2016 Silverado 6L80 transmission trouble, won’t engage into drive or reverse unless I rev it up

Ryan16 · March 23, 2021

Hello, I have a 2016 Silverado, 5.3 and 6L80 transmission, i just had the transmission replaced with a remanufactured one from Detroit axle, it was giving me trouble from the time I drove it out of the mechanics parking lot, so they covered it under warranty and sent me another one, just had it installed and it’s doing the same thing, it will not engage into drive or reverse unless I give it some gas and it kicks in hard, and also, as I come to a stop at a red light or stop sign, it feels as though it kicks into neutral and will not move forward until I rev it up and it kicks in and clunks hard.. the fluid level is good. Any help would be much appreciated. Thank you in advance

Edited March 23, 2021 by Ryan16

rlcole321 · March 29, 2021

This might seem like a silly question, but does the truck roll easy when in neutral?

if so, what torque converter do you have in it?

Ryan16 · March 30, 2021

I will have to check if the truck will roll easily in neutral, the torque converter was replaced with the transmission as well

Daly · March 30, 2021

Did the shop prefill the torque converter before install? Sounds like it doesn't have enough fluid to perform properly.

Ryan16 · March 30, 2021

That was my first thought as well, but I checked it and the fluid level was good

pokismoki · April 23, 2021

techm might be bad, or its got an internal leak , either bad piston or tranfer port seal is leaking where the techm mates to the case ports

silveradosid · April 23, 2021

there is a utube video on this problem and it was an oring in the rebuild kit that wasnt correct for the pump and it would leak off the pressure

pokismoki · April 24, 2021

there are many reasons

Edited April 24, 2021 by pokismoki

Ryan16 · April 24, 2021

Had the transmission replaced twice in less than a month, didn’t fix the issue, had multiple mechanics look at it, nobody could figure it out, so I traded it in on a new truck, and not a Chevy. I made the dealership aware of the issues it was having and they said they will fix it. Thank you all for your help

JimCost2014 · April 24, 2021

1 hour ago, Ryan16 said:

Had the transmission replaced twice in less than a month, didn’t fix the issue, had multiple mechanics look at it, nobody could figure it out, so I traded it in on a new truck, and not a Chevy. I made the dealership aware of the issues it was having and they said they will fix it. Thank you all for your help

What did you get?