4 3/4 bolt pattern - The 1947 - Present Chevrolet & GMC Truck Message Board Network

camaro41701 · 10-14-2010, 05:11 PM

I have a 72 C10 rear that has 4 3/4 bolt circle.The axles or drums have not been drilled.What is it?

jibs · 10-14-2010, 07:18 PM

4 3/4 bolt circle is GM mid size 1950's thru 1980's, chevelle, camaro, skylark, 442, GTo etc. Easy pattern to get wheels for. JJibs

CE20934 · 10-14-2010, 07:30 PM

It was also used on S10s, Astros, and box Caprices ('77-'90).

69 longhorn · 10-14-2010, 07:51 PM

Quote:

Originally Posted by camaro41701

I have a 72 C10 rear that has 4 3/4 bolt circle.The axles or drums have not been drilled.What is it?

if its a 12 bolt truck style rear, it could be from a late 60's/early 70's VAN. The early vans had a 4 3/4 " bolt circle. crazyAL

camaro41701 · 10-14-2010, 08:52 PM

Rear is out of a truck unless some of the vans were Trailing arm.The housing has never been cut or welded on.If this is a van.What 5 inch bolt circle axle would fit?
I want to use this rear in my truck because of ratio and the housing is real nice.

raycow · 10-15-2010, 02:06 AM

Could it be a normal 12 bolt with aftermarket shafts? I believe you can order custom shafts with any reasonable bolt pattern.

Ray

foxhole · 10-15-2010, 02:51 AM

Quote:

Originally Posted by CE20934

It was also used on S10s, Astros, and box Caprices ('77-'90).

astro vans were 5 on 5 like the half tons and big cars.

69 longhorn · 10-15-2010, 03:11 AM

Quote:

Originally Posted by camaro41701

Rear is out of a truck unless some of the vans were Trailing arm.The housing has never been cut or welded on.If this is a van.What 5 inch bolt circle axle would fit?
I want to use this rear in my truck because of ratio and the housing is real nice.

No, the vans were all leaf , & the ones I have run across have a smaller (Nova/Camaro) drum setup. It could be as already mentioned, aftermarket axles. Just a ? tho.....when you measured the bolt circle, did you measure from center of 1 stud, the the "imaginary center" tween 2 studs directly opposite of the 1st one? Im not trying to be goofy, but if you measure from 1 stud to the next one that is farthest away.....you measure will come up about 1/4" short

crazyAL

LONGHAIR · 10-15-2010, 07:40 AM

69 longhorn is correct, many times this is mis-measured.

10-14-2010, 05:11 PM	#1
camaro41701 Registered User Join Date: Oct 2007 Location: Hazard,KY Posts: 40	4 3/4 bolt pattern I have a 72 C10 rear that has 4 3/4 bolt circle.The axles or drums have not been drilled.What is it?

10-14-2010, 07:18 PM	#2
jibs Registered User Join Date: Jul 2009 Location: Canonsburg, PA Posts: 31	Re: 3 3/4 bolt pattern 4 3/4 bolt circle is GM mid size 1950's thru 1980's, chevelle, camaro, skylark, 442, GTo etc. Easy pattern to get wheels for. JJibs

10-14-2010, 07:30 PM	#3
CE20934 Senior Member Join Date: Apr 2002 Location: Help! I'm in an office park with its own network of freeways! Posts: 470	Re: 3 3/4 bolt pattern It was also used on S10s, Astros, and box Caprices ('77-'90). __________________ '67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man) '95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis) '07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. fingers crossed

10-14-2010, 08:52 PM	#5
camaro41701 Registered User Join Date: Oct 2007 Location: Hazard,KY Posts: 40	Re: 3 3/4 bolt pattern Rear is out of a truck unless some of the vans were Trailing arm.The housing has never been cut or welded on.If this is a van.What 5 inch bolt circle axle would fit? I want to use this rear in my truck because of ratio and the housing is real nice.

10-15-2010, 02:06 AM	#6
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: 3 3/4 bolt pattern Could it be a normal 12 bolt with aftermarket shafts? I believe you can order custom shafts with any reasonable bolt pattern. Ray



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