Hey guys, i have a 3 inch lifted cherokee sport with 31 inch tires. ive had some major recurring issues with my front driveshaft and front differential. its seems as though the lift is pulling on the front driveshaft and causing the seal of the differential to break and the gear oil to spill out. i bought lower adjustable control arms for this problem. however a few months later im having the same problem. i dont know what else to do. i know my cherokee vibrates like a jackhammer over 65 that could be shaking the driveshaft and putting more stress on it. any input would be helpful.

 

Not possible unless your pinion nut is spinning freely. The pinion and therefore the yoke cannot move forward or aft when properly installed.

Improperly installed and your diff would grenade as the pinion moves forward.

Replace the seal and see if the spring is still in place on the current seal.
Check for excessive wear (grove) on the pinion seal surface.

 

Google death wobble.