my cousin has a 97 tj 4cyl 5spd with a 3" bodylift and 33's.it has stock gearing or did but we have just pulled the third set of spider gears it has eat up in a year and half.one was a factory replacement and two were rustsy off road.it dosent have a locker and dosnt pop or make noises(untill it throws the spiders).i know the first was from dumping the clutch but the three weve replaced were from normal driving.does anyone know what could cause this?i would appreciate any help thanks  

Not sure but could it have something to do with the stock gears trying to push 33's?  That's alot of tire for a 4 cyl with stock gearing.  Would stepping up to maybe 4.88's in the diff's help?  It should help you get back to near stock performance.  

yea the 33 would be a big problem. i busted mine too front and rear blew holes through the diff covers. im running 31's and the 4.0.  

the carrier may be cracked, or it just sees a little abuse even on the hwy, an lsd carrier is stonger, you can check into a super kit for the 35 or find a d44 from a sahara or sport model. 97-06 will bolt in.  

from what ive read starting in 2000 the 44 was an opt in the wrangler sport. too bad who ever ordered mine didnt order the 44.