Opinion on the 6L90? Cost to rebuild?

Dozerboy

Dozerboy

Well-known member
Jun 23, 2009
4,892
470
83
TX of course
Looking for a used work truck (Gasser). Found a 2011 with a smoked trans I guess. I was wondering if they where problematic? Any idea whats the balllpark cost to rebuild one is? The guy says works fine and after 2mins it just stops working. Im just trying to get an idea if I even want to go look at it. I talked to a trans guy about it and if I dont want it he does. LOL

Thanks
 
Tothemax

Tothemax

xgmtech
Oct 16, 2014
607
8
18
new york
I believe the 6l90 is a very strong trans. it was probably mistreated. I have 2 6l90 2wd transmission if you are interested
 
Tothemax

Tothemax

xgmtech
Oct 16, 2014
607
8
18
new york
If it has the tap shift on the shifter it's a 6 speed 6l90. I believe by 11 it's definitely a 6l90 if it's gas.
 
WolfLMM

WolfLMM

Making Chips
Nov 21, 2006
4,005
26
48
38
AL
The 90 is basically a beefed up version of the 80. It has one more clutch plate in each pack, slightly larger shafts, and 6 pinions in the input carrier, more ribbing in case. Ive got a busted 6L80 and a working 6l90 here at the shop. Awaiting time to swap into my c10:D
 
WVRigrat05

WVRigrat05

Wound for sound
Jan 1, 2011
3,081
4
38
36
French Creek, West Virginia
I know you can throw a diablo sport trinity in a 2015 6.2 all terrain and do gear banging burnouts and 6k rpm super hard shifts and parts won't scatter like my 4l80 did 3 times in 4 months in that 06 R/C.

Not sure if the 80 or 90 is in the 6.2 but they are tough for sure
 
TROJAN366

TROJAN366

Gold Rush
Jan 13, 2012
2,474
1
38
MASS
WVRigrat05 said:
I know you can throw a diablo sport trinity in a 2015 6.2 all terrain and do gear banging burnouts and 6k rpm super hard shifts and parts won't scatter like my 4l80 did 3 times in 4 months in that 06 R/C.

Not sure if the 80 or 90 is in the 6.2 but they are tough for sure
Click to expand...

My father has a bone stock 2015 ECSB GMC with a 6.2 and idk what it has for a trans but it doesn't need a tune to bang gears in a cloud of smoke! Seriously making me consider whether or not to go 17 dmax or gas 6.2 1500 for my next truck
 
WVRigrat05

WVRigrat05

Wound for sound
Jan 1, 2011
3,081
4
38
36
French Creek, West Virginia
TROJAN366 said:
My father has a bone stock 2015 ECSB GMC with a 6.2 and idk what it has for a trans but it doesn't need a tune to bang gears in a cloud of smoke! Seriously making me consider whether or not to go 17 dmax or gas 6.2 1500 for my next truck
Click to expand...

They haul ass, we always use the shop driveway to the first sign on the straightaway to run stuff, my truck does 80-85 to the sign and the 6.2 does just under 100.
 
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