are 10 bolt and 12 bolt drums the same? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

low 84 · 08-03-2004, 10:35 PM

anybody know if the drums on 10 and 12 bolt rearends are interchangable?

thanks

ocbaud · 08-03-2004, 11:05 PM

as far as i know, yes they are..... axle wise. now the fittings MAY be different.

but what do i know haha

**swervin ervin** · 08-03-2004, 11:07 PM

Axle size has nothing to do with the drum size. It's according to what code you have, such as JB1, JB3, JB5, JB6, etc. There are two sizes on C10's. 11 x 2 and 11.15 x 2.75.

Destructo · 08-03-2004, 11:15 PM

I swapped them on my K10, no problems. I also swapped all the other hardware too, make sure your brake shoes and drums match.

low 84 · 08-03-2004, 11:57 PM

Quote:

Originally Posted by swervin ervin

Axle size has nothing to do with the drum size. It's according to what code you have, such as JB1, JB3, JB5, JB6, etc. There are two sizes on C10's. 11 x 2 and 11.15 x 2.75.

so mike, if i measure the shoes on both rears and they are both the same width , then the drums should swap, right?

**swervin ervin** · 08-04-2004, 12:22 AM

Right.

low 84 · 08-04-2004, 12:29 AM

cool, thanks!

BaggedC10 · 08-04-2004, 01:26 AM

Yep. I swapped drum brakes from my 10 to 12-bolt rear end.

ElGracho · 08-04-2004, 02:13 AM

I'll third that info, I'm in the middle of switching brakes from my 86 C10 to my 76 C10 frame, 10 bolt to 12 bolt. Everything bolts right up.

low 84 · 08-04-2004, 10:06 AM

awsome, looks like all i have to buy is some fluid and a u joint

08-03-2004, 10:35 PM	#1
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	are 10 bolt and 12 bolt drums the same? anybody know if the drums on 10 and 12 bolt rearends are interchangable? thanks __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

08-03-2004, 11:07 PM	#3
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Axle size has nothing to do with the drum size. It's according to what code you have, such as JB1, JB3, JB5, JB6, etc. There are two sizes on C10's. 11 x 2 and 11.15 x 2.75. __________________ Mike 1985 Chevy C-10

08-03-2004, 11:15 PM	#4
Destructo Registered User Join Date: Sep 2003 Location: Lewisville, NC Posts: 1,836	I swapped them on my K10, no problems. I also swapped all the other hardware too, make sure your brake shoes and drums match. __________________ 1985 Scottsdale Shortbed 4x4 Stout 350 with some "upgrades"-700r4-33x12.5" Mud Tires, Warn 8274-50 winch. 2005 Chevrolet Colorado Regular Cab 2wd 4-banger, 5 speed, Street Pack with 3.73 axle.

08-04-2004, 12:29 AM	#7
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	cool, thanks! __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

08-04-2004, 01:26 AM	#8
BaggedC10 Under construction! Join Date: Aug 2002 Location: NorCal Posts: 1,065	Yep. I swapped drum brakes from my 10 to 12-bolt rear end. __________________ 2001 Silverado bagged on 22's. Sold

08-03-2004, 11:05 PM	#2
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	as far as i know, yes they are..... axle wise. now the fittings MAY be different. but what do i know haha

08-04-2004, 12:22 AM	#6
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Right.

08-04-2004, 02:13 AM	#9
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,553	I'll third that info, I'm in the middle of switching brakes from my 86 C10 to my 76 C10 frame, 10 bolt to 12 bolt. Everything bolts right up. __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

08-04-2004, 10:06 AM	#10
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	awsome, looks like all i have to buy is some fluid and a u joint __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's



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