Hello all. I have an unusual squeak in my 2002 Ford F150 4.6, 100k

It's a manual transmission and only happens when:

1) Going in reverse
2) Decelerating while in gear
3) Hear it slightly while accelerating

I do not hear it if I throw it in neutral and rev. the engine. Sounds like a serpentine belt, but only during the times mentioned above so it can't be.

No other vibrations, maybe a u-joint or similar?

Thanks for your help

 

No ideas?

 

sounds like a u-joint to me but not positive....you should be able to put truck in neutral (block wheels first) then climb under truck and grab the driveshaft and try to move it up and down and around....if there's play anywhere then its a u-joint but if not not to sure.hope this helps

 

I was thinking U-Joint too, but have no vibration at all. Maybe it's just a sign the bearings are dry/starting to fail, which will eventually lead to a bad U-Joint.

 

Had tghe same problem it was the U joint. Mine didnt have grease points on it so I order and aftermarket one that did. Now I grease it when I change the oil sounds better and the drive shaft is lighter so it isnt as much of a strain

 

The other aspect I would look at are the brakes. I have heard of others having similar symptoms with due to brake problems. I believe one chap had a problem with a caliper...

 

i had the u-joint go out. it makes a squeek when you go in reverse.

 

Well, not sure if it was a coincidence or not but my brakes locked up this morning in reverse. I'm assuming this was the squeak... I'll post back with my results for anyone following this thread.

 

Well it was just a coincidence. My emergency brake shoes broke and locked everything up. Still have the squeak though so I'll replace the U-Joints and post back.

 

Had the exact symptoms in my 97 4.6, two $18.00 U-joints from O'Reilly's solved it. That is a 12 point 12 mm socket.