Mechanics

JERKS WHEN SHIFTING

1988 Ford F-150 • 75,000 miles

My 1988 Ford F-150 clunks and jerks when shifting into and out of Overdrive (automatic transmission.) All other up shifts and downshifts are normal.

The problem seems to happen at all speeds.
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Lynngrim
July 10, 2012.




CHECK THE U JOINTS AND THE TRANS MOUNT

Cadieman
Jul 10, 2012.
The ujoints don't clunk and the transmission doesn't jump when I change from Drive to Reverse, or Reverse to Drive.

Tiny
Lynngrim
Jul 11, 2012.
Sorry I seam to have dropped your question. This seams to be a internal problem in the trans. Its more noticed when your at higher speeds. Youll need to take it to a trans shop and let a specialist drive it. Fyi you only test the motor mounts with the rev to drive test. Use a pry bar to check if the trans mount is broken and u joints can clunk if they get bad enough. Ty for using 2carpros
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Cadieman
Aug 8, 2012.
I have replaced the Throttle Position Sensor and the transmission now shifts 3-4 and 4-3 mormally.

Tiny
Lynngrim
Aug 8, 2012.
Lynngrm thank you for letting us know what the fix for your problem was. We appreciate you letting us know.

Rivermikerat
Sep 7, 2012.

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