I just finished installing this on my 2020 Silverado with a 8L90 trans. The block is horizontal rather than vertical and the lines enter it on the bottom instead of the side. Other than that its the same procedure. 1 hour start to finish and that includes getting the car ramps set, finding the tools, doing the job, and clean up. Total fluid loss was maybe 1/2 oz. The hardest part of the job was getting the snap ring out. Even with a snap ring pliers I had to use a tiny screwdriver to gently pry the ring out of its position. A 13mm ratcheting box wrench worked even better than a 13mm socket, the front driveshaft is slightly in the way but the ratcheting wrench made it an easy in and out for the bolt.
I really enjoyed the way you explained it. Im not auto mechanic inclined at all and its like me discovering gold. I think i can do this. Thank you my friend . God Bless
2021 Silverado 2500hd 6.6L (( NOT Diesel )) 12k miles 6 speed trans running at temp 194 to 204 going 65mph to 95mph TEXAS toll and no trailer. Thank you for showing how u took all the bolts off and everything back on and what tools u used. This is the best video i saw out of all of them. Just finished the job and have not took it out for a spin, but did turn it on for leakages and none so far none. Not much fluid was lost at all, and the Snap Ring I used a KOBALT snap ring pliers from Lowes for 15 dollars and change and use Lucas assembly grease i got from AutoZone 4 dollars and change.
Some kits come with a gasket, you didn't mention it so I assume you didn't buy that kit. I'm gonna buy the one with the gasket. Any torque specs on those nuts or not that important?
I have watch 3 videos on this setup and each one head a different block. Wander which one is older . I was told that the threaded block is the newer one .
Great video and explains the install well. The part sucks imo. I'm glad it was cheap and install only takes like 20 minutes. Ambient temp here is mid 90s. Operating temp of trans yesterday was about 192°, today after install operating temp is.....192°.
Damn god bless RUclips for these RUclips vlogs 🤩🤩😭😭😭 my Chevy trans just overheated last week and it sucks big time but Im also a grease monkey so now time to get a bypass thanks for the video and good work 😎😎👍👍👍👍
Never knew about this transmission thermostat. Great video showing the how to do this repair. What symptom did the truck have to make you think this unit needed repair? Great job. Thanks for the information and videos.
@@slalomking not saying it don’t work just saying if you bought it so it runs cooler all you have to do is remove it and turn it upside down research it don’t take my word for it
GM has a lower temperature thermostat available under TSB#21-NA-199. Why wouldn’t we just do that? The new thermostat opens at 70C (158F) instead of 90C (194F). As i understand it the bypass leaves it open all the time, which keeps the fluid too cold and lowers MPG.
@@wooshkabeeba132 cooler lines are different but the internals are the same. Yes some 6l80s come with clips on the cooler lines and others come with a plate that holds both lines in place.
Hank, I installed the STL010 this weekend and replaced the fluid and trans filter and I'm still running at 195 degrees. on my 2016 yukon XL I think my trans cooler lines need to be flushed. wish I flushed it while I had it all apart. I bought some lube guard transmission cooler cleaner from Amazon and am going to take it apart again and blow the cooler lines out this time. Also I didn't lube the pistons.Maybe I'll try that. Anyway, great video, thanks for posting.
@@gmm4343 yes, 5.3 . Update, whatever was stuck in the cooler must have loosen up, because the temp went down to 136 for short trips and 165 for a one hour trip to Philly last night.😄
@@scottsnell2888 ah ok good. I was going to say if you’re like me and have the 4.3 v6, it’s a different cooling system. We don’t have the auxiliary fin cooler in front of the condenser. The fluid only circulates through the radiator which in turn exchanges heat with the coolant( hot temperatures). Us V6 owners will have to install a cooler if we want temps that low 🥲
@@gmm4343 V6 owner here too. Haven't seen any info on installing a cooler. It's a V6 in this video but the two lines going to the transmission are spaced apart .
Is it better to replace the shift parts? Cause I’ve seen videos about this and people just flip the shift technology parts to opposite ends and it cools transmission temp down. And is this good to do if u drive vehicle a lot?
Hey man, just installed this on my 2019 silverado. It worked great all day yesterday (sitting right around 160). Today i hit 195. No leaks, install was correct, etc. Any idea why this would happen? Thanks
Awesome video, Hank. Question: Did the same thing with great results. I do hear a fluid flowing sound. Is this because the thermostat is fully open? Do you hear the same?
I installed one when I rebuilt my transmission last week. I haven't seen temps over 130 while driving. Seems super low, I did see a 160 after a long steep hill and then I needed to stop shortly after and it crept up to 160 but today I was at 123 degrees all day. Hoping its not too low.
I bought my truck used. In the cold months, my transmission runs 110 in the summer months, and it goes to 140. Everyone I talk to said there is no such thing as running too low of temp in a automatic transmission. Since heat is the down fall of automatic transmission.
@Captain4679 I've noticed that it makes a difference while the truck is moving steadily at certain speed. However, if I'm driving in the city or where traffic is slow it doesn't make any difference
@@Osvaldo-xs2mt In that case, I’d definitely recommend changing the internal filter. The internal filter is usually overlooked in regular maintenance as well as the dealerships usually for some reason almost never recommend changing it in regular maintenance. I took the initiative myself to do it after the dealership declined to do it on my own truck ( 2011 Chevy Suburban 2500 6L90 6Spd) & have dropped temperatures from 190s to 150s during the exact same drive cycle as well as ambient temps I usually do including towing. I’d put it in a list to help drop transmission temperatures in ascending order: 1. Change Internal filter as well as pan fluid only 2. Add the STL010 Bypass Kit 3. Change torque converter ( which you should do regardless 6l80/6l90 every 100,000 miles due to factory manufacturing weakness 4. Add transmission auxiliary cooler or better yet another additional cooling fan or upgrade I’m almost 100% certain this will narrow down in that order finding out what’s causing those high temps as well as increase longevity in those transmissions. I’m not a professional however confident in the methods provided. Best of luck!
I hear that the original thermostat for the tranny fluid cooler doesn't open until 190F or so. Morons at GM must have a thing for burnt up fluid if that's the case.
EPA regulations, forcing Car manufacturers to do magic, so the polar bears live for another 1000 years. Another words, running oils, or keeping it at higher temp, help save gas, oil thinner up, parts runs more freely. I learned it from an GM mechanic. Basically, they care less if we the work force horses have to dished out money prematurely. But they care!🫣🫣
Wouldn’t suggest this mod for the colder climates. I’ve ran this bypass for a year now, and it runs far too cold in winter. Warmest operating temp I’ve seen so far all winter was 26degrees Celsius/or mid 70’s Fahrenheit at running temp. Longer open driving it would always go down to 20 degrees. I will be looking for an alternative for next winter for sure.
@@hanksgarage_ well I’m also not convinced that those are great to keep in either for pulling and hot temps. This bypass works great in summer, winter it ran fine but not sure how good it is for tranny fluid to stay that cold.
@hanksgarage_ do you have any info on this i.l8ve in California I'm curious at what running temp we would start to see a big decrease in function. As far as avg mpg and do we know what the min temp should be for transmission to function properly?
@@pokerstar81 in your area, it’s a no brainer install and enjoy the benefits. Everyone there should be running one of these bypasses. They are definitely transmission savers in the warm climates. You’ll be running at 140 - 150 instead of 200.
@evoxgeo I got it installed about 2 months ago and let me say this, when driving on the highway it’ll keep my temp around 150-160 but once I start driving locally for about an hour or more it goes up to 215 and mind you I just got an new transmission, driveshaft and solenoid installed by the dealer about 6 months ago after my transmission blew at around 48,000 miles and now I currently have 53,000 miles on it.
We bought and installed. It lowered the temperature to 150 over the winter instead of 196F. So far so good!
does the unit make a buzzing noise by chance? i just installed and its making a buzzing noise
I just finished installing this on my 2020 Silverado with a 8L90 trans. The block is horizontal rather than vertical and the lines enter it on the bottom instead of the side. Other than that its the same procedure. 1 hour start to finish and that includes getting the car ramps set, finding the tools, doing the job, and clean up. Total fluid loss was maybe 1/2 oz. The hardest part of the job was getting the snap ring out. Even with a snap ring pliers I had to use a tiny screwdriver to gently pry the ring out of its position. A 13mm ratcheting box wrench worked even better than a 13mm socket, the front driveshaft is slightly in the way but the ratcheting wrench made it an easy in and out for the bolt.
I really enjoyed the way you explained it. Im not auto mechanic inclined at all and its like me discovering gold. I think i can do this. Thank you my friend . God Bless
2021 Silverado 2500hd 6.6L (( NOT Diesel )) 12k miles 6 speed trans running at temp 194 to 204 going 65mph to 95mph TEXAS toll and no trailer.
Thank you for showing how u took all the bolts off and everything back on and what tools u used. This is the best video i saw out of all of them.
Just finished the job and have not took it out for a spin, but did turn it on for leakages and none so far none. Not much fluid was lost at all, and the Snap Ring I used a KOBALT snap ring pliers from Lowes for 15 dollars and change and use Lucas assembly grease i got from AutoZone 4 dollars and change.
Great video, I just ordered the part to do this next weekend. Thank you for filming and posting this.
Nice simple, easy to follow video. Thanks Hank! ( Us Hanks have to stick together!!)
Hank, thanks for making this video. Very complete. I just put my Shift kit in using it.
Great Video brotha , easy and extremely clear. Now hopefully the results add some extended life to my 2016 Silverado tranny.
Some kits come with a gasket, you didn't mention it so I assume you didn't buy that kit. I'm gonna buy the one with the gasket. Any torque specs on those nuts or not that important?
I have watch 3 videos on this setup and each one head a different block. Wander which one is older . I was told that the threaded block is the newer one .
Great video and explains the install well. The part sucks imo. I'm glad it was cheap and install only takes like 20 minutes. Ambient temp here is mid 90s. Operating temp of trans yesterday was about 192°, today after install operating temp is.....192°.
Damn god bless RUclips for these RUclips vlogs 🤩🤩😭😭😭 my Chevy trans just overheated last week and it sucks big time but Im also a grease monkey so now time to get a bypass thanks for the video and good work 😎😎👍👍👍👍
Thanks for taking the time to make this.
top cap is impossible to remove once corroded mine is 2017 hard to remove please be weary of this you’ll be stuck until you get a new valve
Great video, thanks for taking the time to make it.
Great video thanks man. You explain really good 👏👏👏
Never knew about this transmission thermostat. Great video showing the how to do this repair. What symptom did the truck have to make you think this unit needed repair? Great job. Thanks for the information and videos.
No symptom, just higher trans temps than in the past with past transmissions. Heat is the enemy of automatic transmissions.
You didn’t have to replace it all you had to do was remove it and turn it upside down then reinstall it and it will run cooler
@@steverodriguez4871 are you sure about this? This kit works flawlessly, I have it installed on my 19 Yukon XL
@@slalomking not saying it don’t work just saying if you bought it so it runs cooler all you have to do is remove it and turn it upside down research it don’t take my word for it
@@slalomkingsomeone on here mentioned MPG went down noticeably. Is this true ? I mean I already average around 10 in city and 15-16 on highway.
What’s the difference between this and the TransGo kit? The TransGo kit seems to have fewer parts. Does it do the same thing in the end?
Just installed mine, was always hovering around 190 just normal driving, not towing. After installing and an hour of driving my max temp was 140!
Mine is still running same temp weird
thank you for making it look easy
Yeah, it’s honestly not that bad.
What now is your normal transmission operating pressure? Prior to installation 205 degrees, after 136 degrees.
Thank you!! This helped me install today!
Did mine , followed your steps it went front 200 to 180 , 2015 4.3 single cab
Should I still look into a transmission cooler if I install this to prolong my transmission life? Or not much needed?
GM has a lower temperature thermostat available under TSB#21-NA-199. Why wouldn’t we just do that? The new thermostat opens at 70C (158F) instead of 90C (194F). As i understand it the bypass leaves it open all the time, which keeps the fluid too cold and lowers MPG.
The thermostat is not a direct replacement on all years 14 and up, there are different tube/ oring connections unfortunately
I installed it. Just moved to Vegas. Middle of summer. City driving.topping 200F. Highest was 217F. Im gonna put the bypass on.
@@wooshkabeeba132 cooler lines are different but the internals are the same. Yes some 6l80s come with clips on the cooler lines and others come with a plate that holds both lines in place.
Great video, thanks for sharing 👍🏽
Would you recommend putting on new o rings while you have it apart
Always with any seal lol
What is the torque spec on that block bolt ?
Hank, I installed the STL010 this weekend and replaced the fluid and trans filter and I'm still running at 195 degrees. on my 2016 yukon XL I think my trans cooler lines need to be flushed. wish I flushed it while I had it all apart. I bought some lube guard transmission cooler cleaner from Amazon and am going to take it apart again and blow the cooler lines out this time. Also I didn't lube the pistons.Maybe I'll try that. Anyway, great video, thanks for posting.
is that a V8?
@@gmm4343 yes, 5.3 . Update, whatever was stuck in the cooler must have loosen up, because the temp went down to 136 for short trips and 165 for a one hour trip to Philly last night.😄
@@scottsnell2888 ah ok good. I was going to say if you’re like me and have the 4.3 v6, it’s a different cooling system. We don’t have the auxiliary fin cooler in front of the condenser. The fluid only circulates through the radiator which in turn exchanges heat with the coolant( hot temperatures). Us V6 owners will have to install a cooler if we want temps that low 🥲
@@gmm4343 V6 owner here too. Haven't seen any info on installing a cooler. It's a V6 in this video but the two lines going to the transmission are spaced apart .
Changed the thermostat and ran it for awhile. The next day I drove around town and the transmission temp wasn't getting hot like it did before.
Great video.
Thank you sir.
Is it better to replace the shift parts? Cause I’ve seen videos about this and people just flip the shift technology parts to opposite ends and it cools transmission temp down. And is this good to do if u drive vehicle a lot?
Thanks Hank nice video.
And no Pellet to fail and wipe out your unit
Hey man, just installed this on my 2019 silverado. It worked great all day yesterday (sitting right around 160). Today i hit 195. No leaks, install was correct, etc. Any idea why this would happen? Thanks
Did you figure this out?
@thisismyname2936 no, but it never happened again. Temp stays at or below 165. Weird man.
Awesome video, Hank. Question: Did the same thing with great results. I do hear a fluid flowing sound. Is this because the thermostat is fully open? Do you hear the same?
I don’t recall hearing anything
Does this work on a 2013 Ford Edge Sport 3.7L with the 6F50 transmission?
Great vid. Thank you.
Does it affect warranty?
I installed one when I rebuilt my transmission last week. I haven't seen temps over 130 while driving. Seems super low, I did see a 160 after a long steep hill and then I needed to stop shortly after and it crept up to 160 but today I was at 123 degrees all day. Hoping its not too low.
Sounds a bit low for those temp , could be thermostat sensor reading to low maybe needs replace
@@kingadri1180 not sure, it’s always pretty much equal to my ambient temp when I first start off
@@joshmx28 i installled mine this morning and I been driving over 1 hr stayed nomore than 130 as well
We’re at 55 degrees right now
I bought my truck used. In the cold months, my transmission runs 110 in the summer months, and it goes to 140. Everyone I talk to said there is no such thing as running too low of temp in a automatic transmission. Since heat is the down fall of automatic transmission.
@@philzandstra2660correct you are
What kind of lucas assembly do you use? Lucas red n tacky or lucas assembly fluid, grease?
You can actually use either stop slip or oil stabilizer, both are a great assembly fluid.
Is there a kit for 2008 chevy models?
I currently have a 2013 Chevy suburban 5.3l 4wd my temp on a 70 degree day is around 203 and I'm not towing
Any update?
Do you happen to have the torque values for the 10mm and 13mm?
🤣
I am going to do this on my 2019 Tahoe. Do they have one of these for my other 2002 Tahoe?
Hi sorry to bother you. I have 2011 tahoe is there any measure I can take to lower trans fluid temps
@@cowboyninja9811trans cooler
2011s don’t have a bypass valve
Great video. Did you add any fluid?
I don’t remember if I needed to, but I checked it when I was done.
Hello there will this work for a 2020 trail boss ?
What is this for???
Great video! Too bad mine still gets to 195 with this on. Just going to let it blow then ls swap my truck.
They sell a deep pan with a heatsink on it for the transmission but it cost around 350 thats what route im going if it doesnt drop the temp
Do you need to refill the fluid that came out?
No it’ll be fine
What’s your make model year of your truck
I have a v6 so this isn't a option. Wondering if changing the filter will lower the transmission temperature?
This is for the v6 too, This truck was a v6
@@hanksgarage_ the lines go from the radiator to two different spots on the transmission. I look again
I replaced the thermostat and that fixed the problem.
I did it! thanks!
ezpz
Where can I buy the kit?
Amazon
can it be put in a suburban 2021
@@nestorbarboza3654 if you have a 6L80 yes
What if my transmission temperature is 268. With a 65 degree weather
Time for a new transmission 😅
Still hit 192 today but it was 115 out.
Check your radiator for leaves and trash it will affect the cooling thats what the paper says that came with the parts
I'm putting one in. Will the lower Temps affect the dip stick readings on 6L80?
Good question I put back in 1/4 of a quart. Letting it run and drove a couple of miles. Don’t see any on the stick. Afraid to put in too much.
it should still read full, if ur stick is dry you need fluid.@@CSltz
What’s that piece called so I can order it ?
Title of the video
I installed it on a 2020 Silverado 4.3, and made no difference. Temp above 200f .
Add a tru cool 40k transmission cooler
That could be a sign to replace the internal transmission filter. Overtime it gets clogged affecting flow. Very important
@Captain4679 I've noticed that it makes a difference while the truck is moving steadily at certain speed. However, if I'm driving in the city or where traffic is slow it doesn't make any difference
@oalsouqi last time serviced the transmission at valvoline, they didn't change the filter. Thanks
@@Osvaldo-xs2mt In that case, I’d definitely recommend changing the internal filter. The internal filter is usually overlooked in regular maintenance as well as the dealerships usually for some reason almost never recommend changing it in regular maintenance. I took the initiative myself to do it after the dealership declined to do it on my own truck ( 2011 Chevy Suburban 2500 6L90 6Spd) & have dropped temperatures from 190s to 150s during the exact same drive cycle as well as ambient temps I usually do including towing. I’d put it in a list to help drop transmission temperatures in ascending order:
1. Change Internal filter as well as pan fluid only
2. Add the STL010 Bypass Kit
3. Change torque converter ( which you should do regardless 6l80/6l90 every 100,000 miles due to factory manufacturing weakness
4. Add transmission auxiliary cooler or better yet another additional cooling fan or upgrade
I’m almost 100% certain this will narrow down in that order finding out what’s causing those high temps as well as increase longevity in those transmissions. I’m not a professional however confident in the methods provided. Best of luck!
I did it for replaced
But doesn’t improved
Why ?
“
2015 Silverado v6 4.3 “
I hear that the original thermostat for the tranny fluid cooler doesn't open until 190F or so. Morons at GM must have a thing for burnt up fluid if that's the case.
EPA regulations, forcing Car manufacturers to do magic, so the polar bears live for another 1000 years. Another words, running oils, or keeping it at higher temp, help save gas, oil thinner up, parts runs more freely. I learned it from an GM mechanic. Basically, they care less if we the work force horses have to dished out money prematurely. But they care!🫣🫣
Actually it was probably very good money maker, trans $ales !
@@MrLuckylilly yup, fuck GM
194 degrees. Was supposedly to “increase fuel economy” ….. yea while grenading your tranny.
So the front driveshaft has to come out huh
No
Wouldn’t suggest this mod for the colder climates. I’ve ran this bypass for a year now, and it runs far too cold in winter. Warmest operating temp I’ve seen so far all winter was 26degrees Celsius/or mid 70’s Fahrenheit at running temp. Longer open driving it would always go down to 20 degrees. I will be looking for an alternative for next winter for sure.
Good info, may as well just stay with the OEM unit
@@hanksgarage_ well I’m also not convinced that those are great to keep in either for pulling and hot temps. This bypass works great in summer, winter it ran fine but not sure how good it is for tranny fluid to stay that cold.
@hanksgarage_ do you have any info on this i.l8ve in California I'm curious at what running temp we would start to see a big decrease in function. As far as avg mpg and do we know what the min temp should be for transmission to function properly?
@@pokerstar81 in your area, it’s a no brainer install and enjoy the benefits. Everyone there should be running one of these bypasses. They are definitely transmission savers in the warm climates. You’ll be running at 140 - 150 instead of 200.
@@jaybilawchuk2225what do you think about cloaked like Ohio where it can get hot and cold as hell
Anybody do this and still run over 200 temp
Me
Damn. That’s crazy, I just bought mine and still haven’t installed it. So seeing this comment is really fucking with my head 😢
@@moemaisoninstall it. If your transmission isn’t broken. It should work. Heat is transmission enemy.
@evoxgeo I got it installed about 2 months ago and let me say this, when driving on the highway it’ll keep my temp around 150-160 but once I start driving locally for about an hour or more it goes up to 215 and mind you I just got an new transmission, driveshaft and solenoid installed by the dealer about 6 months ago after my transmission blew at around 48,000 miles and now I currently have 53,000 miles on it.
@@moemaison that’s seems crazy odd. I think it should be doing this.
You are the man. Much thanks for the video.