So you saved me $3,000 dollars my transmission was getting hot advising me to pull over and let transmission cool off because it was to hot I went to my local transmission shop described the issue I was having they advised me my transmission was gone and I could spent as much as i wanted on trying to fix the problem but I would have to replace my transmission I kept driving it trying to make it last as long as I could because I couldn't afford replacing it at this time well it happened my transmission shut down on me and I had to have my truck towed home and left it sitting for a month then I came across your video did exactly what you said and I am now driving my truck around like nothing happened thanks very very much I know I saved 3 grand but you can't have it lol thanks again

Just did mine, about to give it a try. Wish me luck. Update: Travelled south down Hwy 101 through the mountains with about 1200 pounds in the back. Never even got to 160. Love it. Thank you. FYI : 2018 GMC Sierra 1500. 5.3L

Just flipped mine, to extend the life of my new transmission. Went from 190-205 down to the 160s being the highest I've seen so far. Pretty awesome little hack! Thanks!

Excellent video. Focuses on the problem and the fix rather than the presenter and a long boring preamble. Thanks.

I put the Superior Solutions bypass in mine a few months back. I went from 194ish to 130-150. The truck shifts a lot better too. It was very easy, and I had the two bolt configuration, took all of 15 minutes to swap it out. Great video!

I have a 2019 suburban and I decided to try this mod, and it sure as hell works. I went from about 195-215 all the way down to 150's.

Aye I heard NWA! Bella Vista/Bentonville native here ✌️

Also from NWA but have since moved. Your channel has been great! I’ve got a 2015 Sierra and always watch your videos when I need to do something and you’ve taught me a lot about my truck. Not a mechanic by any means but I’ve gained some confidence since watching

I did this last night after seeing this. I've had my transmission replaced at 90k (warranty thankfully) I've always wondered why these trucks run so hot for no reason. This diy was an absolute nightmare for me! I knew what I was getting into when I saw the corrosion (northeast) Still I went ahead. I left a heat gun on the c clip for 40 min and it popped out with some rubber mallet encouragement. Was still worth it. Went from 200-205 average temp to transmission 140 engine 195. The seal near the C clip kept leaking. Had to Uninstall and install 3 to 4 times. I eventually put a large o ring on and slammed the piece in with a rubber mallet. Its now a time capsule. Worth every minute. If you have corrosion be ready and have a new seal/oring ready and some sandpaper. Thanks for the content. I should have done this sooner. These trucks are great minus all the weird issues.

Question on the order of parts going back in…it looks like the top came out after removing the snap ring, then you had the pill, then the spring. When you put everything back you put the pill in opposite of the way it came out, and then the spring, even though the spring was on the bottom. Just making sure the spring should go from being at the bottom to being on top of the pill going back in. Thanks for your videos man, they have all been a huge help for me doing work on my truck. Keep it up brother!

A thorough Fluid change and flushings HELPS the high temp issues. Make sure you put the right amount of fluids to prevent the slippage, hard shifting issues. when I say the right amount, i mean the right amount. Measuring and remeasuring after you put in the fluids. DIYers are notorious in making task quicker Just because you put in 6liters doesnt mean you dont check with your dipstick. These trucks are fucking sensitive. And when checking fluid levels, eye balling is never recommended. Make sure truck is at level position. Run the engine until your at HOT range temp recommendation 150-190 degrees. Shift to all gears, R, D, L1 back to Park. And now, check your dipstick. Fluid marks should be on the “hot” markings. No more, no less.

Just did the pill flip and I went from 195F around town to the lowest of 144 F after the same 30 to 40 minute drive . The trans was warm from a recent trip to town this morning so when I started the road test out it was at 163F and dropped from there to 144 F huge improvement. Transmission service is next just because and I also have no idea when the service was last done . The dealer changed the oil and checked everything else out but didn’t mention a trans service.

I am really glad I found your video I am going to try this because my truck is a 2018 thank you very much I appreciate the knowledge and the how to.

I never understood why people spend money on the superior solutions kit when you can do this mod for free and get literally the same exact results. For the people who think that the hotter temps help with mpg’s, I have a 2.5” leveling kit and 33s and managed 21.7 mpg over a 400 mile average while the transmission ran at about 125 degrees the whole time. Shifts like butter too. GM never put thermostats on these transmissions before (this is literally a carryover trans from the last gen, just with the thermostat installed) and had FAR less failures on them. I don’t think it’s a coincidence.

I bought the Superior solutions as well, I am hitting about 160 on a good day !

Just went through the fluttering torque converter/coolant valve issue here in Alaska. They get that hot.

Man you are really nice man...put please be clean and easy..u are like a viking fixing his 🪓

I did this mod 1,000 miles ago.used to run at 194.since I've done this mod I haven't seen over 138 so far.truck is a 2016 and has 74,000 miles on it and wanted to prolong the life of the trans as much as possible.also changed the trans fluid and filter and added a drain plug to the trans pan.gonna change the fluid pretty regular.

I changed mine too because I pull a 34 ft camper, and it works great temp now is 134 -138

Free is the best price!! Bitchin mod!! Great video!!

This is great thanks for sharing. I'm in the pocono mountains of Pennsylvania 17 Silverado 50k I've noticed some hard shifts at slow speeds. I just figured out how to monitor the fluid temp.🤦‍♂️ Forty degree day today I'll have to keep an eye on the temperature. 190+ is too much

This applies to 2021 Silverado 6 Speed transmission A must do

I did the trans thermostat by superior solutions part #STL010 and it works.Drops your temps by 40 -60 degrees.

Should also clean all the dirt off before you remove snap ring. Then Also after you remove cage.

Man I'm in the NWA too! I got my truck like a month ago and I'm trying to do my best to keep it in good condition

Bad idea. It beats the hell out of the bottom of the thermostat housing. And you can install the small e clips back onto the housing before you put the lines back in. The lines will click right in.

Awesome video man. My truck overheated the tranny a few times in the hot summer and then not for a while as its much cooler now that its winter...last night the stupid truck went into limp mode and i could only drive in reverse...i let it idle and got abkut 3 miles in distance over 3 hours and wastkng gas and engine life doing what the stupid system says to...the dumb computer didnt even recognIze the fans that were struggling to start spinning. They would try to turn but wouldnt. Then turn once quick and shut off. idling the engine like the dic said was the wrong thing to do.

Doing this today! Also here in NWA!

Very interesting, i didn't know this. Great video. Cheers

Why "flip the pill" when you can replace it? GM issued a TSB for this: 21-NA-199 and part #86774933 new thermostat opens at 158 degrees, useful in all climates. Part is $50.

Add a derale remote filter inline with it in place of the thernostat

Did this to my 2015. Now never gets over 150 on the highway. Dead easy to do. Don't know why anyone would ever buy a bypass kit. Just flip the pill.

im definitely going to have tk try this on my 2018 Silverado

I had the Superior Solutions bypass put in mine and it worked for a few weeks. Now after a 65 mile drive home from work it has risen to 201 degrees.

Keep up the good work!

love ur videos man!!!!

Hope you're looking at your comments Dustin. Slid under my 2016 GMC Sierra 2500HD this afternoon to see what I had to do to complete this swap out. What I found was not the block like you and others show, but a much smaller block that looks to have no thermostat in it. It looks to me to just be a plate holding the lines in. Have you seen or heard of anyone having that? Wish I could post a pic.

To late for me. Mine failed and that cost me $6,200. Thermostat got stuck closed. No warning lights or temp warnings. However, the electric fan did come on. I thought that was a stuck fan relay. Didn't notice I had a transmission problem until it gave me symptoms. Was 200 miles from home. It got back home, but it was fried. That was an unnecessary failure.

Its because the wires to the break controller under the carpet. Unwind the wires that are twisted together. You may have to do all or 1. As the wires are put together frome the factory, they get little cuts from the machine that makes them. So the wires start touching. After I did that took the pressure off the breaks. Better mpg less break problems. And the frunt stopped dipping in the front going down the road. Look at other trucks and cars and you will see them do it.

I don't know my transmission runs 110 degrees on my 1994 Silverado 350 4L60E...never had a problem with heat...just takes a long time for overdrive to kick in due too cool of transmission and fluid barely expanding

Since I live in texas where it’s 80 degrees in December and only winter for 3 months ima have to do this mid respectfully.

Should be changing that gasket

Hopefully I did this in time.. constantly runs at 190 ... just took it for a test run down the hwy and she topped out at 165!!!!

I just did mine the old school way and ran a trans cooler in the front I think it’s a 30 core and my trans stays at 145 all the time delete the thermostat all together. I also have a thermostat on the cool for a trans fan cool it’s a 165 degree and it has never came on even after drag racing it stays at 145

I bought the sure cool w/active bypass,for my 18 1500

Did your motor start running hotter? According to my calculations the heat has to go somewhere. I’m pretty sure the coolant is not being controlled properly now. I would rather do a transmission cooler, it’s like $200.00 and give your trans it’s own radiator.

Couldn't you just remove the valve completely and connect the tubes together with high heat hose and hose clamps and achieve the same result?

I just bought a 2014 GMC Sierra 5.3l V8 and I’m certain this hasn’t been done. I only have 105k miles on this truck but thinking I should do this. Do you recommend ordering a new thermostat or flipping this one? If replacing, which part do you recommend replace it with? Thank you.

I did flip the valve for the fluid thermostat and dropped down the temperature dramatically. From 360 Fahrenheit to 176-196

Hey. First off, thanks for these informative videos. So one week ago my wife and I bought an 18 Sierra SLT with 33,000. It’s a one owner vehicle in great shape. I took out a 100k warranty. Due to major back issues, I can no longer turn a wrench. So if I wanted this done, where would I take it? Also, any idea of this voiding the warranty? Finally, I was told to change the fluid (drop pan, no flush) at 40,000. Does that make sense? TIA

Why not take the thermostat out completely? Thank you for the video

Took me 10 mins to change mine 2017 8l90 it was running 160 degrees now it’s like 111 no higher than 120

Just flipped mine when I put a new trans in I went from 180 to 115

Did the GMC trans mod replacement swap out for $70.00 .. Went from 190*+ to 150*ish .. From what I have come to understand trans fluid runs best at 175* ... Be aware that a total by-pass will not work well for your truck in cooler temps and people make lots of claims just to sound important ... Do your research !

Did this and my transmission went out lol but it wasn’t from this my torque converter took a shit and the components from the torque converter clogged the filter from the transmission and now it only has first and second gear

Any cold weather issues with this mod?? Live in upstate NY and have lots of teens to twenty degrees weather….

Wait so does that make the transmission cooler or does it simply fool the thermostat into thinking that it is cooler?

I’m doing the same thing with my 2014 with stl010

My 6l80 still doesn’t run cool enough. I did the bypass and mine still runs around 150-160 average. My other truck with the 6l80 runs 130 on average

Theres no almost kinda click it needs to 90 percent of connections will give off a confirmation click

Man screw these trucks! I got a 14 ain’t even paid off now I gotta get rid of my truck! Moving onto dodge now!

Just did mine at 67k. Shoulda done it at 45 when i first bought it. Did i wait too long? Didn't have quick connect links had a cover locking plate with a screw

2015 6.2 LTZ 4X4 , I'm going to try this also I have a question. My truck started making the classic u joint sound. I replaced all u joints (they were all good ) went ahead and replaced them anyway. It's still making the noise. It speeds up and slowes down with speed of the truck. Could my front axle joint do that , they seem tight. Any ideas would be helpful. Like your trans temp mod , it's on my list soon as I figure out the current problem. Thanks. Subbed.👍👍🏁🏁

When my snap rings are that close ill tap it on with a socket around the diagmeter

Thank u good job

How do you like your transmission? Well cooked

No problems with my truck

Where is the red pill indidnt even see a blue pill funky matrix is glitching again

i wonder if this would work here in canada on our winter days?

I have a 2018 Chevy Silverado 5.3L 6 speed. Will this work on my truck

Ive got a 2014 1500 silverado 5.3 6 speed its been running at 194 degrees has annyone tried this yet on this specific model? Kinda skeptical on if this actually works

What about the updated thermostat that opens at 165?

My 2013 transmission temp is 190-ish. Is there a fix for the 6L80s in the 2013? TIA

Said your transmission. Needs serviced. No it needed to cool down. It needs to be engineered and tested properly. You dont build a rifle and not test it numerous times just in case it might blow up in someones face. That limp mode bs almost got me hit by a bunch of vehicles speeding toward my flashing 4 lights. The dum fs are sooo dumb that they still drive right up behind you and sit there for 5 minutes until you tell them how low their i q is.... damn highway 7 is full of accident prone drivers and 5 lane crossovers. Now gmc should be replacing all of these stupid valves for everyone.

Any idea why my temps is still the same after I installed this?

did u had to refill fluid? have a 8l90 and will have to pump the fluid in

I have a 2012 silverado with a 6l80 transmission, will this work for it?

How do you know how hot the Trans is? I gave a 2017 slt sierra.

where can i buy this part, please order bearings

I so much want to buy a used 2017 sierrae or silverado, but with crappy trans and grenading lifters and cams, I guess Toyota for me.

Does this affect trans fluid flow at all?

mine is leaking everywhere afterwards and i cannot find the problem and help ?

When you flip that tstat what holds the pin in or keep the pin from falling out and ending up in the system ?

I live in western NY and have a 2014 Silverado 1500 LTZ, 5.3, with 94,000 miles. Our temperatures range from -20's in winter to triple digits in summer. I can see my trans temp on the DIC, but have absolutely no idea what a safe maximum operating temp is. Can someone help me out, please?

After doing this mod do you have a best way to put on those clips, I’m having a hard time putting them on.

My 2019 suburban is currently at 260... the high temp light came on today... wil this mod help me?

Can this be applied to 2018 Chevrolet Suburban? If yes, why did you flip the order of things? Thanks

What should the temp be on a 2013 Z71 4x4 ?

I wish you showed it working

That fluid looks dirty.

Never going to buy another Chevy or GM product ever again! They don't stand behind their products

So how does the sensor lower the heat?

Bad idea don't do it

Why not just leave everything out of the housing and let it free flow?