im-not-guilty

iTrader: (4)

I now not really the correct forum...but was not sure where else to post..
Tranny shat today in my 2008 silverado
6l80..
Stopped at a light took of then kinda felt like it was in 4x4..
Then that's it no forward gears .reverse if fine ..
No codes
Pulled the pan tonight and no debris..
Will tear into it tomorrow further ..
Any ideas guys...
Thanks

The Baron

trans is done.. clutches died.. this is what they do.. dont take it apart unless you have done it before or KNOW someone who has and has the tools, 6l80es are there own beasts and require some knowledge..sorry to be the bad news guy..

im-not-guilty

iTrader: (4)

Pretty sure it's not the clutches man but thanks for your input

1990LSx

iTrader: (9)

sometimes the valve bodies/tcm have issues. Did you turn it off for about minute and re-start it? I have dealt with several with that issue. You start it back up and reset the TCM and it drives again for a short distance and same issue. GM stocks the TCM/solenoid assembly for these at several dealers for a reason.

The Baron

Lol ok.. well I had one of the fastest 6l80e cars in the country and I have broken them in every way possible.

When ONE clutch pack takes a **** the trans does EXACTLY what you discribed.

Good luck..

1990LSx

iTrader: (9)

so that means your answer is the only possible answer? LOL

im-not-guilty

iTrader: (4)

Ok guys who had check ball stuck in spacer plate....
6l80 has plastic check ***** .
one was actually worn and stuck in the spacer plate
Passage...
Would have been nice to find before I tore apart the trans and found no internal problems...
Ya win some and you lose some ....
Cheap fix any way ..
Cost me more for fluid than it did parts to fix it....

1990LSx

iTrader: (9)

You mean the transmission wasn't toast? It wasn't just a minor fix? LOL

Glad you got it worked out bud

im-not-guilty

iTrader: (4)

Trans was no where near toast ..
I figured some thing broken due to all of a sudden .would not take off from a stop sign with no other warning..
So I just tore it apart ..
I scratched my head when everything looked ok...
Pulled the valve body apart to see if maybe a valve was hung up and found a check ball stuck in the spacer plate.....
The check ***** are the size of peas the stuck check ball was worn to the size of a bb..
Could have done it in the truck in just a few hours..
Well anyway.

DW SD

I have similar symptoms. Be surprised if the same problem, but who knows?

Did you have any codes?

I pulled P0777, which says Solenoid B open, but I've also read it could be low fluid. I might have been 1/2 quart low.

Thank you much,

Doug

grocerygetter

iTrader: (2)

Good info there.

DW SD

No traction on my thread (plea) for help . Should I have posted in the hybrid area?

https://ls1tech.com/forums/automatic...d-f1-swap.html

Forgive the cross post if that's an issue. I'm tempted to take out the valve body in hopes of finding the same issue. Would love some guidance from someone who has been there.

blak max

im having similar with p0777 but reverse isnt too strong. going to drain and open to check the *****