6 speed transmission adapts 6L80 6L90 Shifting issues 

Hey! I just want to say thank you for this video! My Suburban would randomly slip and hunt while in gear. I did the transmission relearn on a Solus and the damn thing shifts like a dream now. Thanks again for posting this video!

2009 Silverado 2500hd 4wd with 6l90. Won't stay in lock-up above 3rd gear. 1st thru 3rd are ok as long as I shift manually. Suspect it's in the solenoids but fluid was very dark when serviced 2 weeks ago.

My 6l80 trans shutters bad at low RPM driving. Tow haul helps clear it up a lot. I get the stabilatrack, traction, and ABS light comes up and stays on while driving

I have a 2012 Silverado 1500 and the other day my Wife turned the AC on, the transmission started shuddering between 2nd and 3rd gears. The weather here has been pretty hot, so I checked my transmission temperature 180 degrees. I'm going to change the trans fluid and filter tomorrow. The owner's manual says to use Dexron VI ATF. Do you think I should use what the owner's manual suggests or something different? Any advice would be appreciated.

Does it need to be driven once you tap the trans adapts button?with the scanner still plugged in?

I’m getting a p0990 after installing new pressure switch discs ?

I have a 2011 Tahoe with the 6l80. Rpms go up and down at a stop and then has delayed shift to first at take off ni then after that it shifts smooth ans runs good only thing is engine sounds rough. But the weird part is that it only does it sometimes. If it was mechanical internal it would never stop doing it. Engine running rough too. No codes. Could you think of anything I can look at before I go chop and hand my Netherlands to a transmission shop.

Thank u so much plz make vedio.. How to test solenoid s for tehcm tcm in details and how to test it by avometer and whats the normal values and numbers of ohms and voltage thanks alot and have anice time

Eric, I know this thread is old but thought I'd give it a try. I have a 2012 Yukon XL 6L80 and shifts poorly from 5th to 4th (no other issues). If I smash the pedal in 5th and it downshifts to 4th no issue. If I use the manual shift control no issues from 5th to 4th. If I use "normal" pedal pressure it feels like it's going to stall when shifting from 5th to 4th but then eventually downshifts. Huge shift lag (feels like I lose power then kicks back in). Do you think it might be a shift solenoid? No previous work done on this transmission.I don't have a transmission code reader so I don't know if there's a code. Thank you for any thoughts or advice. Jeff

Have a VE with the 6l80e, have replaced clutch packs and seals etc shifts fine but now slips under heavy load, it has a cam and histall torque converter installed, had dtc P0777 pop up the other day, has had the zip kit installed aswell as a new lower half valve body, all new pressure discs and seals too, will doing the reset preset fast learn sort the hold pressure out?

Do you know if tech2 do the fast learn? I just see reset adapts?

Trans would be driving a long and change gears and then start slipping and stop driving forward. So i changed the strainer and fluid look like it got worse and now drive forward or reverse. So park it while trying to locate another one. 2 months go by I went to crank it. And if in move backwards and forward and changed gears. But I'm afraid to drive it for fear of it stopping. Any suggestions as to what it could be doing.

Hi 👋 where can I get the stock file for the 6l90E transmission?? 2014 Chevy Express 3500 LGH Duramax HP tuners

Hello, my Yukon shifts rough. I have codes p0842, 872,877 and 989 all low voltage pressure switches. It was rebuilt at an unknown mileage at some point. Oil and oil pan look clean. What does all 4 codes indicate? TIA

Hello how you doing, I have an issue with a 2014 Chevy express 3500 ,6l90 trans. The issue is when your going 70mph you put the cruise control on then when it down shift from 6th to 5th, it won't release the 6th gear what so ever, the same shifting down and up manually, please help any idea what could be wrong. Any idea what could it be thks.

I got a 2013 Silverado with the 6 speed. At full throttle all shifts are hard. Like the whole truck lurches forward. Do you think that could be a bad transmission?

I know this video is old. So 07 corvette. Had a faulty 1st gear shift solenoid. Replaced tcm and then valve body and the car still isn't right. First issues was a flare shift. Bought car this way. Trans was supposedly replaced. Car will never make it through a relearn. Also it starts in forth gear if I command a gear it hunts and slams between gears. Fluid the first change was trashed. Bunch of material and some metal. Before it would just show am x on the heads up display but now just flashes all the gears. I'm starting to believe it's internal of that trans. Any ideas would be greatly appreciated

so I have a 2007 silverado with a 6l90 ..replaced my Trans with a junk yard trans.. If I start in drive it's in first gear but as soon as I touch the fuel pedal it goes into like a neutral mode and won't hit 2nd gear. check engine light comes on and then it's stuck in forth gear. If I manually start in second get up to speed then throw it in drive it then drive and shifts perfect until I have to stop again then I have to throw it back into 2nd..for the life of me I can't figure it out.

I’m having this issue on my 16 Tahoe and took it to the dealer to run for hidden trans codes. They found none. They flushed the trans at 85k miles and I’ve driven 7k miles with the trans still acting up. I’m betting that the issue is more related to your video

I’ve never got a code. my 1st 2nd and 3rd gears slam you literally can’t get on the highway unless you have a half mile gap. It’s a 2017 Silverado with a 6speed. I’ve also replaced the torque converter

Shop replaced the transmission with a remanufactured unit. It has a late shift into 3rd or 4th and runs at 1700rpm going 40 mph.. is this normal at first until it relearns adapts or is it a bad trans?

My #1 checkball was stuck in the separator plate so I recently updated separator plate and check balls in a 6l80 also added the 8th check ball to soften 3rd to 2nd downshift. After putting everything back together car still has same issue, should I do this what your talkin about to let the cpu I fix the problem and also updated parts??

Is this what you do after replacing your 6l80e tcm with a remanufactured tcm from autozone??

I have a 6l80 2015 suburban 130,000. My wife has reported 4 times so far that at slow speed, generally acceleration from a stop, all four tires lock up and the vehicle screeches to a stop, then rolls on and proceeds with no problems. Transfer case or transmission?

Will any 6l80 transmission fit my 2016 Chevy Silverado ? Mine went bad don’t wanna rebuild I want to buy a new one

I had my transmission shaped from a 11 Tahoe to my 11 silverado 6l80e its shifting but not as smooth as it should be what should I do? Does it need reprogrammed or fast learn procedure?

Could I swap a 6L90e to an Allison Transmission? Will it be compatible for the swap?

Every time I try to reset the adapts i loose all gears and have to unplug battery to get them back. Is that the tcm?

swapped out my 6l80 for a 6l90 after the swap I got code U0100 , trucks shifts but does not go on over drive , any suggestions on what to do ?

i have a 2014 Chevy Silverado i had code p2714 and i replaced the valve body and techm and it was preprogrammed on delivery but the code still is there and truck still in limp mode how can i fix this issue without spending thousands of bucks?

I got a 2016 gmc sierra 1500 shifts hard from 1-2 auto trans any ideas?? Noo code

Hi, and thanks for that video , i do have a 2008 GMC 2500 HD 6 Liters , gas and do have a HI REV when i do use the TOW HAUL fonction only , and not even pulling anything motor his reving so high then shifting , then thack going up again , should sentd you the small video i have filmed , and oh YES , NO CODES in the dash board ??????

Whats tye part number for solenoid rebuild kit?

So I did this and my shifting was perfect for the first 50 miles or so, but then the harsh downshift slowly came back. Should I reset it again?

I have code p0752 15 gmc yukon and everything new

My car suberban 2012 two wheel drive

P0741 P0700 P0756 2009 chevy 2500hd 6l90