85 GMC Sierra won’t shift

Asked by Cameronmurphy90 Dec 06, 2020 at 03:12 PM about the 1988 GMC Sierra 1500 K1500 Standard Cab LB 4WD

Question type: Maintenance & Repair

I have a 85 GMC Sierra that is having trouble
shifting into any gear. When I’m in park and
it’s running after I’ve let it warm up it’s not
going into gear. There is a loud “whine” that
starts as soon as I shift it into any gear. If I go
into reverse I don’t hear the RPM’s change
and can feel the truck want to start moving
backwards but then stops. When I apply gas
the whine increases and the truck starts to
move it just seems like I’m needing too much
gas to get it to move. i’ve crawled  underneath
and can see that the shift linkage and arm is
connected into the tranny and I can move it
freely with my hand. All the fluid levels are
good and no obvious leaks. Please help.

1 Answer
3,055

JRKMotorZ answered 3 years ago

You can try using Lucas Transmission Fix but it sounds like your transmission's on it's way out.

Mark helpful

Your Answer:

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