I'm replacing the pinion seal on the 8.5 inch 10-bolt in my '69. I was wondering what tool people here have used to pull the flange back onto the pinion splines. The '69 chassis manual I have calls out a special tool, but I think this would be for the 8.2 inch rear axle. Anyone know if this tool also works for the 8.5 inch, or do I need a different tool?
Most of the time when changing a pinion seal a impact wrench is good enough for tightening the pinion nut. Most 1/2 inch drive impact wrenches are strong enough to get the nut tight without colapsing the spacer any more. The tool for holding the pinion yoke is used when you have the differential out of the rear end. The ring gear should hold your pinion still while you tighten the nut if you set the parking brake. Use a new pinion nut and put a few drops of red Lock Tight on the threads when you put it back on. Put some RTV sealant on the splines in the yoke before you put it on so oil doesn't seap out around them. Also put some RTV around the seal before you drive it in and put some grease on the seal to lube it.
'69 RS/SS396 pro street
High Performance Drive Train Parts And Service www.lubedealer.com/biggearhead