Replaced pinion seal, leaking again. Also, rear axle running temp?
In the last 10K miles or so, I replaced the transmission output shaft seal and bushing, and the pinion seal. (The worn bushing was causing a drivetrain vibration.) The transmission repairs have held, but the pinion seal is leaking again and there is a small amount of drivetrain vibration. Is there a bushing at the pinion that could be worn that's causing the seal to leak? If so, what's involved with replacing it?
(Note that the car has a Denny's aluminum driveshaft and 4:10 gears. The car currently has 145K miles.)
On a side note, how hot should the rear axle get during extended 90mph interstate drives? I noticed some warmth on the inside of the cabin above the rear axle, and my heat gun says that the external temp of the rear axle is around 150F when measured a few minutes after parking the car.
--'94 Caprice "SS" wagon, 0.30 over, high-volume oil pump, LT4 hot cam, 1.6:1 rockers, ported aluminum Corvette heads, shorty headers, PCM4Less tune, 4.10s, shift kit, side-exit dual exhaust with Flowmasters, OR X-pipe, F-body gauge cluster, Bonneville front and rear seats (working electrics), Bravada console shifter, Bilsteins, 12.7:1 Impala steering box, Boss 338s with 255/45R20s, bunch of other stuff I'm forgetting.
--'04 Mustang Cobra, '15 Audi S4
--1125R, 1050, VMax, VFR800, DRZ-400E