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Are the NP 420-435 transmissions supposed to take the same gear oil (90W/80-90W) as the diff? Noticed the the "Hypoid gear lube GL5", has Sulphur that can cause corrosion of brass parts, synchros, etc. NAPA dude in town can'r shed any light on it, says "use the same in everythin
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Re: Gear oil, Dana 60 yoke, U joint strap lockwasher questions
Posted by:
Kaegi
(24.113.81.---)
Posts: 781
Posts: 781
Date: August 29, 2009 01:27PM
Run GL4 in the trans and Tcase if 4x4, and run it in diffs if they do not have clutch type limited slip spools. that is what the book calls for. GL5 is for limited slip type differentials and why it exists. I have run GL5 in open diffs before and noticed it tends to thin out more with heat than the GL4 does.
my 61 has lock waahers on the ujoint straps.
my 61 has lock waahers on the ujoint straps.
