Question about 1996 GMC Sierra
Sounds like you've lost one of the bands, more than likely the overdirve band. It's the weakest part of the trans and does most of the work if you're normaly a highway driver. Could also be a clutch pack or sprag, but since you have 2 forward gears I would shy away from either of those failures. I would suggest removal and inspection. Do not drive it any more, as if it is the overdrive band, the only thing you're doing is tearing up the internals of the case by driving it. This will eventualy make the transmission core unrebuildable.
Posted on Dec 10, 2009
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Posted on Jan 02, 2017
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