8 3/4 diff

I swapped 4.30's in a 489 carrier and when I tried to crush a new sleeve it would not move. I used a 1/2" breaker bar and a pipe extension with no success. I went to the shop in Kenwood, CA and talked to Joe a former Chrysler dealer master mechanic. He said take a big hammer, large pipe stub and hammer all around the OLD sleeve to extend it, so it can be reused. That was 30 yrs. ago and a spool added, and the pre-load is still at the "used pre-load" of 10 lbs?, turning the yoke nut, without a ring gear installed. So in a pinch, try the hammer tune up. Don't forget to use a nut with plastic lock, or 2, or lightly stake the stock nut at the stem edge with a point chisel.

And you're telling someone who is obviously not a master chrysler technician to take a hammer, pipe and chisel to fix this problem?????..........