OEM 12 bolt diff cover - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**geunther** · 03-14-2016, 05:17 AM

My diff cover had been overtightened..a lot. To the point that you can see the bolt shoulder circle imprinted on the inside of the cover. Some of the shoulders had cut into the cover. I can spend some time hammering it back into shape but with the cutting into the cover, I think its better to replace.

Anyone know of a good source? Ive looked at all the typical sites already. I can't find any with the factory raised ribbing between bolt holes, and the curled back flange. No decent junk yards in the area.

**Grumpy old man** · 03-14-2016, 06:51 AM

Post a Want to buy ad in the classified or drive line forums .i'm sure someone must have an extra or two .

Andy4639 · 03-14-2016, 02:46 PM

I just bought this one.

Chevy/GM Truck 12 Bolt Chrome Steel Rear Differential Cover 8.75" Gasket & BoltsChevy/GM Truck 12 Bolt Chrome Steel Rear Differential Cover 8.75" Gasket & Bolts

http://www.ebay.com/itm/331099600312...ht_2465wt_1124

68Gold/white · 03-14-2016, 03:19 PM

There are aftermarket covers available. If you decide to go that direction, beware, the 12 bolt truck covers are different from the car units.

**geunther** · 03-14-2016, 04:42 PM

Posted a WTB in classifieds. Trying to keep it original. Aware of the difference between trucks and cars but would rather be told 100 times than not know. That would have been frustrating to have bought one of those by mistake.

03-14-2016, 05:17 AM	#1
geunther Senior Member Join Date: Apr 2005 Location: Cheyenne, WY Posts: 740	OEM 12 bolt diff cover My diff cover had been overtightened..a lot. To the point that you can see the bolt shoulder circle imprinted on the inside of the cover. Some of the shoulders had cut into the cover. I can spend some time hammering it back into shape but with the cutting into the cover, I think its better to replace. Anyone know of a good source? Ive looked at all the typical sites already. I can't find any with the factory raised ribbing between bolt holes, and the curled back flange. No decent junk yards in the area. Last edited by geunther; 03-14-2016 at 05:28 AM.

03-14-2016, 06:51 AM	#2
Grumpy old man Senior Member Join Date: Dec 2013 Location: Gods country East,Tn Posts: 8,545	Re: OEM 12 bolt diff cover Post a Want to buy ad in the classified or drive line forums .i'm sure someone must have an extra or two . __________________ 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop

03-14-2016, 02:46 PM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: OEM 12 bolt diff cover I just bought this one. Chevy/GM Truck 12 Bolt Chrome Steel Rear Differential Cover 8.75" Gasket & BoltsChevy/GM Truck 12 Bolt Chrome Steel Rear Differential Cover 8.75" Gasket & Bolts http://www.ebay.com/itm/331099600312...ht_2465wt_1124 __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

03-14-2016, 03:19 PM	#4
68Gold/white Registered User Join Date: Sep 2011 Location: Ark City, Kansas Posts: 3,387	Re: OEM 12 bolt diff cover There are aftermarket covers available. If you decide to go that direction, beware, the 12 bolt truck covers are different from the car units.

03-14-2016, 04:42 PM	#5
geunther Senior Member Join Date: Apr 2005 Location: Cheyenne, WY Posts: 740	Re: OEM 12 bolt diff cover Posted a WTB in classifieds. Trying to keep it original. Aware of the difference between trucks and cars but would rather be told 100 times than not know. That would have been frustrating to have bought one of those by mistake.

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