pdxrovermech said:
thats something that really depends on the owners driving style and how well it stays lubed. I have over 200k on my rig and have yet to break a CV and then I have a costumer that seems to break a CV every 5th time he goes wheelin cause hes hard on the throttle. As far as daily driving wear goes, the most important thing is keeping it properly lubed with either 90W or my preferred grease pack. A grease pack will minimalize swivel ball leaks and just generally last longer.
I've got 230K on a set in a '95 Disco that has been wheeled heavily.
I'm a 90 wt man though (I'm a Dapper Dan man, dammit!).
If you keep the water out, oil in and don't hammer on them, they'll last the life of the truck.
That said, I have replaced everything but the block on this truck. The CVs and the block are the only parts that haven't worn out completely. You should hear a transfer case that was run dry at 200K, along with both diffs at 200K+, the din is very unpleasant!