Trans won't shift to high or overdrive

Asked by Sep 06, 2017 at 12:47 PM

Question type: Maintenance & Repair

My truck won't shift into high gear or
overdrive. It's a 1993 Chev pick up. 4x4.
The Trans is a 64ld.

1 Answer

3,115

Check the fluid level to be sure it is full. Also check the vacuum hose that goes to the trans modulator. Shifting is controlled by vacuum and if the hose is cracked (not getting vacuum), the trans will not shift. Can you manually upshift using the gear selector (start in L or 1, shift to 2, then D)?

Your Answer:

Maintenance & Repair Experts

  • #1
    dandyoun
    Reputation
    107,280
  • #2
    tennisshoes
    Reputation
    98,400
  • #3
    tenspeed
    Reputation
    85,240
View All

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.