Question: how do i know if i need to replace my u joints?
Answer: Squeaking noise when starting to move (forward or reverse) ... 
“Clunk” with a ringing sound when shifting from Drive to Reverse. ... 
Vibration felt throughout the vehicle while moving forward at speed. ... 
Transmission fluid leaks from the rear of the transmission. ... 
Vehicle cannot move under its own power; driveshaft dislocated.