Quote:
Originally Posted by PeteVS
I put an aftermarket ring and pinion in a '48 rear. Only problem I had and I found out afterwards is that the two bearings on the pinion go on differently. The first should be, and it was, a nice press fit. The second, and it wasn't, is supposed to be a very close slip fit. The problem manifested itself in trying to set the preload. Because the second bearing was a press, it would "jump" small amounts as I was pressing it. First, there'd be very little preload, press a bit more, the bearing would jump a couple of thousandths and then, there'd be too much preload. I finally go it good but it would have been nicer if I had just taken a wee bit off of the "outer" end of the pinion shaft.
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What I usually do is polish the pinion shaft then completely seal up the bearing with duct tape except for the I.D. And use a flapper wheel to polish the inside untill I get a slip fit on the pinion. The genuine Ford pinion bearings has one that's marked with a "P" and that's the one that goes on first and the other has a slip fit. It's almost impossible to achieve proper preload when the outer bearing is tight , it creates erroneous readings.