2011 Silverado 2500 Transmission Problem

leifshannon · May 26, 2014

Hey guys,

I gotta question about my company truck its a 2011 Silverado 2500 with a 6.0 liter and 150000 miles and im guessing a 6L90E? Heres my problem. I towed a load of about 7500lbs 350 miles without one single problem, I get back to my yard, back the trailer into its spot, and pull around and put it in park set with the truck running for about 5 or 10 minutes put the truck in reverse and had no reverse until i revved it to about 2500 rpms same in drive. I checked the transmission fluid while running and in neutral it was completely full and didnt seem burnt. I suspect the transmission is toast, but i thought someone here may have some advice any would be appreciated. Thank you

gmtech4 · May 27, 2014

sounds finished to me,,,

is the SES light on ?

plumbob98 · May 27, 2014

From the sounds of it, you're trans is not shot. Just the reverse band is probably toast! My 4l80e had the same problem. I was advised when going in reverse act like there's an egg under the accelerator. Reverse is the weak point!!! I paid around $900 to get mine fixed. Hope this helps!!

CapitalTruck · May 27, 2014

That's kind of tragic, that 2500 should have no problem with that.

leifshannon · May 27, 2014

The SES light isnt on

ujtruck · May 27, 2014

you must test your truck, with Tech2 scan tool. check all solenoids

leifshannon · May 27, 2014

Thanks everybody for the help Ill run it up to the dealer

gmtech4 · May 27, 2014

Thanks everybody for the help Ill run it up to the dealer

you have warranty ?

leifshannon · May 27, 2014

I sure dont its at 150000 miles

gmtech4 · May 27, 2014

From the sounds of it, you're trans is not shot. Just the reverse band is probably toast! My 4l80e had the same problem. I was advised when going in reverse act like there's an egg under the accelerator. Reverse is the weak point!!! I paid around $900 to get mine fixed. Hope this helps!!

what i meant was reverse is finished ,,,,we were told at tranny school that reverse is very difficult for a transmission to do .....they dont like it lol

his is under warranty most likely and he'll get a tear down and a build and get 'er barkiin again

C/K Man · June 6, 2014

6L90's don't have bands, that transmission is all clutches (much stronger). Since a delayed engagement is your only symptom, I would suspect an electric/electronic issue.

Colossus · June 7, 2014

Not all tranny failures will set a code.

newdude · June 7, 2014

Could be a valve issue or a clutch pack issue. These transmissions have no bands and are all clutch to clutch style as others have stated. Honestly to see one with an issue or out of a truck...atleast where I work, I have never seen one dropped for repair or replacement, 6L80 and 6L90. They are very stout units. Only things I think I've ever sold for them is filters.

rpryor · December 21, 2017

My 2011 silverado 2500 work truck did THE EXACT thing a few days ago. What did you figure was the problem and how much to fix it? I had just towed maybe 6000# 20 miles and went to back up and exact same thing happened. Thanks.