Trans and Rear Diff Oil

[plym_46]

http://benchmarkworks.com/articles/tech/gearoil.html

regarding sulphur compounds,  if the lube has no sulphur should be good to go.

[TodFitch]

modern hypoid oils are not white metal friendly, our synchros, balking gears and some other stuff are brass and bronze.  So you need something rated GL 3 or lower for the trans.  Diffy's aren't as fussy.

The container of Sta-Lube SAE 140 Multi-Purpose Hypoid Gear Oil in my garage says, among other things:

Not corrosive to copper, bronze, or other non-ferrous alloy bearings and bushings.

I think the canard that hypoid gear lube is not compatible with brass and bronze is from decades ago when different high pressure additives were in use.

[plym_46]

modern hypoid oils are not white metal friendly, our synchros, balking gears and some other stuff are brass and bronze.  So you need something rated GL 3 or lower for the trans.  Diffy's aren't as fussy.

[Go Fleiter]

Service manual suggests
Transmission: fluid gear lubricant FGL SAE 80
rear axle: Hypoid gear lubricant HGL SAE 90

As of the pics in my manual, You should find bolts plugging drain holes on both assemblies.
Trans: right side, near the cluch
Differential: right side, back in the axle housing (not in the Diff carrier)

Greetings from D?sseldorf! Go
                                                                                                                                                                                                                                                                                   

[DENNIS P NOLAN]

I have a '39- P-8 and am changing the trans oil and the rear end oil- what can I use?90W Hypoid-?? what in the trans and what in the rear diff-?-..I also understand that they take approx a quart each-?- In draining the rear diff- just loosen a couple of the bottom screws on the rear differential plate-? as opposed to vacuuming it out-??
Thanks,
Dennis