well my f150 is starting to act up... when i accelerate the rear axle makes noise.. it sounded like a broken spring in the drum at first so i went ahead and did a break job... about a year over due... didnt solve the problem which i figured it wouldnt when i noticed there were no broken springs. further looking the rear u-joint on the driveshaft looks pretty bad... i can see that the bottom of the cap is broken.. i have goosed on it quite a bit since it has started making this noise to help it break... but it hasn't... i am gonna replace the u-joint today but i really dont think it could make this noise... if it continues after i change it maby someone wants to go on a ride with me and hear it cause i cant think of what it would be.