Senior Tech Team
Join Date: Jun 2007
Location: Just a way North of Atlanta
12 bolt Refresh Questions
Had a few questions. Looking for someone experienced to respond.
Stock posi 12 bolt in 1970 Chevelle unless welding the tubes to the pumpkin is not stock. 3:31 gears to the best of my knowledge and passed the eyeball test of axle turns, vs. driveshaft turns etc. to verify.
I don't think it's ever been rebuilt. When I pulled the brakes and axles to remove the backing plates, there was some dried up remnants of gear lube in there, brakes were shot, completely shot. Can't figure out why they put on new drums, but they were in nearly new condition.
The ring and pinion wear look great, the pinion seal did not seep even a drop after driving and then sitting for months, and there is not noticable play at the axles, pinion, or slop in the gears.
Doesn't seem to need much, so before throwing money into something that doesn't seem to need it so my plans are to replace the axle bearings and seals, and button back up. I'd like to install a nicer rear cover too. I like the Moser unit, but as I will basically be installing for looks alone, anyone have experience with the Summit version and/or the Moser?
But I am not sure of the axles. I would like to get an axle diameter measurement to compare to what's there now. If they have worn too much, I'd rather spend a few hundred to do that on top of bearings and seals so I don't begin dripping axle seals after a few hundred miles.
Any rear end specialists that can throw some feedback, specific or in general and provide the axle diameter? Any guidelines to fluid and additives?
Thanks in Advance!