6L90, building the tehcm pressure switches
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- čas přidán 8. 09. 2024
- In this video, i show the rebuilding process of the pressure switches using the sonnax tool. As long as the tehcm eletrically checks ok, rebuilding the tehcm can save some big money. To buy this is about 600.00 from the dealer and then it has to be programmed.
Thank you for doing this video! I removed the valve body on my G8 today and rebuilt the switches and replaced the 7 balls. I installed the trans go clutch select and TCC regulator valve kit along with the o ringed end plug kit. Two of the films in mine came out in two pieces. I measured the plastic balls and they were .246 to .248 but I replaced them anyway. When i get home from work tomorrow I'm going to put it back together
sounds good, let me know how it works
Where do you get the balls from ( Pause)
I bought them on Amazon. They were. .250 size from sonax. It seems to be a common size
@TheTheomax how did it go?
It works much better. Two of the round disks for the pressure switches were bad. They looked like somebody took a hole punch to them. The company I got the kit from to repair the switches said In the directions it would be the two on the right side and they were right. It was well worth the time and effort to make this repair.
Great video. I just replaced all clutches and torque converter on a 6L80 and ran into slippage. This should do the trick getting it repaired. Thanks so much.
Thank you very much for hard to find, very detailed, very nicely prepared video. I learned a lot
Thanks for the informative video. I have a 07 escalade I am working on. Started slipping into neutral when accelerating a little hard or if pulling a trailer. Only code is Lost communication with the module. I bought the kit you used to repair the switches but I am now thinking it won't help. I did have the tranny rebuilt, all parts from Transtar, made no difference but the Tehcm is still the original. If I drive this car easy it works beautifully. Accelerate anywhere near hard and it flips into limp mode and stays till codes are cleared. Thanks again for a great video.
Did you fix it?
I installed the kit to rebuild the solenoids, kit worked well no problems with that. Unfortunately on tear down I did not find any of the little wafers torn or failed. I did install the new ones and re installed the Tehcm and it did not improve at all. I found a place in Florida, Street Smart Transmission that sells a rebuilt Tehcm, offered great customer service, answered each and every one of my questions before and after installation for a reasonable price. The Rebuilt Tehcm fixed my tranny issues. I also purchased the rebuilt valve body with it for an extra $130 I think. Sure wish I had figured this out before rebuilding the transmission. Oh well, live and learn. Could have fixed it for less than $500 rather than $3500. Ouch! @@warriorplutotrent3827
I forgot to mention, they also programmed the new Tehcm so it worked on install and explained how to do the first drive test very thoroughly. I would use them again every time.
@@mrmcd5728 thanks for the information. I'd rather go the route you took cause that valve body sometimes loses pressure and I think that was your problem as well. I'll look them up and give them a try sometime. Thanks again
Great video, Gary! Dorman update on the plug and play feature when I inquired on 2.7.19:
"Good morning,
When we first launched this program we were providing a software transfer tool that would pull the info off the old module and write it to the new one through the OBDII port. We were forced to cease and desist the use of that tool due to copyright reasons. At this time the units need to be programmed after install with GM software. That can be done by a dealer, remote programmer or through the RAP kit you mentioned.
Sorry for any confusion."
i usually go OE on the Tehcm
Thank you for this great tutorial sir
THANK-YOU SIR, VERY NICE VIDEO,....BLESSINGS !!
That 4t60 sun shell comes in handy for so many things
yes, it sure does.
I've got a 2011 Chevy Express Cutaway with a KUV body and 6.0 liter motor. When I start it for the first time of the day, I can drive fine for what seems to be a random amount of time. Maybe 20 minutes, maybe an hour. Eventually, I hear a whine out of the transmission that follows the RPM of the motor. Shortly after, it acts like it's in neutral and won't go forward or reverse. I can shut it off and stop for about 30 seconds or so and it runs just fine again until the noise starts. After the first time, it does happen a lot more quickly than the first time of the day. I have noticed that if I get above 40 mph, I can drive a lot longer at the highway speeds until I slow back down to below 40 mph. One shop said to just put a new transmission in that looked at it and another thought that was probably the case with a phone call. It's only got 68,000 miles and we don't work them hard. It's actually overkill of a vehicle for what we use them for. I have an exact copy of this van in a 2012 with close to 100,000 miles and no problems. Also have 4 other 2500 vans that vary in age (newer than 2011) with similar miles and no problems. Thoughts?
Sounds like the filter is clogging up, something may be coming apart in the trans, the noise your hearing is the pump starving for oil, when you shut the car off, all the crap in the filter will flow out until its started again, you may want to drop the pan to see whats going on
Gary Ferraro is the same problem with mine but I’m getting a code that says : “ clutch pressure solenoid “
Hands down this is the most well put together automotive how to video on CZcams.
Under high load at low rpm my torque converter lockup is engaging and disengaging rapidly. This seems to be what my truck needs. Fluid looks good and everything else shifts as it should. Temps stay below 140 typically. The truck is a 2012 Sierra 3500 srw 6.0 gasser. Would you agree?
Thank you
I can't wait until you do a complete rebuild on the 6l80 or 90 can't wait
Great Video with great explanations. Have a 2006 STS V, seems to be skipping 5th when in automatic mode but fine when manually shift through all gears. Haven't pulled any codes yet but I've already ordered kits to rebuild switches and extra balls.
Drove at lunch time now with shifter in M/S side appears to shift correctly now... WIll still pull codes and R & R switches
I would scan the TCM to see if there are codes, that may give some direction
Scanned last night with a tech2 shows no codes
In 5th, there is the 3,5-Reverse clutch on and the 4,5,6 clutch on. How does the trans work cold compared to hot?
Gary first and foremost I want to thank you for your excellent video's and the fact you are answering my questions. The trans would shift the same cold or warm in the normal mode. As you may know this car/transmission has multiple operating characteristics depending on position of the shifter. In the normal mode, shift placed in D as show on the dash, it shifted the same way cold or hot. It felt like it was going to 5th and then immediately locking up the converter, shift to 6th and lockup was fine. If I moved the shifter to the right in the drive "D" position the dash shows sD, which is the sport or manual (TUTD) mode in which case the transmission uses a different set of tables. The shift points/speeds are raised as well as TCC lockup points and the transmission shifted fine through all the gears and lockup points.
I have HPTUners that I use to tune cars for myself and other people. What is included is what is called VCM scanner, with the scanner I scan any number of things related to the engine/transmission in real time and create a log of what was going on when I am scanning. Another thing that scanner lets me do is reset the TEHCM module and let the module relearn/auto adapt the pressures among other things. I did that last night. This morning while it was re-learning/adapting all the shifts were kind of flaky but after a number of stops and automatic shifts 1-6 and TCC locking it appears that what I was experiencing is now gone. I have to go out at lunch and run some errands in the city (Durham NC) with a number of stop and go's due to lights and traffic which will be a good test to determine if that indeed fixed the issue. I will add another reply after the run.
Again thank you for your time and experience.
Awesome vid! Thanks for the great info. I’m pulling my valve body now and hopefully I can repair it. Can you possibly send me a link to find/buy the kit and tools? I would greatly appreciate it
I love this transmission one tough sob
Yes, it has some common issues, but nice to work on.
That's what I looking for .
Thanksssssssss
Garyyyyyyy
Hello Gentleman, where you find the kit, Amazon? Cause I found one on Amazon and I'm going to do the replace this weekend. 👍
I bought mine from Sonnax
Hey Gary or anyone, 2011 silverado have only 1st and reverse code is 0797 pressure solenoid stuck open. Found some metal in the pan but not too much. Will fixing the solenoid fix not shifting into 2nd gear? Thanks
Hey What i have to do next? i have the erase the codes? or they just desapear? or they run like new whitout doing nothing ! thanks for response!
clear the codes with a scan tool
Muito bom seu vídeo, parabéns pelo trabalho.
Translation
Thank you for the video.
What do you recommend for cleaning the tehcm?
Mine had p0751 & definite converter failure. Metal all thru transmission. I'm doing a full rebuild at home.
Assuming submersion in solvent isn't a good idea. Is spraying with brake parts cleaner a safe way to clean the solenoid passages & pressure switch film areas?
Sure that will be ok, when you get it back together and it doesn't shift correctly Tehcm maybe the problem. i always change them
Nice video Gary. Couple of questions; Does this tool work if you use the TransGo parts found in the SK? How much was the tool? Thanks in advance.
I never used the transgo parts but they should all be the same so i would think it should work. Not sure on the price, go to the Sonnax website
Hi Gray,
I have 2009 STS V8 4.6L, i have 3 problems
First: manual shift stop working with no error code.
Second: when move from zero speed the rpm increased with no move for 30 - 60 second and suddenly the car start moving and on the scan tool i got TCM error.
Third: from speed 60 mph and reducing the speed you feel like there is gap.
Please let me know if the repair kit can fix this issue or not
plz Gary parts1 for rebuilt .
part2 to rebuild valve body.
part3 to diagnosis
+احمد محمد Thanks for watching, to rebuild the valvebody, i just put a set of o-ringed end plugs i get from sonnax, and i will try to film the next diagnosis i do on one of these units.
Gary about diagnosis we wait that I hope see that film
i will certainly try
Hey Gary i know that im 4yrs last but my solenoids are all reading .3 and .2 but works fine electronically . Nothing is between Sonnax tolerance. Should I replace my Techm then? I appreciate your expertise thanks
Are you getting codes? if so what are they
Yes i am P0700, P0777, P0796.At first i was getting P2715, P2726 but those went away after i hooked up the mag ride. I want to add that i re built the trans and installed the sonnax upgrade kit for the 6l80 with a 3k stall converter. I drove the car but it just doesn't seem to be shifting normal. Would that make a difference with the techm?
Also i just went and purchased a new multimeter to see if mine was faulty because it's old but with solenoids 2and4 im getting. 0 reading im leaning towards the techm.....
@@lostfound9346 For everyday use 3K stall is to high, I rarely see electrical codes, The solenoids do become mechanically clogged and it will not shift correctly, every rebuild gets a new one
Well i figured I'd go 3k because of the work that i have done to the motor. I know that i still have to get a trans tune but i figured that it still should at least change gears. Do you have a vendor that you would recommend to get a techm from and also a site to donate to. I know advice isn't free and im appreciative for you taking time out.
ahoj poradíte? na D, moje auto se nepohne. M startuje, ale 1., 2., 3. na plný plyn spojky sklouzne. Změnil jsem těsnění na 1,2,3,4. zapečetěný do thcm, olej, filtr. v tcm nejsou žádné opotřebitelné díly. těsnění čerpadla je vyměněno. všechno vypadá neporušené. vůz řídil 60000mil. jsou vyměněny statorové prstence. prosím help.6l50 camaro 2014 v6
Great video. I have 2008 Yukon Denali With the 6.2 engine with the 6l80e, I'm having an intermittent problem with the trans. It shift's great through all the gears except overdrive. Some times it really bangs hard into to it. I have had the codes ran and it is multiple pressure switch codes I believe there was 3 codes for the pressure switch faults. Do you think this could be the problem?
It very well could be, very common for the pressure switches to come apart.
Hi Gary quick question I have a 07 GMC Acadia and I have a code p0796 inside my transmission pressure control switch c stuck closed can you explain the symptoms to me please cause the only symptoms I have is a rough idle and my gear will show drive on the dash board but it says limp mode I pull over shut car off and restart it again and my transmission fluid gets hot as ever by fixing the pressure switches will this fix my problem that’s the only problem I have with this car this is my 3 transmission pleaser help with any advice if you can
The computer is looking for the switch to open or close at a given time, if it reads open when should be closed or vise versa the code will set, common issue is the laminate disc is probably no good
I got same 4 codes as in your video ( 3 pc solenoids stuck 2off , 1on ) and 1 pressure switch code , Is the tchm and valve rebuilt would fix issure or is that only for the PS code .. thanks alot for the informative video
Fixing the pressure switches should do the trick, very common problem
after doing this is there any gaskets or seals to replace? Or am I able to put it back together?
no gaskets or seals, just put back together
The codes you mentioned, are they reported by snap on scanning tools or the Acrons from parts store?
I use a snap-on solus
Would this cause check engine light. I have a 2017 and experienced slip on low gear then it stop going into drive. I had reverse and parking natural. But no lights came on
That almost sounds like a checkball shrunk down causing a leak in the drive oil. So no forward but you have reverse?
@@GaryFerraro
Yes only reverse
@@skubasteve1751 very possible you have a valvebody problem, a checkball shrunk down and your loosing your drive oil
@@GaryFerraro dealership is saying I need a new transmission
@@skubasteve1751 yes, they wont fix the trans or install a new valvebody, they want to do the whole thing
Hey Garry. I have a 2010 2500hd 6.0 and I'm getting codes P0965 P0969 P2762 which are solenoid torque converter clutch pressure, and pressure control solenoid b and c. Randomly when I start the truck it's as if it's stuck in a lower gear then I restart the truck and it's fine again. Just curious on thoughts and if the tehcm could be responsible?
Yeah. Down here Gary?
Gary, wondering if you'll have time to find my questions on this 6 yr old video. I found your video on the 6T70 tear down. In that video twice you mention having already did a video on the TEHCM rebuild. So I searched and searched and searched but never found a 6T70 TEHCM rebuild. By chance I came across this video on the 6L90 and your electric checks for the pressure switches. I have already installed the Sonnax seal and yellow film disks in the 6T70 which fixed the long pause when moving the gear selector from reverse to drive. The change to drive is now immediate. While I had the TECHM out I removed the screen panel but found no pins to check switch ohms and continuity. Can you explain?
This 2011 Traverse never had a shift problem even with all 4 yellow film disks bad. However, it has a shutter that remains early in the shifting 2nd or 3rd but not later in overdrive. It's apparent to me after watching your video on a 2013 Enclave it maybe the converter but I have not had that manually commanded to check for it. Since this shutter is in the lower gears not later in higher speeds I suspect what I found in another online video is that a wave plate is damaged and causing the shutter not the converter. Any thoughts are appreciated. Great videos!
I do have a rebuild video on the Techm rebuild, for 6L90. The shudder that you feel is it like driving over railroad tracks or like a wash board effect ?
@@GaryFerraro Right, but you referenced a TEHCM rebuild in the 6T70 tear down video. That implied to me it was a 6T70 TEHCM rebuild not a 6L90 rebuild. So I couldn't find the pins for checking switch electric in the 6T70 and don't understand why I didn't see it plainly. Not sure I know how to tell the diff between rr tracks and wash board so I'm gonna say wash board more of a chatter always when accelerating
@@GaryFerraro I should include now that the seals and yellow disc films are replaced in the techm the shutter is more frequent if not every time at the 30 mph shift
@@GaryFerraro think i would also add the shake or shudder resonates into the steering column. is that what you meant by feels like rr tracks?
@@GaryFerraro feel pretty sure now the shudder is gears 3 & 5. apparently the 3, 5 wave plate
I wonder if I can do this without taking the transmission off the truck.
You sure can, just drop the valvebody
I have 6L90 Trans giving me code p096( pressure control solenoid c performance stuck off) and p0700 (transmission control system) I order 4 new solenoids from napa. Am I able to just replace the solenoids?
That's all in one, i don't think you can. what is the car doing?
@@GaryFerraro seems liked it slipped out of gear, also shifting very hard. I called the dealership and I'm just gonna have them rebuild the transmission. They gave me a list of things wrong with it after I dropped it off to them
Great video..Mr. Gary plz what type of scan tools you are using? I need to buy one but I need your advise which tool ??
Thanks
I use the snap-on solus edge, small scanner and perfect for what i need it for
I’ve got the solus edge as well. Do you have to have anything special to recode the techm? Thanks Gary
If I were to just repair my valve body solenoids/and rubber bushings. Do I Still need to get it reflashes?
what kind of car?
It’s a 2017 GMC Sierra 6L80E
@@franciscoortega5508 if reusing the same TCM you do not have to, solenoids are part of the TCM, they cannot be changed, the pressure switches can be repaired
Ahhhh yes the switches sorry. So if using same tcm it will not need to be reflashed. Great!! I appreciate the quick response.
@@franciscoortega5508 correct
2010camaro 6l80e pulled up to stop when I left started through the gears when shifting to 4 there is nothing pull back to 3rd gear does just fine. Any thoughts. Need help
Doug Nicholson The 4-5-6 clutch hubs snap on these units
@@GaryFerraro thank you very much for your reply. There is also a wine coming out of the shift solenoid pack with the key on car not running. Normal??
I've a 2007 2500hd 6.0. It's slipping pretty good between 2nd and 3rd. I suspect some sort of pressure loss as it slipped less at higher rpm. Where do I start to diagnose.
This there a check engine light on? any codes in the trans?
I have my 2008 Silverado 2500hd whit 4 and 5 slipping and some time reverse I have to push gas to reverse some
Have a question I have 6t75 it in 2010 Buick high revving from 3 to 4 it doesn't do all the time has no codes could it be one of the switches be bad
That generally will not causing a slip inbetween gears, are there any codes?
@@GaryFerraro no codes in it only slips from 3 to 4 and not all the time and it got stuck in 2 one time till I put in park then shifted fine
I have a 2008 cadillac escalade and i have a hard shift in 4 gear and when it down shift too, and got a p0989 code,you think i have a pressure switch problems??? Thank..like your videos..
I would certainly start with that, after the repair is done, the codes would need to be cleared and a fast learn adapt should be performed with a scan tool, when codes are present the computer freezes shift adapts
Thanks for your help
Your welcome.
From where did you get the spare part switches for the tehcm???
Sonnax sells the tooling and the kits
Hi Gary I have a 2009 Silverado with the 6L80 transmission and sometimes when coming to a stop while rolling slowly on brakes the truck jerks do you thing that’s transmission related and also sometimes when I come to a stop and give it gas again it revs and then slams into 2nd gear and wouldn’t have 1st gear until you turn the truck off for 15-20 minutes and turn it back on again then the 1st returns what you think the problem is please help me thanks
First, check fluid level and scan to see if any codes are present
Gary Ferraro fluid level is good at operating temperature and got a P0751 code couple years ago and haven’t gotten anymore
@@williamwinter6797 fluid level is ok, very possible the #1 check ball shrunk down
Gary Ferraro ok will have to check that. Thanks Gary anything else I’ll hit you up appreciate the advice
@@williamwinter6797 ok, sounds good
I have a 6l80 that feels like 4/5/6 is neutral I have a pressure switch stuck open code could this possibly be my fix? Never felt any slipping or strange noises before this happened nor is my fluid burnt or any particles on my dip stick ? Shifts 1-3 and into 4 and down shifts smoothly but 4/5/6 feels like neutral
The hub and shaft for the 4-5-6 clutch probably broke inside the trans
Gary Ferraro thank you i figured it was hard parts being that there was no clutch material
James Smith Actually it is a common issue
Gary Ferraro thank you much for the information. Fun task of dropping the trans from ramps begins lol
I can install those without the tools....very easy!
RT
Please any info or thoughts might help in the right direction
I have a 2011 Gmc sierra 2500hd 6.0 I have a problem when changing from first to second hits more than normal
Any codes in the trans?
@@GaryFerraro I have same thing with a p0776 code
PLEASE HELP I have 6l90 2500 with 6.0 it shifts fine for awhile then stops shifting I shut the truck off restart it and it shifts fine again..im at a loss for words..computer? cylinoids? it's hard to believe the trans is bad it doesn't slip and restart it shift good again ....a week before that I drove it 50 miles no problems brought it home and this started
There has to be codes present, have you had it scanned for codes?
I have the same problem on a 2012 2500 6.0 and the codes I have are p0700 p2723 p0796 any help would be appreciated
Hey Gary. I have an 07 Escalade that has a neutral condition when first accelerating. I can't tell if it's first or second gear. Happens most when making a turn. It is all time awd. Other than that it seems to shift fine. I sometimes do have to wait for the rpms to go back to idle before it catches and goes again. Any ideas? I was told it might be worn check balls
Could be the number 1 checkball, however since this happens on a turn, check fluid level, if it reads full. i would overfill it and see if problem still happens. Falling out of gear on a turn could be low fluid
@@GaryFerraro thanks for the reply.
@@derrickphillips354 Your welcome
Hi destro what was the outcome of your problem did the overfilling of trans fluid fixed your problem ?
@@williamwinter6797 I took the valve body out and split it open. It was the number 1 check ball stuck in the separator plate. Replaced all of them. Fixed the problem. I also heard that there is a spot for an 8th check Ball but you have to get a different separator plate I didn't do that
How does that fix a stuck open code? p0777 specifically
That is a mechanical code pointing to an internal problem, trans will have to come out and overhauled? what is it doing when you drive the car?
Car doesn’t want to shift into 4-6 gears, but it will if i manually shift it.
sounds like 4-5-6 clutch is no good, what happens on the 3-4 shift, engine rev up?@@mikeadams8470
@@GaryFerraro it shifts fine man manually shifting it though. 5-6 is delayed though.
If there is a problem with the 4-5-6 clutch it may have issues in the higher gears, that clutch is the driving clutch for the higher gears, if worn may not hold the higher gears@@mikeadams8470
I'm about to do my first 700r4 any tips? Or can you make a video?
+B Hart I think i have a teardown video on a 700R4, im going to search for it, edit it and i can put that up on saturday. Gary(i should be able to find it)
great video I very got one running me ragged overhauled unit and when it's hot it develops 1 to 2 and 2 to 3 flare neutrals out in first at a stop sign the only thing I found was the acuator feed limit valve was really tight in its bore used bench buddy and polished the bore would this be enough to cause this thank you love the videos
Mike Eustice
Mike, did it have this problem before? Sorry for the late reply but for some reason my answers do not post,I have to answer through my I pad
Gary Ferraro yes it did the reason for the over haul was for this reason which I found the pump tore up got a complete overhaul bushing bearings fractions and steels it's a 2010 no codes at all performed quick relearn many times tore the unit back out and that's when I noticed that the valve was dragging
Did you by chance do a line pressure test? see what your base line is cold verus hot
Gary Ferraro no I did not I'm going to check the pressure regulator valve and boost valve hopefully later as I put a good used pump assembly in it thank your for replying
I'm going to see I'm my local gm dealer will let me borrow their solenoid leak tester
Hi Gary please help. I have a 2011 2500hd Silverado with the 4L90 and it had codes p0723 ,p0741,p0742,p0776,
p0796,p182e, p2714 , p2724 stored. I cleared the codes and ran it till it stopped completely being able to move and the only code that its giving me now is P0842 ( transmission fluid pressure switch 1 circuit low voltage). Do you think doing this will solve the problem? Truck moves when start up cold but after it heats up it is not able to move. Thanks
If this is the 6L90, no that will not fix the car, the problem your having is a clogged filter, car will move cold but no hot is a classic sign of a clogged filter. What is probably happening is your torque converter is coming a part clogging the screen
hi gary good to see you back
i want to ask you about 09G solenoid
is it okay to weld the cap to the solenoid because i dont have access to transgo shift kit
+issa alazzabi I honestly cant say yes because ive never done that before, but i would think if your going to try it, you will have to go all the way around so the solenoid wont leak, do you have access to solenoids?
+Gary Ferraro yes i already done that but ididnt install them yet
+issa alazzabi is the pressure in the back of the solenoid is so high
+issa alazzabi not sure, the solenoids are pulsed, some are normally open and some are normally closed, so some open to apply pressure and some close to apply pressure. In the back of the solenoid is the armature that needs to move for a smooth shift, but i would think the pressure could get upto maybe 150psi. As the solenoid is pulsed on, if i leaks out the back it may not be able to perform the way it should.
+Gary Ferraro the pressure is only in the valve of the solenoid right
Hi can i have this tool ???
Also my friend tell me that I'm going to spend around $200.00 on parts but not.
Man, 360p in 2016? Are you kidding me?
computer keeps telling me theres not enough room, tried deleting getting rid of stuff,still says that
YOU NEED HD CAMARA
That was my old PC wouldn't let me upload in HD, I have upgraded since
Gary? Is it because I put an extra r in your name?
???? Did i forget to answer a question?
@@GaryFerraro Hey Garry. I have a 2010 2500hd 6.0 and I'm getting codes P0965 P0969 P2762 which are solenoid torque converter clutch pressure, and pressure control solenoid b and c. Randomly when I start the truck it's as if it's stuck in a lower gear then I restart the truck and it's fine again. Just curious on thoughts and if the tehcm could be responsible?
Still no reply?
@@davidspurlock9867 Sorry must have missed it, give me about an hour when i get home. want to look up meanings, but i think from the codes your pressure switches my be bad, are you familiar with rebuilding the switches. Again sorry, been going crazy at work, working 7 days last 3 weeks(but not complaining)
Ok not pressure switch codes, all solenoid performance codes, how is the fluid level? Does the truck ever not move when in drive?