When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The drive shaft has a splined slip yoke at the differential end. Remove the drive shaft and lube that spline with BLUE (not green) teflon grease from FoMoCo. Expensive stuff, $20 a can if memory serves me, but it really holds up.