I think I have a rear axle bearing going out, So I have been doing some research on the non adjustable Green bearings. Green is actually the name of the company that makes them. They have been bought out by another company, but still retains the Green name .
My best source of Info is from Dr. Differential tech article. ( who could be better??) The early bearings are RP 400 and have a crimped on 5 hole retainer which will not allow for any "wiggle" in the bearing . Most axle housings , even new ones are not perfectly straight. and between tha,t and those bearings are inserted in the housing deeper, results in pre-loading against the thrust block, and can lead to early bearing failure. So-- that must be the reason for the pros and the cons. Those bearings are still being sold by some sources including Mopar Performance parts ( alledgedly)
Now, there is a newer style "Green" bearing, # MO 400 that is installed with a snap ring and supposedly has taken care of the problems the older bearings (has)- had.
In the past, I have been against the use of Green bearings, but with ease of installation, I just might give them a try. ...................................MO
