Done yesterday. It took less than 4h (total – even with changing information center’s connections). Probably because it was direct swap. When I was looking for replacement I clearly stated that I need a NP242J from Grand Cherokee with 42RE transmission. Thanks to that everything worked like a charm.
First impressions very positive – the car is more quiet, mileage went up about 3mpg in 2WD and last but the most important – due to locked visco it was impossible to do almost any maneuvers on the concrete parking lot – now it works. I hope it will save me huge amount of bucks on front differential replacement.