6T40 Rebuild

2013 Chevy Cruz
PATREON: / curmudgeontransmission
Supplier Links:
Superior: superiortransmission.com/
Transtar: www.transtar1.com/
WIT: www.wittrans.com/
Sonnax: www.sonnax.com/
Teckpak/Fitzall: www.teckpak-fitzall.com/
Transgo: transgo.com/
Precision of New Hampton: gopnh.com/
Atec Transtool: www.toolsource.com/atec-trans...

[@garycubbage1272]

Special thanks for showing your video on 6T40 what a massive help you have shown. most apreciated now to fit and check out how it works. Regards Gary

[@CurmudgeonTransmission]

Glad to help, thanks for watching.

[@pyrozman2912]

Great video and very thorough. I am in the process of repairing the 3-5-R wave plate that broke in my daughters 2010 malibu. I am opting for a new drum with all the parts installed to aleviate any issues in the future and this will help tremendously for reassembly. Thanks!

[@CurmudgeonTransmission]

Thanks for watching!

[@shawnreese2784]

It’s always good to see someone who knows exactly what they are doing. I specialize in engines but am currently working on a 6T40 that the sun shell swelled up on. Not sure why it did that just yet.

[@CurmudgeonTransmission]

Thanks. What exactly do you mean by swelled up? You got a picture or a video you can post on your page?

[@shawnreese2784]

@@CurmudgeonTransmission basically the rear sun shell seems to have stretched out. The 3-5 clutch splines are loose inside the shell and the clutches on the outside of the shell are stuck.

[@shawnreese2784]

@@CurmudgeonTransmission I just posted a video of the Sun Shell. And thank you for taking it to reply to me. I really appreciate it.

[@janpalmer3025]

thanks so much, you let me know it is a problem .. now I will try to fix the 6T40, you made it look easy, awesome videos.

[@CurmudgeonTransmission]

Thanks. I was not saying that it is a problem. If it is the sprag noise, that is the noise they make. Also if it is the sprag, it will only do it in one direction. When it freewheels it clicks, the other direction it locks. The 3-5-R Cushion plate is also bad about breaking. It's a possibility that could be your noise. It does a tremendous amount of damage when it does.

[@lolonghauler]

Hey mate, that is bloody awesome! Thank you so much for putting this video up, it has made my rebuild so easy and save me a lot of issues. Once again thank you

[@CurmudgeonTransmission]

Glad it helped. Thanks for watching.

[@lolonghauler]

Hey mate, I’m wondering if I can pick your brain for a moment. I’m not a transmission worker at all and I’m a bit lost here. The reason I pulled my transmission out was I lost all forward gears, I still had reverse but no forward motion. I googled the issue and I watched some KZbin videos and the suggestion was that it possibly was the valves(solenoids )in the transmission. I pulled those out first and tested them with ohms and power operation and everything seem to check out fine, but not under pressure.When I did drain the oil it was very black smelly and some little pieces of possible fibre. So straightaway I guessed the clutches were no good.. So I rebuilt it and a few of the clutches were no good. I stripped everything down and re-built it and drained the torque converter and flushed as much as the rubbish out as I could. Then reassembled. When I put the transmission back in the car it still won’t go forward. It has excellent reverse and it wants to go forward, when it is cold it will push itself very gently. needless to say I’m rather stressed as I need to get this thing going. My question is do you know what it possibly could be? Should I change the valve solenoids in the transmission, the seven pieces or do you think it might be something else. I replaced everything but I did not replace the Pistons. I replace the seals O-rings and everything else though.All the steels were in vg condition and nothing was broken or damaged. Any advice would be greatly appreciated.😕

[@CurmudgeonTransmission]

You have a couple of options here. First thing to do is pull the valve body off and air check the drums. If they air check good you probably have a bad techm. The part that contains the computer and solenoids. It will need to be programmed after installation. To air check the drums. The 2 rubber tubes that were installed under the valve body in the case. Top one is Low/Reverse, bottom is the 1-2-3-4. The 1-2-3-4 is probably where your problem is as you still have reverse. They are bad about blowing out. As you are looking into the case, far right. There are passages that look like they lead outside. Top one is 4-5-6, next down is 2-6 and the next is 3-5-R. If any check bad and the unit needs to come back out I suggest you replace all the pistons. Also did you replace the 3-5-R cushion plate? If not and it needs to come out replace it also.

[@lolonghauler]

@@CurmudgeonTransmission thank you so much for this. I will let you know how it goes!! Thanks again.

[@lolonghauler]

Thanks for that, I did just pull the sump cover back off. The two channels that go behind the plate in the middle of that with the rubber tubes,they both check okay and are operating normally. I put air into the side passages as you suggested the top one doesn’t do anything just blows out elsewhere the second one operates normally and I can hear a Clutch or a piston engaging. The other two underneath that don’t do anything. When you say replace the Pistons. Do you mean the seals that go on the bottom mount where those air channels go to,inside the drum? Because I did replace them when I pulled the transmission down. Obviously they’re not seated right or not engaging properly though. Do you reckon they could be my issue or still need to replace the techm? I did forget to mention that when I lost all forward gears in the leading up to that i.e. the 45 minutes or so before they failed it would not go above fourth gear. So I could only use 1234 and the transmission would not engage five or six. Thanks Brother..

[@natedillard7353]

Man theres some huge pump gears right there ... Good job !!

[@CurmudgeonTransmission]

Thanks.

[@andresolmostito3409]

Thanks for the video , it helped me a lot rebuilding one !!

[@CurmudgeonTransmission]

Glad it helped

[@inspectorjavert5563]

great job man. very interesting process.

[@CurmudgeonTransmission]

Thanks

[@MachineGunner29]

I got a 2012 cheve cruze 1.8 with 130,000 miles on it. I have owned it since 50,000 miles and so far it hasn’t really been too bad of a car. Maintenance is all up to date. Just changed the transmission fluid and it smelled alittle burnt and sure looked it. The tranny is shifting kinda funny from 1st to 2nd and 2nd to 3rd. I’ve been considering getting it rebuilt.

[@CurmudgeonTransmission]

I would before it gets too bad. These can go from not much damage to catastrophic in a very short time. I'm glad you have had good success with yours. I have the same year and it has been nothing but trouble. One of the worst cars I have ever owned. As soon as I can I will be getting rid of it.

[@MachineGunner29]

⁠​⁠@@CurmudgeonTransmissionyou know that’s what I heard that these cars have been nothing but issues. So far the car hasn’t given me any real major issues besides the transmission shifting poorly. Other then that it’s been honestly more reliable then I would’ve ever thought. A few small annoying issues I see with the car throughout my years of having it , the valve cover gasket keeps leaking so I bought a new valve cover. Maybe the old one was warped. Also the car always seems to be needed it’s overflow tank to be topped off with coolant every few months. I never see puddles on the ground or smell like coolant is being burned. That’s pretty much it. I did replace the usual components that cause coolant leaks and such but have no clue where the coolant is going. That’s why I’m considering rebuilding the transmission because other then that , the car has been fairly good to me. What’s the average mileage you’ve seen with these 6T40’s lasting out of curiosity ? I been changing the fluid every 30k miles since I’ve owned the car.

[@CurmudgeonTransmission]

@@MachineGunner29 Somewhere around the 100k mark.

[@privatedata665]

Great video

[@CurmudgeonTransmission]

Thanks!

[@1TumuToa]

Thanks for the Video.

[@CurmudgeonTransmission]

Thanks for watching.

[@JohnVHLife]

Thats amazing... But you dont soak the fiber clutch plates at all??? Im working on a 6t45 equinox

[@CurmudgeonTransmission]

I get that alot. No I don't, Every builder I know does not do it either. Not near as critical as everyone likes to make it. I will do it on a racing transmission and it is a carry out but other than that no.

[@brandoncornell6715]

What assembly grease are you using? Thanks for providing us with a build video.

[@CurmudgeonTransmission]

Gold is transgel, green is Dr. Tranny. Thanks for watching.

[@josespindola9549]

Great video thanks

[@CurmudgeonTransmission]

Thanks

[@sniperclasic2133]

Very nice and nice vedio very clear

[@CurmudgeonTransmission]

Thanks

[@TheKhwailed]

My car is a Daewoo Lacetti Premier 2009 (a Chevy Cruze with the Daewoo logo). I want to install an extra automatic transmission fluid cooler, but I want to know which of the ATF cooling lines entering the radiator is the inlet? There are two lines attached to the radiator. So which one is with the fluid leaving the transmission and entering the radiator? Is it the bottom one “as usual” or the top? Because all I know is that the inlet is the lower line in order to push the air out of the radiator. My car's transmission type is 6T40. Please help me with this.

[@WhosYoDaddyYoMamma]

Thanks for the video! Awesome, quick watch! I'm definitely a new subscriber! ..I'm just going to change the filter and outer seals on a salvage yard transmission.. I'm trying to get the torque converter bell housing off, I have all of the bolts out but am I correct, I think there's some kind of clip or something holding it on, down in the hole around the input shaft.. If so, how do I get it to release? Am I seeing two flat spots that need pushed in? Also, when I put the housing back on, will whatever torque my Craftsman Impact Driver puts on it, be close enough to proper torque, or should I check it.. if so, what torque? ..I think I read somewhere 89 Ft.Lbs. then a 45 to 50 degree turn? I'm planning on using liquid gasket maker for the housing.. and smearing liquid gasket on the existing oil pan gasket.. On a tight budget, and need this thing going! ..Thanks for your help!!

[@WhosYoDaddyYoMamma]

I found it.. the dowels get stuck.. but thank you!

[@CurmudgeonTransmission]

89 in. lbs + 50 degrees. It has a molded gasket for the case, so if you don't replace it, put a thin bead of silicone on each side of it. Don't leave it off or your end clearance will be off.

[@ruve304]

Hi, since 6F35 and 6T40 are pretty similar, so does the trans fluid right ? Do you think we could use GM ATF VI in the 6F35 ? Or we should stick to the Ford Mercon LV ?

[@CurmudgeonTransmission]

I am not sure. Always safe to follow recommendations. Having said that we are using a full synthetic and they have been working fine.

[@kayasp19]

ŞİİR GİBİ ŞANZIMANI DİZDİN GÖRDÜĞÜM EN İYİ USTA

[@CurmudgeonTransmission]

Thanks

[@faitkeeper]

What brand rebuild kit did you go with? Trying to decide which one to order for mine

[@CurmudgeonTransmission]

Transtec, and I believe this one had Exedy Clutches. I prefer Raybestos or Borg Warner clutches but that is what I got.

[@Topshottayut]

What’s that tool called that you hammer the bushings in with the interchangeable parts

[@CurmudgeonTransmission]

Bushing driver. www.toolsource.com/bushing-tools-c-1321_119_581/bushing-driver-set-solid-steel-19pc-p-92045.html?tsqtid=63701

[@samifoaz3640]

יפה כל הכבוד לך מצוין תודה רבה

[@CurmudgeonTransmission]

Thank You.

[@RC_BASSBOY]

Can a 6T40 gen 2 transmission be programed where a 6T40 gen 1 was originally ?

[@nobodymporta]

I need this... is there ..something ..that can be done .. for 6 inch rims ...for longer life and to make speed show on dash ...?? 2016 impala LTZ

[@user-zi9ez7ys8u]

Great work . But where do you get the part ...

[@CurmudgeonTransmission]

WIT or Transtar. Links are in the description.

[@tonyromo4489]

After watching this video I'm going to attempt a rebuild on a 6T50 and all the overhall kits list the same kits for 6T40-6T50 is the only difference that the 6T50 has a 1/4 wider chain? Any help is appreciated.

[@CurmudgeonTransmission]

I have not had a 6T50 in the shop yet, and only a handful of the 6T40's. Which is weird because we get a ton of the 6F35's.The internals will be set up the same. The difference is going to be in hard parts. The planets I would think would be heavier duty. Different sprocket tooth counts which would probably make for a different chain. Differential, sun gear and ring gear probably. The rest I would think would be the same. So pay close attention if replacing any of those parts.

[@tonyromo4489]

Thank you for the information and quick reply!!! @@CurmudgeonTransmission

[@AdamBrunson]

See anyway to improve to handle more torque? States they’re capable of 277lbs-ft but need it to hold about 500.

[@CurmudgeonTransmission]

None that I am aware of.

[@maciejgawronski7751]

Should the pistons be replaced with every repair?

[@CurmudgeonTransmission]

It is recommended.

[@TheMuskyMafia]

Do you know why my 6t40 1.5t malibu has a weird second to third and third to 4th shift? The 2-3 has a weird delay unlike the ones that shift fine. I just financed this car then it started doing this soon after. 94k miles. I need it rebuilt im afraid. How much will u do this rebuild for 😂?

[@CurmudgeonTransmission]

Most states you have 30 days to take it back. Try to make them pay for it or get out of the deal if you can. I have a Cruz which has the same transmission. Worst car I have ever owned, worse than the Hyundai Elantra I had. Will be going bye-bye as soon as I can make it happen. The 3-5-R cushion plate always breaks and causes a ton of damage. Even though it is basically the same as the 6F35 that Ford uses,they always seem to be in worse shape as far as damage goes. Every one I have had come in has been so damaged that it was cheaper to get one from Chevy. Mine included. Mine went out about a year ago. They will give you a 3 year 100,000 mile warranty. Was right around 5K for parts and labor.

[@tomaszszary3253]

Witam można tą skrzynie troche nadlać olejem ponad śrube kontrolną ??

[@CurmudgeonTransmission]

Google translate has not made it very clear what you are asking but I think you are asking about putting fluid on the pump gears. You can if you want to, not a bad idea.

[@terrymeierotto4545]

How do i contact curmudgeon for my 6t40 rebuild?

[@maxrenaldi1941]

Where did you get your ls kit?

[@CurmudgeonTransmission]

We get our parts from WIT or Transtar.

[@Terry1212]

What is considered a fair OTD price for a 6T40 rebuild?

[@CurmudgeonTransmission]

Probably high 3's to mid 4,000. Depending on the damage.

[@user-pw7pn5mo5c]

​@@CurmudgeonTransmission если перевсти в рубли... То я не плохо съэкономлю 🤣🤣🤣

[@janpalmer3025]

thanks for the advice, I hav'nt pull it apart yet, if the 3 - 5 - R cushion plate was bad, would I have driving trouble.

[@CurmudgeonTransmission]

When it first cracks, maybe not. After a piece breaks off, yes.

[@janpalmer3025]

Jan Palmer 2 hours ago I drove for 200 miles, since I heard the oily clicking sound, clicking sound when rolling forward just 12 inches, engine off, but the 2010 chevy drove good, no shudder, no eratic shifting, no slipping, no limp mode, or check engine light, should be alright, thanks for the advice.

[@Zzzz-nl3hx]

What is the tightening torque on pump bolts 11:50 ?

[@CurmudgeonTransmission]

106 in. lbs.

[@Zzzz-nl3hx]

@@CurmudgeonTransmission Thanks 👍

[@Zzzz-nl3hx]

One more question, on the video 20:10 there when you grease with brush around the edge where piston sits , on my 6t30 that edge is bit shaved on the top due to wave plate destruction under input drum , Do you believe that I have to replace whole rear case or it can be used again? I’ve ordered input drum pack and master rebuild kit. Basically input drum is damaged and that case edge on the bottom is slightly shaved on the top, all other parts survived.

[@CurmudgeonTransmission]

That is going to be a judgement call. When that plate breaks it does tend to ruin the case. If you think it may be bad it probably is. It may work for a short time, but now is the time if you have doubts. Awful lot of work to go back when you are right there.

[@Zzzz-nl3hx]

@@CurmudgeonTransmission 👍

[@denizdeniz7114]

Merhaba Gm 6t40 ısındığı zaman bazen 1.vitesde kayma yapıyor 2.vites vurma şeklinde geçiyor bunu neden yapar? Teşekkürler.

[@CurmudgeonTransmission]

If it has never been rebuilt it is time before a lot of damage occurs. If it is after a rebuild I would be looking at the valve body or Techm.

[@denizdeniz7114]

@@CurmudgeonTransmission thank you. Could the 1-2-3-4 piston be cracked?

[@denizdeniz7114]

Techm selonaid valve team new.

[@CurmudgeonTransmission]

Never seen one crack but it may have been damaged when installing it.

[@holagarcia969]

Fain

[@janpalmer3025]

In neutral, engine off, I roll the car 12 inches, and my 6T40 clicks, like a greasy, click, sound, loud enough, to hear from inside the chevy, I know I could get it checked, but I fix cars, and transmissions, solenoids, etc, ain't ever heard this, I replaced the old cv joints, with 2 new front cv joints, not coming from the cv joints.

[@CurmudgeonTransmission]

Two things come to mind. The first is the diode sprag. It will make a clicking sound like that. The other is the park pawl, however it should be heard all the time, and probably would have park problems also. Are there any other problems with the vehicle? If you want to make a video of the noise and send me a request on my Instagram I will take a listen.

[@janpalmer3025]

drives good no problems at all.

[@janpalmer3025]

I will let you know, what the problem is, in a couple hours.

[@CurmudgeonTransmission]

If it is driving good it may just be normal noise the sprag makes. I would just need to be able to hear it.

[@automaticositapetininga]

👍👍👍🇧🇷

[@CurmudgeonTransmission]

Thanks

[@user-pw7pn5mo5c]

Братан спасибо тебе большое из России... По твоему видео буду собирать

[@CurmudgeonTransmission]

Thanks for watching!

[@user-pw7pn5mo5c]

​@@CurmudgeonTransmission скажи пожалуйста если будут вопросы могу ли к тебе отбратиться за советом?

[@CurmudgeonTransmission]

Yes. No problem. Thats what I'm here for.

[@user-pw7pn5mo5c]

@@CurmudgeonTransmission 👍