M1008 gear oil type 14-bolt

86 K30, M1008… what type rear axle gear oil to use?? Jump to Latest Follow 1 – 2 of 2 Posts … Joined Jul 10, 2008 · 77 Posts . Discussion Starter · #1 · Jul 19, 2008. 1986 K30 ex army truck with 14 bolt detroit locker. Im checking brakes, wheel cyls, repacking front brgs, and changing all fluids tomorrow. What gear lube should I use in that rear? Does it need any …

FAQ m1008 gear oil type 14-bolt

Which gear oil is best for a 14 bolt axle?

Wondering which gear oil is best for your 14 bolt axle? You’re not alone – it’s a common question, and the answers you’ll find online are all over the map. Many people recommend 80W-90 or 75W-90, but we have found that the best gear oil for the 14 bolt axle is 75W-140.

How much oil do you put in a 14 bolt differential?

The gear oil capacity of a 14 bolt axle is either 3.6 quarts (full float) or 2.75 quarts (semi-float). However, when it’s time to fill the axle, don’t try and measure out the fluid. Instead, just fill the differential slowly, and stop pumping gear oil in when fluid comes out the fill hole.

Is 75W-140 gear oil good for gear?

75W-140 gear oil is a good option for a wide range of temperatures. Unlike 80W-90 or 75W-90, 75W-140 offers protection at both colder temps (75) AND fairly high temps (140). While gear oil shouldn’t spend a lot of time at very high temperatures, it’s good to have protection in those scenarios.

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What is the size of the 14 bolt gear?

GM 10.5″ 14-Bolt Gear Install and Setup By Bill “BillaVista” Ansell Photography: Bill Ansell Copyright 2005 – Bill Ansell (click any pic to enlarge) Introduction