Lube with what

Will this work for a 2015 silverado?

Awesome! Your transmission and torque converter will be very happy.

Yeah, let us know! Wouldn’t hurt to have the cooler flushed . Just to make sure you’re getting good flow. Of all the transmissions we’ve replaced for this issue I’ve only seen 1 require the cooler replaced for no flow. But it’s possible.

@@jaycastillo9313 I’ve replaced the radiator fluid, radiator thermostat, radiator temp sensor, and lower radiator hose recently after buying this truck because the stupid dealership was “kind” enough to drop it off at my doorstep 3 hours away. Long story short when they got to my house there was no coolant due to a leak in the lower hose. Ever since I fixed those things I haven’t had any issues 15k miles. Engine temperatures are still good. AC/Heater works fine. Do you think it’s possible that there’s still lack of coolant flow in the radiator that’s causing my transmission to overheat given all of that information?

Installed and took for a 50 minute test drive. First half of the drive was on the highway 55mph and second half was in city 35-40mph. Still climbed up to 220 but took a lot longer than before. Mechanic claims to have flushed the radiator already. I’ll be picking up a tru cool 40k radiator cooler soon.

they are not related, only thing is they are inside the same case but seperate coolers@@parsingh559

if it still gets hot your cooler is probably plugged, anytime we do converters or trans replacements we flush the cooler@@parsingh559

Odd you are here then

@jaycastillo9313 video popped up in the feed(which is what you want, right?!)...took a brief look, jotted a note.

Until the pill detent fails and ends up inside your transmission yea it works but it’s playing roulette

@zacharycrawfski2276 tje engineering of the part won't allow that

@@everydaydadfixinit4803 seemed pretty poorly manufactured to me in my opinion definitely looks like it could come loose

No problem! Any questions let me know! Be glad to help

@@jaycastillo9313 Yes I like how detail you are in well spoken thank you again

Good to hear! You’ll be happy you went this route. To drain and fill now all you have to do is drop the pan (recommend putting a filter in if you’re already there) and fill through the dipstick tube on the 6L80. Just fill to the cold marker while the truck is running and you can just shift through the gears and re-check. I do not remember if the exhaust has to be lowered on the 6 speed off the top of my head.

@@jaycastillo9313 I'm installing this on my 6L80 today,..saw a video showing if you drop the pan enough to sneak the filter out first, it is easier to remove without yanking on the exhaust

I installed it on mine and made it worse not sure what to do now 😢

@@Pelonskis Worse how? Hotter?

I was able to use a 3/8 Torque wrench with a short extension over the top of the driveshaft no problem. It fit perfectly between the exhaust and drive-shaft. It was his method and a great how to video. But, I agree. The removal of the drive shaft was unnecessary.

The oval gasket number is 23135703 and the two o-rings for the lines are 12650609. The o-rings just got added to the GM parts catalog. They used to only be serviceable by ordering all new lines. Last check parts could not locate any yet. Good luck!

Yep, been putting them on every 6 speed that comes in door. Got 3 in the lot right now that won’t move.

Got an MYD from a 2020 6.6 gas sitting on the bench right now with a snapped output shaft. Good times.

Any chance of getting the GM part # for the lower temp thermostat?

@@bartrowe3705 86774933

@@bartrowe3705 yes,I will look it up..

Yes, after you do this install you’re good to just check it on the dipstick. Top it off and go!

12650609 (aluminum lines) 23277649 (steel lines) 23135703 (Seal)

I can’t say that I have noticed anything like that.

Absolutely not. GM actually recommends all transmission that come in for any type of transmission service and/or complaint the bypass be replaced with the new lower temp bypass. The bypass will have the number 70 stamped into the bottom of it if you wanted to crawl under and check yourself. The STL010 would not void warranty either as no tech is going to pull apart your bypass to see what’s inside.

12650609 (aluminum lines) 23277649 (steel lines)

Awesome, thank you!

I live in Iowa and it’s pretty cold here as well. I personally remote start the truck for a few minutes before I drive it and the trans temp is usually about 20 degrees warmer than ambient temperature when I hop in. And it warms up pretty well but driving immediately brings it back down. I was working it pretty hard today and it stayed about 80 Fahrenheit while driving the about 100 while I’d get out and let it idle while I was working then right back down to 80 when I’d take off again. So to answer your original question yes I definitely still recommend this. Hope this helps!

It seems do-able. Trans Gel would really help in that situation to keep parts from falling back out. Let me know if it works for you.

Ya I have a 23 with the 8 speed and sometimes it slams so hard when I'm coming to a stop I have to do a double take thinking I got rear-ended.

The oval aluminum seal with black gaskets is part number 23135703 and the o-rings are part number 12650609. Hope this helps!

Sorry, you did give the part number in the video GM 23135703 Thanks

I live in the midwest as well. In cold temps the spring and check ball move so the super cold fluid can by pass. The guys at SUPERIOR TRANSMISSION PARTS INC. can explain it better just give them a call and they will answer any questions.

@@stevecampbell7620 I did put in an order on the sure cool.. I did the delete with the mishimoto thermal bypass delete that came with the cooler and went on a long highway drive and my transmission temp never went over 150 at all even after returning to and driving in town temp fluctuate between 127 to 130 some. I also noticed the shifts where smooth but honestly don't know if this is too cold since dealership told me that normal operating temps are at 180. Will be installing the sure cool bypass delete for sure and see what's the difference.

@@viixiconik No the 195 thermostat is to high, The factory designed it that way claiming better fuel economy with hotter fluid. Hotter temps=more stress on the trans. If the thermostat sticks it can wipe out your trans also. BTW I am an old retired GM tech, I did this upgrade on the used 2018 Silverado as soon as I got it .Trans temps easily went to +195 before and never go above 147 on the hottest days. 127 to 130 sounds very good.

@@stevecampbell7620 wow!.. really do appreciate you for clearing that up. I thought 120 some degrees was a little too low since I was used to seeing 180. Thanks again good sir.

@@stevecampbell7620 Gm has a updated thermostat that is supposed to open at 158 i did that but temps were still in 190s so I added a auxiliary trans cooler but temps still hit 190s put my hand on trans line and they were still cold...whats your thought. I just ordered this sure cool..but this is has me stumped I'm thinking bad thermostat

Directly from their website superiortransmission.com/product/superior-stl010/

The thermal bypass is basically a thermostat that opens up at 190 degrees Fahrenheit. Then you get cooler flow. These 6 & 8 speed get too hot. The torque converters can’t handle it and a lot of the time get so hot they turn blue when you pull them out. At this point your replacing the entire unit most shops won’t even touch them. GM actually just released a new bulletin October 19th. 21-NA-199 that tells you to replace the original thermal bypass and updated it with a new one that opens at 158 degrees rather than the original ones that at 190 on the 6 speeds. They list 13 symptoms it may cause. I’m sure 8 speeds will be added soon.

The part number for the GM 158 degree thermal by pass for 6 SPEED only is 86774933 and the seal is 23135703. If you want to go that route.

@@jaycastillo9313 thanks for the info Jay; for 8speed same or different PN? Is this still an issue after changing fluid with the updated Mobil1 blue label full synthetic ATF LV HP?

The bulletin reads that anytime a MYC (6 speed) is in for transmission related service to replace the thermal bypass with the updated version. So it should be done even with a fluid flush. Right now it is only for the 6 speeds. And the part number will not work because the design is different than the 8 speeds. It you can use the STL010 used in the video to completely bypass and when GM releases an updated 8 speed thermal bypass you could always install that if you wanted.

@@jaycastillo9313 thanks for explaining I was confused exactly what bypass was being used for and thought there was another step to the process. Is there any updates being this look like a yr old comment I came across your video by a comment you left on another video about changing the trans fluid because of shudder this part still the recommended way? Thanks cheers

Yes. I believe others have commented that they have done it this way successfully. I personally have never attempted.

@@jaycastillo9313 Thanks for the reply. Great video btw. Also wondering. Have you ever just removed the tstat block completely and attached lines directly to trans.

@@IS-217 I’m not sure there is a way to do that honestly.

si! Y tambien cambie la aciete con el nuevo Mobil 1 synthetic LV ATF HP 124715 y el numero que usa GM 19417577

Gracias

@@jewllake este mismo aceite de móvil también sirve para la 6l80 gracias

@@angelmariojimenez3059 NO..... ese usa el Dextron 6 no el HP. Puede ser Mobil pero de Dexron 6 IV.

@@jewllake gracias muy amable feliz Año Nuevo

@@Jason-ht6ze you have a 6 speed but it’s the part STL010. The process is very similar

There’s always a risk but it’s slim. More risk of a blockage/restriction than a freezup. I live in Iowa and I have driven my truck when the windchill is -55 degrees and all was good. I’ve never personally had an issue. My truck is equipped with an active shutter which may help reduce the chance of a freeze up condition.

Put it on a flat surface and pull the oil check plug like I do at the end of the video. If your temperature on your instrument cluster reads between the spec I gave then pull the plug and wait for the fluid to stop dripping. Then it is completely full. If you don’t get anytime when you pull the plug then yes you need to fill the transmission until it starts to come out of the check plug. Remember the vehicle must be running while you check the level

Pardon the not knowing but why not just check the dip stick? I am going to do this mod whenever the parts come in just ordered after watching your video

@@masonprine9201 His truck with 8L90 Transmission has no dipstick. What he showed on the video is the way to check the trans fluid level on 8L90 transmission.

Take the old seals to a hydraulic shop. They are genius for matching parts like that.

Nope, not at all. Just make sure to check the level when you’re done. On the 6L you will have a dipstick and you use do not use the fluid in the video. You use Dexron VI .

Awesome thank you. I’m hoping this works so I can avoid all the problems I’ve seen about overheats

@@Chris-hk6np I hope so as well. Good luck!

Not off the top of my head. What year and I’ll look it up for you.

@@jaycastillo9313 2019 Yukon. Thank you!

Cooler line bolt is 106 INCH POUNDS and the mounting bolt is 16 LB FT. Hope this helps. Note the cooler line bolt is inch pounds and not foot pounds.

@@jaycastillo9313 Awesome - thank you! Yes absolutely, will be using inch pound torque wrench, 16 foot pounds = 192 inch pounds as well. Thanks again.

Thank you!

yep - pull it apart and check it. Please let us know the results.

please make a 6L80 pan with a drain plug!!

Yes, you should top it off after you finish thing upgrade. The 6 speed has a dipstick while the 8 speed does not.

@@jaycastillo9313 awesome thanks man I’ll grab some before I install this.

Definitely seems odd. I remember summer time temps here in Iowa (not pulling/hauling anything) trans would at max get into the 150~ range in stop and go then drop drastically back down once I’d hit the highway. Ambient temp well above 64 degrees.

@@jaycastillo9313 maybe I’ll try taking it out and making sure I put it in right. Just got a fluid and filter change yesterday so everything should be good otherwise

@@jaycastillo9313 thanks for your reply! I’m not pulling anything either

I think just the pellet (thermostat) inside the housing is the o Lu thing that’s technically updated. So the housing you’re going to buy and the housing you have are probably the exact same. Personally I’d just use the STL010 or the updated thermal bypass. Both just seems like more $$

I’m not sure if the part number is the same on the new body style. But I do know they kept the TBV at 194 on the 8 speeds ONLY even the 10 speeds are at 130 degrees now. Definitely something to look into. If it were mine I’d do some research on their website.

I did it on my 2019 (new gen truck). It fits as long as you have the 8 speed.

There is no waiting for the valve to open. The actual procedure requires you to get to 194 degrees Fahrenheit to open the valve then check it at operating temp of 115. Now the vavle is gone so just get it to 95-115 degrees (GM recommendation) and pull the 10mm plug (8 speed) until the fluid stops running out and torque or get 95-115 and check dipstick (6 speed)

@@jaycastillo9313 you sir are a great man!!!! Thanks so much. Cheers from central Canada!!! 👍👍👍

@@jaybilawchuk2225 🤙🏽🤙🏽make sure the engine is running when you check the transmission fluid. 6 or 8 speed both.

⁠@@jaycastillo9313 yep. That’s how I do it. All good. I had a check engine light with code PO711 for an transmission temp sensor fault happen yesterday, so I’m scared. lol. I cleared it and have been driving and it hasn’t come on again yet but will see. I have no idea what kind of job that would be to change. lol.

@@jaybilawchuk2225 I did it on my 8 speed! It’s just the temp sensor in the transmission. You just drop the pan. I think exhaust has to be loosened on both sides to get on cover clearance. Then replace the harness, the temp sensor is part of the harness and is not serviceable.

Everyone says it works just as good and it’s free! The STL010 will bypass in the event of a freeze up or blockage in the cooler or lines. That’s the advantage going that route. Hope this helps!

@@jaycastillo9313 thanks for that , next fix is a catch can .

I have personally always just put Dexron VI back in them. That’s what GM recommends for the 6L80. Now wether someone like amsoil or Mobil makes something that they would consider an upgrade I’m an not sure on.

@@jaycastillo9313 I am waiting for Superior to get a new shipment.

18 ft lbs

Love to hear that. The vehicles I hate working on the most are my own, I lose money on them!!

@@jaycastillo9313 yeah just do everything he did just kept it bolted to the transmission. Just took alittle hook to get the old spring out. Then put the new stuff in. Very easy

Have definitely never seen this and I have seen a ton of these things! Will post a part number for the entire assembly just in case. Thanks for your input! We’re all just here trying to save a buck and help each other out 🤙🏽

From the Chevrolet parts department at the dealership I work at

8 speed only. Use Dexron 6 for the 6 speeds.

When I look it up on the GM parts computer it doesn’t even show them as a serviceable part. They must come part of the original thermal bypass housing only. Which does us no good in this situation.

Take the old seals to a hydraulic shop. They are genius for matching parts like that.

There are part numbers. GM released an updated thermal bypass that runs cooler. Google the Thermal Bypass Technical Service Bulletin and all the part numbers are on there.

@@kenbrake2828just found it. For those interested the Part #’s are 23277649 (for steel lines) 12650609 (for aluminum lines.

I had previously. So at this stage I just topped off what I had lost.

I just use the factory radiator. I have seen aftermarket coolers that you hook up directly to your factory lines with rubber hoses and clamps. Thought they are not very big I’m sure a stand alone cooler is more efficient.

@@jaycastillo9313 well I ask because my engine temp is always 210. I don't like it that hot. But its ( Air quotes ) normal operating Temp. But it seems now my engine gets the Radiator 210 and that heats up my trans temp now Probably ( I'm guessing ) probably 20 ISH ° , I was just wondering why mine is running hotter than I still like at 160 - 170. BUT Granted that is much better than 200- 210. , but I was just curious if your L80 , is why it's cooler than mine. ( I think mine is the L60 ) I have a Dipstick , so I'm sure its one of the versions. 4X4 , 6 speed. But just trying to Learn all I can about it . Compaired to other Chevrolet And GMC, transmittions, so if anything ever happens to it. I know what I have. 👍💯

BUT today here just east If ST LOUIS, were about 94° outside. Its HOT HOT. , I WILL try the interstate later and see if that cools it down to where I'd like it to be. Around 135- 145. 👍👍

@@Tow_Sr. it was HOT HOT here yesterday too. I’ll be honest we’ve done so many 6 speeds and when we flush the coolers I’d say we average around .6 gallons per minute of flow. On the last 6 speed that was in our shop the tech that flushed the cooler said it flowed at 1.1 gallons per minute. So it got me thinking why that one was so much better (almost double the flow) than all the others we do? We’ve only had one that was so plugged it blew the lines off our flow machine. But also raised the question why GM warranty allows a .5 or .6 gpm flow be acceptable when they can flow up to 1.1 gpm or higher. I need to look back on that one where we replaced the cooler/radiator to see what the flow was.

I guess what I was getting at was maybe the 8 speeds coolers are bigger or have better flow. It’s rare we do 8 speeds (knock on wood) so the cooler flow rates on those are just not in my memory.

If you’re using the stl010 just simply hook the flush machine up inline and it will go. on vehicles that don’t have it deleted we disconnect the lines. Start engine, drain 3 quarts into a bucket. Then fill 3. You do this 4 times. On the fifth time you do 4 quarts. This equals 16 quarts. Then I flush the lines and top off fluid as needed. Obviously a lot harder on an 8 speed v a 6 speed.

And I know that sounds very unprofessional but that’s a actual GM procedure 😂. They even sent dealers a bucket will markings on it. They also send two adapters. One for each transmission (6&8) with hoses attached to each.

@@jaycastillo9313 thanks for response man! I plan on using a little hand pump to do this in my garage so I’ll take any advice I can get 😂

@@nolovenoah742 if you’re doing it at home I suggest getting someone to help you just turn the engine on and off. Makes it a lot easier, don’t want to lose too much fluid. If you do it alone, listen for the pump starting to whine. Turn it off as soon as you hear that and that’s about 3 to 4 quarts. Hope this helps!

@@jaycastillo9313 absolutely helps. I’ll have the old lady with me. It may be a stupid question but of course, after I do the bypass- where will the fluid drain from as I do the flush? Still check plug?

Superior Transmission website has it listed “NOW FOR 2016 & up 8L90” so I’d imagine that it would. Procedure would be slightly different but not much.

@@jaycastillo9313 Thank you. I appreciate it.

Did you learn this through personal experience or did you read about it online? I have the same engine and I just purchased this thing. Don’t tell me it won’t work 😭

@@parsingh559 On any extended trip, it will NOT cool your transmission fluid lower than your radiator temperature with that truck. Without an auxiliary cooler (outside the radiator), the coldest the transmission fluid can get is the radiator temperature, which is about 195F. So if you're looking for something down in the 160F range, it won't do that with that engine. And yes, I observed this because I own the truck that did it. I looked up why and confirmed that with an internet search, it does not have an auxiliary cooler. You can still put it in, and your temps will be lower on short trips as the transmission is warming up, but if you're out for a while, the coolant temp is going to be the bottom limit on transmission fluid temp. To get the full benefit, you have to ADD an auxiliary cooler after the radiator. You can thank GM for cheaping out on this engine.

@@gssmith1986 thanks sir. Have you done anything else to keep it cool? You think regrading the diff will help?

@@gssmith1986 yo what transmission auxiliary cooler did you install? Part numbers would be greatly appreciated. Thanks

You need to take the front grill off the truck and measure the location where it would fit and then pick one of the aftermarket brands. They are dirt cheap and depending on how elaborate you want to get mounting it, pretty easy.@@parsingh559

On the passenger side of the transmission there will be a heat shield with two bolts on it. Remove the heat shield and there will be a black rubber plug facing straight down into the pan. That is the fill hole. It is very tricky to get fluid into. I recommend a pump that screws into the bottle or a siphon to pull from the bottle then pump into . Be careful with the catalytic converter they get hot very fast and the vehicle needs to be running when you top off the fluid. Hope this helps.

Ok. Thank you for such a fast response! Doing that while it’s on sounds interesting haha. Thanks for the help!

Nope. Did them when I bought it. Pushrods where bent as well. Turned off AFM with HP Tuners, haven’t had a problem since.

Yo te puedo mandar el link. No problema mi amigo

superiortransmission.com/product/superior-stl010/ ojala esto te ayude

Muchas gracias Jay

Este me funciona en una Silverado 5.3 v-8 costom 2017 . Gracias y disculpa por robar tu tiempo

@@angelmariojimenez3059 Si, funcionara para la transmisión de 6 y 8 velocidades para ese año

Harder to get the torque wrench in after but definitely doable! Every second helps when it’s your own vehicle though! Not getting paid to work on them, are we? Thanks!!

looks like your a gm tech, me too. 5 years with gm, on my way to WCT

i dont think i ever torqued the thermostat blocks in my life haha SHIP IT@@jaycastillo9313

@@AutoSteps WCT was the goal a few years ago but after being so short on help and a couple kids later it unfortunately became back burner very quickly. Good luck in your pursuit! I have nothing but respect for those who make the cut

@@jaycastillo9313 al hacer el bypass tienes que reprogramar la computadora o se queda igual ??