hey guys, got a weird prob with 4r( 99 with 140k) when i put it in reverse to back up to my trailer yest i noticed a squeaking noise, kinda like a bed squeaking. it only does it in reverse. something else i noticed about the squeak, when im backing up and put it in neutral and continue to roll backwards the squeaking stops the moment the 4r goes into neutral, what could be going on here?

 

u-joint

just had the same exact problem. at $15 a pop, it is probly worth it to replace both of them at this point.