Upon installing my 1310 to 1350 U-joint I noticed the caps could be spun with some up and down movement at the rear joint. Last summer I put a new front tranny yoke and new joints front and back. It looks like the back may have worn some. How? Anyway My driveshaft shop said between $100-$170 to replace the rear of the driveshaft yoke, new joint and balance. I guess thats a ok price. Well looks like more money........