I just purchased a 1995 F-150 supercab.(63,000 miles) Great truck but... when I get to HW speeds of ~70-75 I start to get a teeth chattering shake in the truck. The driver side door panel is rockin and rollin along with the seat and steering wheel's heavy vibration. RPM's don't matter from 2400 - 3500 On some road conditions it seems to get better at times. I do have a set of older snow/mud tires that I will chande out- should I also try to change out the U-joints? Anyone who has had this problem please help.

 

Check tire balance and shock wear. Has the truck even been wrecked?

-Mike

 

Thanks Mike, To my knowledge This truck has never been in a accident. There are no signs of this either.

 

Have you checked your rear diff fluid? Check it and if it needs to be replaced to it. I had to replace my u-joints on my 93, because I had a heavy foot in highschool, and liked to show off a bit, the u-joint would make a sqeaking noise when you start off or slow down under 30mph's.

 

Mine did the same thing until I got my U-Joint replaced. It was the one in the middle. Also, are the tires balanced and aligned correctly?

 

The one in the middle?

 

On your driveshaft, there are 3 U-joints, one near the axle, one near the engine where the shaft attaches, and one between the two of them at sort of a pivot point. The one near axle is the one that usually goes first.

 

That must be on manuals or something, because my 2wd F-150 has only 2. One at the pumpkin and one behind the tranny.

 

YOu must have an extended cab if you have a 2 piece rear driveshaft

 

Ford doesn't make an "extended cab," they have either regular cabs or supercabs. Extended cab is for Chevrolet/GMC. Three piece driveshafts are for long bed regular cab pickups and extended cab pickups, long or short bed. The third u-joint is on the coupling shaft that mates the driveshaft to the transmission. The ONLY thing that should be up next to the engine is the transmission. I would hope all of the u-joints are between the tailshaft of the transmission and the rear end.

 

Gmc calls theres the "club Coupe" and dodge calls theres the "club cab." If I did have 3, then howscome, when I had them replaced, the only replaced 2?

 

I think the third joint is called, the double-cardan joint. I have a 96 F150 Reg cab, and I only have a one piece driveshaft.

 

Do you have a LONG bed? Please read the entire post, it was regular cab LONG beds and supercab short and LONG beds. Pastmaster, I really don't give two sh*** what GMC calls their pickups. They could be gut wagons for all I care, point being Ford calls theirs SUPERCABS. A double cardan U-joint bolts to your transmission or transfer case regardless of what type of driveshaft you have (one or two piece). See the 1992 F Series shop manual, section 05-01. Some applications use only single Cardan type for both U-joints.

 

Fordman: Then why did you correct him when he said "extendedcab"? I have heard stretchcab, cab and a 1/2, and all kinds of sh**. everyone, including you knows what he's talking about!!!!!!!!!!!!!!

 

This site is devoted to Ford pickups, right? Ford pickups are either regular cab or supercab, but NEVER referred to as extended cab.