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
3,105

JRKMotorZ answered 4 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:

Related Questions

  • 85 GMC Sierra won’t shift 1 Answer

    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 s...

    1988 GMC Sierra 1500 K1500 Standard Cab LB 4WD

    -

    Maintenance & Repair

  • 85 GMC Sierra 1500 won’t shift. 1 Answer

    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 soo...

    1988 GMC Sierra 1500

    -

    Maintenance & Repair

  • 95 GMC Sierra won’t shift past 2nd 1 Answer

    My gmc is an automatic and when I try and drive it it shift from 1st to 2nd fine then when its time to shift to 3rd it just revs really high. I changed the transmission pan gasket recently because I...

    1995 GMC Sierra 1500 K1500 SL 4WD Standard Cab SB

    -

    Maintenance & Repair

  • my 2007 gmc sierra wont shift into third gearf 1 Answer

    My 4wd 2007 gmc sierra won't shift into third gear what can I do?

    GMC Sierra 1500

    -

    Maintenance & Repair

  • 1990 GMC Sierra Won’t Move When In Drive Or Reverse 1 Answer

    Truck has been fine until the temps dropped from 60 degrees nightly to 37-39 degrees nightly which happened from one night to the next in one 24hr. timespan. Next thing I know, I wake up and it’s t...

    1990 GMC Sierra 1500 C1500 Standard Cab LB

    -

    Maintenance & Repair

Shortcuts

Search GMC Sierra 1500 Questions

CarGurus Experts

  • #1
    yetilikesbeer
    Reputation
    12,850
  • #2
    dragonflyoffshore
    Reputation
    11,820
  • #3
    John Saffrahn
    Reputation
    11,720
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-150
320 Great Deals out of 13,991 listings starting at $1,712

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.