axle swap 5 bolt pattern into 67 12bolt - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rooster's 67 · 12-18-2003, 04:07 AM

anyone know if the axles from 71-72 5 bolt pattern will fit/work in the 67-70 12 bolt housings? is the axle splines and length the same?

Injected68LS1 · 12-18-2003, 04:22 AM

They aren't a direct fit. They are 3/4" wider each. I think the spline count is the same. I know some board members have done this but used some kind of spacer for the extra length. I would do that personally.

I have 5 lug conversion axles for my 68. I got it from ECE. They make axles that are the right width.

Rooster's 67 · 12-18-2003, 04:43 AM

what do the ECE axles set ya back,
and I've heard early model 71 used a different width axle housing that matches the width of the 67-70's
not confirmed

SCOTI · 12-18-2003, 09:14 AM

Rooster, I think that both ECE & Classic Perf Parts both sell 5 lug conversion axles so you might do some comparison shopping. I believe CCP's kit is axles & drums for 3 bills. I bought better axles from Moser & got drums for a 72 @ Autozone.

Tx Firefighter · 12-18-2003, 11:08 AM

Rooster, you're close.

It's the 70s that can go either way. There was a running change during production to wider axles.

The later axles will fit in the early housings, but like was said, they are too long by 3/4 inch. What some guys are doing is fabricating a 3/4 inch spacer that goes between the axle housing flange and the brake backing plate. Then bolt the backing plate on with long bolts. This effectively moves the brakes out 3/4 inch to line up with the longer axles.

Rooster's 67 · 12-18-2003, 02:47 PM

Nah I'll use the correct length stuff.
they were engineered for the load rating with the flange, and wheel contact in a specific place, ya know. and I have been known to haul stuff around.

12-18-2003, 04:07 AM	#1
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	axle swap 5 bolt pattern into 67 12bolt anyone know if the axles from 71-72 5 bolt pattern will fit/work in the 67-70 12 bolt housings? is the axle splines and length the same? __________________ The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

12-18-2003, 04:22 AM	#2
Injected68LS1 Registered User Join Date: Jul 2003 Location: So. Cal. Posts: 389	They aren't a direct fit. They are 3/4" wider each. I think the spline count is the same. I know some board members have done this but used some kind of spacer for the extra length. I would do that personally. I have 5 lug conversion axles for my 68. I got it from ECE. They make axles that are the right width. __________________ 1968 Chev SWB with 1998 Corvette LS1 305hp and 320 ftlb to the wheels (stock engine!) AEM EMS and wideband O2 sensors Bowtie Overdrive's 700R4, stage 3 Baer 4 wheel discs and 20s http://iciclelanding.com/aperture?album=2049&view=album

12-18-2003, 04:43 AM	#3
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	what do the ECE axles set ya back, and I've heard early model 71 used a different width axle housing that matches the width of the 67-70's not confirmed __________________ The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

12-18-2003, 09:14 AM	#4
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,132	Rooster, I think that both ECE & Classic Perf Parts both sell 5 lug conversion axles so you might do some comparison shopping. I believe CCP's kit is axles & drums for 3 bills. I bought better axles from Moser & got drums for a 72 @ Autozone. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

12-18-2003, 11:08 AM	#5
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Rooster, you're close. It's the 70s that can go either way. There was a running change during production to wider axles. The later axles will fit in the early housings, but like was said, they are too long by 3/4 inch. What some guys are doing is fabricating a 3/4 inch spacer that goes between the axle housing flange and the brake backing plate. Then bolt the backing plate on with long bolts. This effectively moves the brakes out 3/4 inch to line up with the longer axles. __________________ I'm on the Instagram- @Gearhead_Kevin

12-18-2003, 02:47 PM	#6
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	Nah I'll use the correct length stuff. they were engineered for the load rating with the flange, and wheel contact in a specific place, ya know. and I have been known to haul stuff around. __________________ The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

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