[kjp]

OK - same noise when turning either way. On load - most noise/vibration when de-accelerating, some on acceleration, but not much. Thicker oil 80-120W in the diff has seemed to quiet it down a good bit compared to the normal 80-90W.

I have a chance to pick up either a used '79 or a '86 rear end. Both are LSD. Different axle ratios, 4.56 and 4.10.

The 4.10 should give a bit more top end, how can speedo accuracy be maintained with the 4.10 if I go that route?

Thanks,