Are 12 bolt car and 12 bolt truck backing plates the same? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ford Assassin · 08-06-2008, 12:48 PM

I ask because I want to piece together a rear disc brake setup for my '69 C10. There are brackets out there that state they will bolt onto a 10 or 12 rear end, but I wonder if they mean trucks too.

These are an example:

http://cgi.ebay.com/ebaymotors/Rear-....c0.m245.l1318

I think I am going to swap to 5 lug axles and wanted to do a rear disc brake swap in the process. Thanks guys!!

Longhorn Man · 08-06-2008, 03:46 PM

movin off the burb page, to the truck board

Ford Assassin · 08-06-2008, 04:27 PM

Oops, my mistake. I thought I posted in it in the truck forum.

crazy longhorn · 08-06-2008, 05:47 PM

No sir, those brackets are not the same as truck. IIRC, the Impala has the same housing ends as the truck rear, but the mid sized cars have a different end & bearing(bolt pattern is different for the backing plate). crazyL

Mike C · 08-06-2008, 10:21 PM

Correct. Big Car and Truck had same flange pattern for the backing plate. Big Car and Truck use larger wheel bearings than the small car (Camaro/Chevelle) The JL-8 Camaro uses the small bearings but has the large pattern which allows the use of the Corvette caliper mounts, but this is a more complicated disc swap than most. Best bet is to buy an aftermarket kit that comes with the correctly sized aftermarket parts.

Ford Assassin · 08-06-2008, 10:22 PM

Thanks guys!!

Ford Assassin · 08-20-2008, 01:28 PM

Anyone have a source for just the caliper brackets?

Thanks!!

08-06-2008, 12:48 PM	#1
Ford Assassin Registered User Join Date: Jun 2008 Location: Jackson, Ca. Posts: 674	Are 12 bolt car and 12 bolt truck backing plates the same? I ask because I want to piece together a rear disc brake setup for my '69 C10. There are brackets out there that state they will bolt onto a 10 or 12 rear end, but I wonder if they mean trucks too. These are an example: http://cgi.ebay.com/ebaymotors/Rear-....c0.m245.l1318 I think I am going to swap to 5 lug axles and wanted to do a rear disc brake swap in the process. Thanks guys!! __________________ Cable -K5 Blazer 2wd: 6.0 LQ4, 7875 Turbo, Tick Stage II Turbo Cam, Built 4L80e, RevMax Billet 3600, 9.5" 14 Bolt -Chevy 3+3 Crew Cab Dually: Cummins 12v P-Pump Swap, Compound Turbos, A2W Intercooler, NV4500HD, 4wd conversion, Radius Arms, Coilovers, Crossover Steering, etc Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=803608

08-06-2008, 03:46 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Are 12 bolt car and 12 bolt truck backing plates the same? movin off the burb page, to the truck board

08-06-2008, 04:27 PM	#3
Ford Assassin Registered User Join Date: Jun 2008 Location: Jackson, Ca. Posts: 674	Re: Are 12 bolt car and 12 bolt truck backing plates the same? Oops, my mistake. I thought I posted in it in the truck forum. __________________ Cable -K5 Blazer 2wd: 6.0 LQ4, 7875 Turbo, Tick Stage II Turbo Cam, Built 4L80e, RevMax Billet 3600, 9.5" 14 Bolt -Chevy 3+3 Crew Cab Dually: Cummins 12v P-Pump Swap, Compound Turbos, A2W Intercooler, NV4500HD, 4wd conversion, Radius Arms, Coilovers, Crossover Steering, etc Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=803608

08-06-2008, 05:47 PM	#4
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	Re: Are 12 bolt car and 12 bolt truck backing plates the same? No sir, those brackets are not the same as truck. IIRC, the Impala has the same housing ends as the truck rear, but the mid sized cars have a different end & bearing(bolt pattern is different for the backing plate). crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

08-06-2008, 10:21 PM	#5
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,712	Re: Are 12 bolt car and 12 bolt truck backing plates the same? Correct. Big Car and Truck had same flange pattern for the backing plate. Big Car and Truck use larger wheel bearings than the small car (Camaro/Chevelle) The JL-8 Camaro uses the small bearings but has the large pattern which allows the use of the Corvette caliper mounts, but this is a more complicated disc swap than most. Best bet is to buy an aftermarket kit that comes with the correctly sized aftermarket parts. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

08-06-2008, 10:22 PM	#6
Ford Assassin Registered User Join Date: Jun 2008 Location: Jackson, Ca. Posts: 674	Re: Are 12 bolt car and 12 bolt truck backing plates the same? Thanks guys!! __________________ Cable -K5 Blazer 2wd: 6.0 LQ4, 7875 Turbo, Tick Stage II Turbo Cam, Built 4L80e, RevMax Billet 3600, 9.5" 14 Bolt -Chevy 3+3 Crew Cab Dually: Cummins 12v P-Pump Swap, Compound Turbos, A2W Intercooler, NV4500HD, 4wd conversion, Radius Arms, Coilovers, Crossover Steering, etc Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=803608

08-20-2008, 01:28 PM	#7
Ford Assassin Registered User Join Date: Jun 2008 Location: Jackson, Ca. Posts: 674	Re: Are 12 bolt car and 12 bolt truck backing plates the same? Anyone have a source for just the caliper brackets? Thanks!! __________________ Cable -K5 Blazer 2wd: 6.0 LQ4, 7875 Turbo, Tick Stage II Turbo Cam, Built 4L80e, RevMax Billet 3600, 9.5" 14 Bolt -Chevy 3+3 Crew Cab Dually: Cummins 12v P-Pump Swap, Compound Turbos, A2W Intercooler, NV4500HD, 4wd conversion, Radius Arms, Coilovers, Crossover Steering, etc Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=803608



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.