a ie: B&M or Trans Go valve body reprogram kit. I bet you already put the pan back on ..... It may just be a faulty VM? They make some with diff. colored bands for diff. shifts I believe. Orange, Red & Purple are some I remember. CT5015 - A new vacuum modulator for TH350 and TH400 Transmissions, 1965 & up. Push in type, black & red stripe, adjustable. This low vac modulator will give you an earlier (and smoother) shift from first to second, and second to third. It will stop irritating late shift issues in the TH350 and TH400. Includes vacuum tube and very important oring.
@cockasorrus7475
@cockasorrus7475 3 жыл бұрын
I realize you're not looking for earlier shifts. Actually later shifts are indicative of a bad VM! That was just an example of the colors.
@MrFilmScorer
@MrFilmScorer 9 ай бұрын
Thanks! Very informative and concise. I recently dropped the TH350 pan on my '81 Pontiac Trans Am to fix leaks and replace the filter. I found the downshift rod and bracket are gone. An old downshift cable is in it but cut off half way to the carb. This Buick/Olds/Pontiac TH350 is a bit different than a Chevy TH350 but is basically the same downshift mechanism. Will have to source some parts before I can get the downshift to work.
@pinkcaddygarage267
@pinkcaddygarage267 9 ай бұрын
Try rockauto.com
@johnnyturbo8460
@johnnyturbo8460 2 жыл бұрын
Excellent video!
@gatorunleashed275
@gatorunleashed275 2 жыл бұрын
Fantastic video this has helped me so much, thanks for sharing.
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
Glad to help!
@high_meh832
@high_meh832 2 жыл бұрын
Thank you for sharing your knowledge sir
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
I think we’re all learning together!
@lordsauto
@lordsauto 2 жыл бұрын
Best one iv seen
@elcodreamin5280
@elcodreamin5280 3 ай бұрын
Thank you boss
@oralsingletary2897
@oralsingletary2897 Жыл бұрын
very good video..
@camron2674
@camron2674 2 жыл бұрын
I think someone may have modified that cable. From the top up by the carburetor it looks like the cable that comes stock on a 700r4 transmission. That definitely is a TH350 transmission. You got it to downshift so that’s what’s important. I just wanted to point that out.
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
You’re probably right. The truck came stock with a 700 R4 and it was apparently later switched out to a turbo 350 in its life.
@zambino8763
@zambino8763 Жыл бұрын
Question. If the cable is not set properly, is it possible to experience a bog when giving it full throttle from a dead stop? Or would that have nothing to do with it?
@RamblinVan
@RamblinVan Жыл бұрын
This was a huge help in trying to understand the problem I'm having, but it still doesn't solve the issue for me. I bought a new cable that looks like yours from Summit racing. It's for a 76 chevy van. Even the website said it was a direct fit. But, it almost seems like my cable is too long. Even when I adjust it to take as much slack out and keep the cable action as short as possible, the cable never actually engages. At WOT, the arm that the end of the cable is hooked to just barely touches the end of the cable's notched slider piece. I guess my cable is too long?
@pinkcaddygarage267
@pinkcaddygarage267 Жыл бұрын
If I were you, I would look at the brackets that are holding the cable. It’s possible they got swapped out at some point and they are not in the right position.
@robrosenberger7600
@robrosenberger7600 2 жыл бұрын
GM did not change the connection to the transmission. If you were to look a little closer, you will find that the rod from the transmission that connects to the downshift cable is probabbly up inside the cable sheath. this happens alot with aftermarket universal kicksown cables thart arent really the exact lengh as the OEM.
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
Thanks for the clarification!
@avines7566
@avines7566 3 жыл бұрын
What if you kick down a few times then it doesn't want to go back to drive
@mudder9075
@mudder9075 2 жыл бұрын
I need help. My 85 blazer has that same trans and the kick down cable at the bottom where it goes in to the trans the new one kick down cable is to big for the hole in the trans but it’s just like yours
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
I've run into the same issue before. I had to go to a different brand (don't remember which) to get a cable with the correct diameter plastic piece. I guess GM revised the part over the years so you have to keep trying different solutions. For shopping online, see what rockauto.com offers. For local shoppong, I'd try NAPA Auto Parts.
@buckley94thmp
@buckley94thmp 2 жыл бұрын
I adjusted at the carb but still had 1” of travel. Dropped the pan and found that I have the same style cable in new at the trans as you do on your truck. Not sure the best way to adjust that 1” of travel I’m left with…. I pulled it tight and swedged a stop on it but it hasn’t helped much. May have to reach out to the aftermarket for a newer or better cable
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
Are you saying the new cable is too long?
@buckley94thmp
@buckley94thmp 2 жыл бұрын
Sir, kick down cable in my truck is at least 1” too long, this is after I’ve made the adjustments shown in your video. Whether my cable is a replacement or original I can’t say ( a lot can happen in 40 years ) I intend to use a cable stop to take up the last bit of slack
@raydavis9261
@raydavis9261 4 ай бұрын
My plunger gets stuck and want come out once the petal is pushed all the way in . Now i cant get it out otf 1st gear . What a pain
@tynandill926
@tynandill926 Жыл бұрын
What was it that was keeping the cable and s clip from coming out ? I'm having the same issue replacing mine right now, but really don't want to drop the pan...
@pinkcaddygarage267
@pinkcaddygarage267 Жыл бұрын
Ideally, you don’t want the S- clip to come out. The top end of it is connected to the cable and the bottom end of it is connected to a piece of linkage inside the transmission typically.
@Aceman597
@Aceman597 Жыл бұрын
Thanks . My gto keeps down shifting from 3rd to second at 1/3 to half throttle. So annoying.
@pinkcaddygarage267
@pinkcaddygarage267 Жыл бұрын
Don’t most GTO‘s have a turbo 400?
@ChevyC-jo9pw
@ChevyC-jo9pw 2 жыл бұрын
So I have a question and I'm asking whoever I can, my 78 Chevy was towed they disconnected the linkage and I had to replace the ignition because somebody broke it well I put the linkage back in but I don't know if it was already in gear or a neutral I'm not sure where the shifter supposed to be at. The linkage is what I meant and I have a Chilton's that explains but I'm not too sure I've got everything done and disconnected when I started my truck it wanted to take off so I figured that was in gear I don't know how to check if it's in park or neutral or what's going on with it if you can help me out please.
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
I think I would put the shifter in the Park position. Then, get under the car and move the small arm of the driver side of the transmission to where the linkage rod will go in. Secure with whatever kind of clip the factory used.
@ChevyC-jo9pw
@ChevyC-jo9pw 2 жыл бұрын
@@pinkcaddygarage267 just an update I figured out what was wrong with my transmission and the linkage, so I had everything correct except one thing and on the shifting linkage down by the transmission you've got that bar with the spring on it that sits on the driver side frame it goes into the hole after you put it in there you hook your linkage up that wasn't in the hole that was the whole reason why the truck wasn't catching the gears and the shifter was sloppy 🤦‍♂️😝 after that I was able to get all my gears everything seemed just fine I went to put it in gear and it wouldn't drive Well after a long day I figured out through help that it was low on ATF 🤷‍♂️ My truck drives like a champ thank you for all your help
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
Glad you’re on the road again!
@ChevyC-jo9pw
@ChevyC-jo9pw 2 жыл бұрын
@@pinkcaddygarage267 💪 thank God for the web I'm glad everybody works together and helps each other out thanks again
@aguitarhero007
@aguitarhero007 2 жыл бұрын
Can it be setup to downshift with less than full throttle?
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
I believe so. Just adjust a little further in(add tension) and it will downshift earlier.
@aguitarhero007
@aguitarhero007 2 жыл бұрын
@@pinkcaddygarage267 thanks
@caddi70
@caddi70 2 жыл бұрын
In my 70 Impala I swapped the 2 bbl for a Holley 4 bbl and my detent cable is now too short. Haven't figured out what to do yet
@pinkcaddygarage267
@pinkcaddygarage267 2 жыл бұрын
How much too short?
@stanleysmith5808
@stanleysmith5808 2 жыл бұрын
Get a cable from an 80 Malibu. They are about 3" longer at the connector end. I just had the same problem with my 64 impala. Trans came from an 81 cutlass with a 2bbl. The aftermarket ones are built like dogsh!t though. Be prepared to trim plastic. They have a habit of popping out of the bracket that holds them in place.
@michaelcollins1899
@michaelcollins1899 2 жыл бұрын
You can extend it with a kit.
@raydavis9261
@raydavis9261 4 ай бұрын
What's happening when the plunger is weak
@pinkcaddygarage267
@pinkcaddygarage267 4 ай бұрын
Well, I haven’t run into that before, so I’m not sure. You may have to drop the pan and see if anything is unhooked or not moving as it should be.
@wvpatriot1301
@wvpatriot1301 Жыл бұрын
I'm freewheeling going down hill. Will not down shift.
@mikegutzwiller6620
@mikegutzwiller6620 3 жыл бұрын
you are workin g with a 700r4 not a th350 get it right
@pinkcaddygarage267
@pinkcaddygarage267 3 жыл бұрын
It is literally a 3-speed turbo 350 transmission.
@johnnyturbo8460
@johnnyturbo8460 2 жыл бұрын
That WAS a TH350 🤦🏻‍♂️. It's YOU that needs to get it right..
@glockman8091
@glockman8091 Жыл бұрын
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