Compression Ignition Addict
Join Date: Oct 2011
Location: Chico, California
Thanked 233 Times in 224 Posts
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i just went with valvoline synthetic gear oils, i know everybody loves amsoil and shaeffers but i just bought what napa had.
rear diff is 75-140 full synthetic, most of the gear oils have a friction modifier already added. if not youll need to add some to the rear.
then the front is either 85w-90 or 75w-90 i cant remember the tag should say on the diff cover.
the front does not require synthetic gear oil or a friction modifier.
and the trans case is the easiet to do!
2 quarts of atf, make sure you take the top plug out before you take the bottom plug out. i took the bottom plug and drained it only to find the top lug was stripped!
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99.5 f250 7.3 4x4 260k FF 160/30, PHP Hydra, S&B CAI, 4" Exhaust, RR Billet Wheel, Autometer Gauges, Transgo, Non-Ebpv Pedestal, High Flow Outlet, 08 Tow Mirrors.
Dad-2000 7.3 4x4 110k miles, Autometer Gauges, Superchips 1705, 6637, 4" Exhaust, BD Billet Wheel, TruCool Max