Tranny won't shift.

1,315

Asked by Feb 04, 2014 at 12:02 AM about the 1986 Ford F-150 STD Standard Cab 4WD LB

Question type: Maintenance & Repair

A friend of mine took a brand new AOD transmission and bolted it to a 94 Ford 351.
Everything bolts up and lines up correctly. Heres the problem. It won't shift. The TV
linkage is set to perfect 0's and everything has been rebuilt, and installed. But the
problem is, is it won't shift. I need details Any ideas would be great.
Again, its a  86 f150 with a AOD trans and w/ a 94 351 in it and the trans won't change
correctly. changed over new fly wheels and rebuilt the trans but still won't change right

3 Answers

70,255

Is the tranny for an '86 model or a '94 model? The '86 model would have a vacuum modulator controlling the shift points. The '94 model is probably electronic. The vacuum modulator has a vacuum hose going from the intake manifold to the vacuum modulator on the side of the transmission. Without this hose hooked up it won't shift out of first. Same is true if it's electronic. If you can't plug it in to an onboard computer, it won't shift either. HTH. -Jim

1 of 1 people found this helpful.
21,325

good answer jim

1 of 1 people found this helpful.
19,235

if it was electiric it would be an AODe or E40d. It would default to 2nd or 3rd gear without input. I thought the vacuum modulator would just lengthen shift times. Without it it sould still shift just real late like you were flooring it. Sounds like governor pressure isnt building or something went wrong with the rebuild

1 of 1 people found this helpful.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 182,094 nationwide F-150 listings starting at $1,000.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,910
  • #2
    dandyoun
    Reputation
    4,540
  • #3
    tennisshoes
    Reputation
    3,060
View All

Related Models For Sale

Used Ford Mustang
713 Great Deals out of 38,301 listings starting at $895
Used Ford F-250
471 listings starting at $6,694

Used Cars For Sale

2018 Ford F-150 For Sale
30,907 listings starting at $20,990
2017 Ford F-150 For Sale
117 Great Deals out of 81,065 listings starting at $17,990
2016 Ford F-150 For Sale
126 Great Deals out of 7,670 listings starting at $18,989
2015 Ford F-150 For Sale
302 Great Deals out of 10,610 listings starting at $14,999
2014 Ford F-150 For Sale
433 Great Deals out of 13,784 listings starting at $10,995

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.