LB7 / Allison 1000 Slipping (Delay) on Forward Take-Off

dgalvin66

New member
Mar 29, 2015
7
0
1
Las Vegas, Nv
I have a 2002 GMC Sierra 2500HD 4x4, is seems to slip (or has a delay) in 1st gear only during forward take-off. It does not slip for long or even every time I take-off. It runs perfect thru every other gear up and down shifting. I do not notice any jump in RPM when this happens.
I am wondering if it could be a sticky valve or bad solenoid. Also any good shops here in Las Vegas.
Looking for opinions and thoughts.
Thanks
 

dgalvin66

New member
Mar 29, 2015
7
0
1
Las Vegas, Nv
The fluid is right on and was changed in the last 500 miles. The fluid change was a bit overdue but the level was never low.
This problem started before the fluid change.
 

2004LB7

Well-known member
Dec 15, 2010
6,951
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Norcal
If your in Vegas the best closest shop is Inglewood transmission. Probably not what you wanted to hear but nobody can beat them for the Allison
 

dgalvin66

New member
Mar 29, 2015
7
0
1
Las Vegas, Nv
That's a bit of a ride. Hoping to find someone close that can help with doing the solenoids if that is the issue. I have watched a few videos and I do not feel comfortable trying to do it on the ground especially being disabled.