rear differential capacity

monty1982 · 07-18-2008, 12:18 AM

Hi there I am planning to drain and fill my rear differential on my 2000 gmc sierra 1500 4x4. It is the newer body style with 3.73 gears. I know it has a tag on the side of the diff that says fill to 15-40 mm below fill plug with 75w90 synthetic gear oil. How much oil would I need to buy to do a proper drain/fill service?
Thanks

Triple-X08 · 07-19-2008, 12:54 AM

roughly 2 bottles of synthetic 75w 90. make sure its synthetic, it has a posi unit it needs synthetic fluid. especially if it has the tag on it.

depending on if your doing a complete service, you may want to get 3 full bottles, just to be safe. but on average it seems about 2 bottles will do.

fill it up, put your pinky in the hole, and feel for fluid, if you can feel fluid, then your good to go.

**nailhead425** · 07-19-2008, 03:13 AM

Yup, 4.5 pints.

07-18-2008, 12:18 AM	#1 (permalink)
monty1982 Walking Join Date: Jul 2008 Posts: 4	rear differential capacity Hi there I am planning to drain and fill my rear differential on my 2000 gmc sierra 1500 4x4. It is the newer body style with 3.73 gears. I know it has a tag on the side of the diff that says fill to 15-40 mm below fill plug with 75w90 synthetic gear oil. How much oil would I need to buy to do a proper drain/fill service? Thanks

07-19-2008, 12:54 AM	#2 (permalink)
Triple-X08 5.3 Liter Vortec V8 Join Date: Apr 2005 Location: Michigan Drives: 2007 Saturn Ion, 83 Camaro Posts: 1,477	Re: rear differential capacity roughly 2 bottles of synthetic 75w 90. make sure its synthetic, it has a posi unit it needs synthetic fluid. especially if it has the tag on it. depending on if your doing a complete service, you may want to get 3 full bottles, just to be safe. but on average it seems about 2 bottles will do. fill it up, put your pinky in the hole, and feel for fluid, if you can feel fluid, then your good to go. __________________ ASE Master Certified Technican current cars in garage- 07 Saturn Ion - daily driver 83 Camaro Z28

07-19-2008, 03:13 AM	#3 (permalink)
nailhead425 GMI Staff Member Join Date: Jan 2005 Location: 85541 Drives: '01 Dodge, '88 3/4T Sub, 3-Nailhead Buicks, Monte Posts: 2,367	Re: rear differential capacity Yup, 4.5 pints. __________________ "A foolish consistency is the hobgoblin of little minds."-Ralph Waldo Emerson

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