72 c10 Rear Dif gear options - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Clyde65** · 12-13-2010, 03:53 PM

I have a 72 C10 12bolt rearend under my 65, I had it rebuilt a year or so ago and stuck with the 3.08 gears, what can i put in there without changing the housing? 3.42\3.73?

Thanks guys.

GobbleStalker · 12-13-2010, 04:08 PM

I think you can do both. Check with Randy's Ring & Pinion.

allengator · 12-13-2010, 04:11 PM

It is my understanding that 3.xx gears will all go into the same housing...

raycow · 12-13-2010, 04:18 PM

You can put any 12 bolt gears in the housing. However, if you want to keep your present differential case you can use OE type gears only up to 3.42. For anything numerically higher you have to use a special aftermarket gear set with a "thick" ring gear or a ring gear spacer, which some people advise against. I am neutral on the spacer.

Ray

12-13-2010, 03:53 PM	#1
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,541	72 c10 Rear Dif gear options I have a 72 C10 12bolt rearend under my 65, I had it rebuilt a year or so ago and stuck with the 3.08 gears, what can i put in there without changing the housing? 3.42\3.73? Thanks guys. __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

12-13-2010, 04:08 PM	#2
GobbleStalker GobbleStalker Calls Join Date: Aug 2010 Location: Port Hope, Ontario Posts: 653	Re: 72 c10 Rear Dif gear options I think you can do both. Check with Randy's Ring & Pinion. __________________ 72 Chev Longbox Highlander edition. Med Olive/White/ Med Olive 350 4bbl with 350Turbo trans. Truck currently under construction. Project Cappaccino. Stay Tuned! 1967 Chevy C10, 327, 4.11 posi 3 spd. The Driver Truck! SOLD! 09 GMC Sierra SLT All Terrain pkg. 2014 Jeep Wrangler Sahara unlimited. ( The wifes ride )

12-13-2010, 04:11 PM	#3
allengator Registered User Join Date: Dec 2010 Location: Burleson, Texas Posts: 596	Re: 72 c10 Rear Dif gear options It is my understanding that 3.xx gears will all go into the same housing... __________________ Allengator Outta the Blue (my band - available for hire in the DFW area!) 1980 Chevy SWB Pickup (build thread) 1951 Chevy Sedan Delivery 2004 Chevy Tahoe Z71 2011 Harley Davidson Street Glide 2018 Silverado Z71 Crew Cab

12-13-2010, 04:18 PM	#4
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: 72 c10 Rear Dif gear options You can put any 12 bolt gears in the housing. However, if you want to keep your present differential case you can use OE type gears only up to 3.42. For anything numerically higher you have to use a special aftermarket gear set with a "thick" ring gear or a ring gear spacer, which some people advise against. I am neutral on the spacer. Ray __________________ Live more responsibly. Eat lower on the food chain. Eat vegetarians.



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