4L60E Trans Issue (Won't shift out of First)

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Oct 6, 2015 | 08:59 AM

#21

Adam_construction78

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Joined: Oct 2015

Posts: 1

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Quote:

Originally Posted by BuckyGMC

Gentlmen, I have a 2000 Yukon XL with the same exact problem. Took it to a tranny shop, Honest Freind, He hooked it up and said Electronics were fine (After I replaced the Solinoids) I had to be a Clutch issue.. So I pulled it and replaced all Metals and Clutches. replaced the Seals on the Servo as well,, I Put back together and it is doing the Same exact thing. Something in the Valve Body that I am missing?

Did you ever figure out what the problem was, I have a 99 yukon and rebuilt the motor and it still has the same issues... Thank you

Sep 23, 2024 | 10:36 PM

#22

ryleytran8

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Joined: Sep 2024

Posts: 2

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Quote:

Originally Posted by 2DMNFST

Ok I took it out this morning and the truck does indeed shift through all four gears, however, it will not shift out of first until around 2900 rpm and then you must let off of the gas completely (0% throttle input) for about a second and it will shift into second, the same thing happens for third, and simular for fourth. Except with fourth if I give it any noticable throttle, I'd say above 5% or so, it will downshift strait to third. Im starting to think it is a TPS issue, if you guys have any ideas let me know.

Thanks.

i have the same exact issue, starting to think its my tps or vss also, not sure tho because im shifting late from 1-2, and sometimes 2-3

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