Differential cover bolt torque specs

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

adventurenali92

Full Access Member
Joined
Feb 16, 2015
Posts
7,339
Reaction score
8,517
Location
Big Bear Lake, ca
Hey guys! 2006 Yukon XL Denali AWD is what I’m working with.
Searched around and couldn’t find precisely what I’m looking for. Lots of other models year specs but can anyone provide proper torque specs for the bolts holding cover to rear differential to housing? Mine were loose today and a small amount dribbled out, maybe less than a 1/4 of a quarts worth over I’m guessing the last few days. Cranked the bolts down but wanna torque them proper so they don’t come loose again. And waiting for it to cool down so I can pop the fill plug and top it off.
 

swathdiver

Full Access Member
Joined
May 18, 2017
Posts
19,555
Reaction score
26,188
Location
Treasure Coast, Florida
I've seen specs all over the place in GM manuals depending on the year and how much coffee the engineers had that morning. 20-30 foot pounds.

My 2009 calls for 29 foot pounds and the 2013 calls for 20 foot pounds for the same bolt on the same axle with the same gasket. Pick one or split the difference and call it good.
 

West 1

Member
Joined
Jan 20, 2023
Posts
61
Reaction score
92
I choose to use silicone on the differential covers. Tighten the bolts snug and call it good. The silicone works like a thread lock so they never come loose. In 30 years only one leaked and that was because I hit the cover with the edge of my floor jack and bent the cover. Duh. Should have been more careful. I have the Fel Pro Gasket on my shelf, I prefer the silicone to seal differentials. The factory did it for years. It works. I hand torque the bolts using my 3/8" ratchet. Tightening a thin Metal Diff cover I see no reason to torque it. Chris cross pattern to tighten, absolutely, you never want to tweak or bend the cover. Having torqued hundreds of other jobs I would guess I am close to 20 ft pounds final torque. I would be afraid to go to 30 pounds with those small bolts. If it was a cast aluminum cover I would have my Torque wrench out using it.
 

swathdiver

Full Access Member
Joined
May 18, 2017
Posts
19,555
Reaction score
26,188
Location
Treasure Coast, Florida
Tighten the bolts snug and call it good. ...I hand torque the bolts using my 3/8" ratchet. ...Chris cross pattern to tighten, absolutely, you never want to tweak or bend the cover. Having torqued hundreds of other jobs I would guess I am close to 20 ft pounds final torque.

Don't recall ever using a torque wrench on them; just a good yank on each one. Probably about 20 foot pounds too.
 

Forum statistics

Threads
131,339
Posts
1,849,298
Members
95,393
Latest member
Budzy24
Top