Replaced automatic 4WD hubs with manual locking hubs.
Required the whole front suspension including U-joints, tie rods etc. to be replaced.
Required Lucas engine treatment to quiet sticking lifters "fixed the problem".
The 1992 Explorer is a good used vehicle if the price is right. The replacement of the front end parts after 10 years is standard I'm told, the manual locking hubs in my opinion is the only way to go on any 4WD vehicle "yes it is a pain in the ass" but the difference in performance is very noticeable.
I'm having the same issue with my 93 explorer I'm in the process of converting to manual hubs. hope I see an improvement!
I have an Eddie Bauer Explorer I bought a few months ago. Without a doubt the most comfortable vehicle I've ever owned. Lots of power for city driving, uphill climbs and freeway passing and this is only a 4 liter V6. Good brakes, though mine at least do not have the usual 'Ford' grab. The only problem I've had is with the R1 5 speed manual transmission. When I got the car it wouldn't stay in fifth gear, and shifting between all gears is clunky at best. My Explorer has a tow package, so that no doubt explains the transmission woes. Just love the car, and will save my dimes to by a new one!