axle width - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Purs · 01-06-2005, 12:23 AM

Can someone please give me a total width for a '68 12 bolt and also a '71-'72 12 bolt. Aren't the later model rears slightly wider? Thank you.

Vince M · 01-06-2005, 10:49 AM

71-72 = 63 5/8" hub to hub.

Purs · 01-06-2005, 06:14 PM

by hub do you mean the outside (wheel mounting surface) of the brake drum?

flatblack67c-10 · 01-06-2005, 08:30 PM

The later ones are 1 inch wider on each tube, don't know measurement right off hand.

Vince M · 01-06-2005, 09:06 PM

The dimensions I gave are from the axle face to axle face. I forgot that I'm running discs and I didn't have the drums on or discs for that matter. Add about 3/8"or so for the total width with the drums on.

JimKshortstep4x4 · 01-06-2005, 09:13 PM

71-72, (some 70's) 12 bolt rear ends measure 57" between backing plates.

69 and earlier, (some 70's) 12 bolt rear ends measure 56 1/2" beween backing plates.

If you compare axle measurements, the longer 71-72 style are 3/4" longer than the shorter ones.

Jim

01-06-2005, 12:23 AM	#1
Purs Got Big Block? Join Date: Apr 2000 Location: West Texas Posts: 1,510	axle width Can someone please give me a total width for a '68 12 bolt and also a '71-'72 12 bolt. Aren't the later model rears slightly wider? Thank you. __________________ "Experience is what you get when you didn't get what you wanted."

01-06-2005, 10:49 AM	#2
Vince M Senior Member Join Date: Apr 2000 Location: Orlando, FL Posts: 1,076	71-72 = 63 5/8" hub to hub. __________________ ............................................................ 68 Chevy CST SWB w/LS1, carb & 700r4. Golden Anniversary clone with a few improvements.

01-06-2005, 06:14 PM	#3
Purs Got Big Block? Join Date: Apr 2000 Location: West Texas Posts: 1,510	by hub do you mean the outside (wheel mounting surface) of the brake drum? __________________ "Experience is what you get when you didn't get what you wanted."

01-06-2005, 08:30 PM	#4
flatblack67c-10 Registered User Join Date: Nov 2004 Location: Dover, AR Posts: 120	The later ones are 1 inch wider on each tube, don't know measurement right off hand. __________________ was 67 chevy swb fleet now muticolored 69 step, 350/350, 3.73 posi, converted to 5 lug, torq thrust II 17x8 front 17x9.5 rear, factory air cab, fuel cell. future plans: shaved wiper cowl, shave stake pockets, phantom grille, and silver paint... 68 camaro ss396 project 54 f*rd project truck

01-06-2005, 09:06 PM	#5
Vince M Senior Member Join Date: Apr 2000 Location: Orlando, FL Posts: 1,076	The dimensions I gave are from the axle face to axle face. I forgot that I'm running discs and I didn't have the drums on or discs for that matter. Add about 3/8"or so for the total width with the drums on. __________________ ............................................................ 68 Chevy CST SWB w/LS1, carb & 700r4. Golden Anniversary clone with a few improvements.

01-06-2005, 09:13 PM	#6
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	71-72, (some 70's) 12 bolt rear ends measure 57" between backing plates. 69 and earlier, (some 70's) 12 bolt rear ends measure 56 1/2" beween backing plates. If you compare axle measurements, the longer 71-72 style are 3/4" longer than the shorter ones. Jim



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