I get up to around 35 to 40 mph the truck shakes?

BJS82

MEMBER
FORD F-150

I have a 1993 F150 with the 4.9 straight 6 auto trans with 84000 miles on it. The issue is when I am driving as I get up to around 35 to 40 mph the truck shakes. If I slow down some it stops if I speed up it will do it again but it wont do it all the time. What could this be a transmission problem or something else?

Monday, January 16th, 2006 AT 10:43 PM

4 Replies

DB554

MECHANIC
35 POSTS

It could be the u joints

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Tuesday, January 17th, 2006 AT 3:36 PM

DUDE

MEMBER
50 POSTS

:roll: Ball joints worn?
Used to get those symptoms with king pins

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Wednesday, January 18th, 2006 AT 3:20 AM

LOVESCARS

MECHANIC
359 POSTS

If your truck has a split driveshaft it's likely might be carrier bearing if not you can check the play in the rear differential.
Perform these checks if the issue does not affect the steering wheel.

Pud

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Wednesday, January 18th, 2006 AT 8:42 AM

HEAVNZ_WARRIOR

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8 POSTS

Have you changed the transmission fluid lately? I know in my tbird it would do the exact same thing. They told me that it was breakdown of the tranny fluid. As soon as I got it changed it did it once more and hasnt done it since.

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Thursday, January 19th, 2006 AT 5:14 AM