CPP rear disc brake kit????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mkhutch · 04-21-2007, 09:07 PM

Hey guys, working on my build project and I had purchased the CPP rear disc brake kit. The brackets line up just fine but my problem seems to be with the calipers and/or bracket. When you slide the calipers into there mounting location, the rotor will need to be pulled out away from the axle about 3/4" to get the setup to work correctly. The way I see this problem to be corrected would be to unbolt the caliper bracket and put a 3/4" spacer between the axle flange and the bracket.

Has anyone ran into this problem before or am I really tired and losing my mind????

Please if anyone has the any suggestions or has run into this problem, please let me know.

Thanks guys!!!

70c10 · 04-21-2007, 09:27 PM

I have no clue about the kit but I have heard the axles in late 1970 were a little wider OR shorter. I can't remember which, but maybe somebody swapped your axle out to the one that don't work with their kit. This is just a W.A.G.

71meangreenc10 · 04-21-2007, 09:27 PM

I used there kit and mine had no problem mounting,,,Are your axle flanges warped? Mine came with spacers and it lined up. I have had issues with getting everything else to work, did you get the master cylinder and prop valve from them too?

Smitty

mkhutch · 04-21-2007, 09:57 PM

Yeah it came with the front disc's, MC and all. No problem on the fronts. I didn't have any spacers with the kit besides the caliper bracket that had 3 roughly 1/4" spacers welded to the bracket itself. I guess what is throwing me off is possibly the axles. The axles came from CPP as well when I ordered the kit. They are 30 3/4" axles but it seems like the kit maybe was made for 31.5" axles. That would give me the 3/4" I would need or I could possibly make these axles work and make the 3/4" back by spacing the bracket in. Let me know what you think of that and if that may work mechanically without safety issues..

Thanks again for the replies!

mkhutch · 04-22-2007, 10:03 AM

Anyone else?
Thanks!

Fastfun · 04-22-2007, 10:42 AM

I installed a set on my 72 and the install was easy. The only problem that I have had is adjusting them.

rodstored-72 · 04-22-2007, 11:31 AM

i have the same kit on my '72 & along with fastfun i didn't have too much trouble though some how i actually put the calipers on the wrong side, evrything worked but they faced toward the front instead of facing the back. i talked & looked at fastfun's setup, went home & switched sides with the calipers & they seem to work fine too. i think the directions could be better at discriptions of the pics & the steps. i hope this helps....

good luck & maybe give them a call (techline) & see what they say....

rodstored-72

04-21-2007, 09:07 PM	#1
mkhutch Throbbing Member Join Date: Jul 2006 Location: McDonough, GA Posts: 350	CPP rear disc brake kit????? Hey guys, working on my build project and I had purchased the CPP rear disc brake kit. The brackets line up just fine but my problem seems to be with the calipers and/or bracket. When you slide the calipers into there mounting location, the rotor will need to be pulled out away from the axle about 3/4" to get the setup to work correctly. The way I see this problem to be corrected would be to unbolt the caliper bracket and put a 3/4" spacer between the axle flange and the bracket. Has anyone ran into this problem before or am I really tired and losing my mind???? Please if anyone has the any suggestions or has run into this problem, please let me know. Thanks guys!!!

04-21-2007, 09:27 PM	#2
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Re: CPP rear disc brake kit????? I have no clue about the kit but I have heard the axles in late 1970 were a little wider OR shorter. I can't remember which, but maybe somebody swapped your axle out to the one that don't work with their kit. This is just a W.A.G. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

04-21-2007, 09:27 PM	#3
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,179	Re: CPP rear disc brake kit????? I used there kit and mine had no problem mounting,,,Are your axle flanges warped? Mine came with spacers and it lined up. I have had issues with getting everything else to work, did you get the master cylinder and prop valve from them too? Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 69 C30 Former Motor Home, Flat Bed time 70 G20 Red-E-Kamp Conversion "I'm your Boogy Van"

04-21-2007, 09:57 PM	#4
mkhutch Throbbing Member Join Date: Jul 2006 Location: McDonough, GA Posts: 350	Re: CPP rear disc brake kit????? Yeah it came with the front disc's, MC and all. No problem on the fronts. I didn't have any spacers with the kit besides the caliper bracket that had 3 roughly 1/4" spacers welded to the bracket itself. I guess what is throwing me off is possibly the axles. The axles came from CPP as well when I ordered the kit. They are 30 3/4" axles but it seems like the kit maybe was made for 31.5" axles. That would give me the 3/4" I would need or I could possibly make these axles work and make the 3/4" back by spacing the bracket in. Let me know what you think of that and if that may work mechanically without safety issues.. Thanks again for the replies! Last edited by mkhutch; 04-21-2007 at 09:58 PM.

04-22-2007, 10:03 AM	#5
mkhutch Throbbing Member Join Date: Jul 2006 Location: McDonough, GA Posts: 350	Re: CPP rear disc brake kit????? Anyone else? Thanks!

04-22-2007, 10:42 AM	#6
Fastfun Registered User Join Date: Jun 2005 Location: Scottsdale, AZ Posts: 615	Re: CPP rear disc brake kit????? I installed a set on my 72 and the install was easy. The only problem that I have had is adjusting them.

04-22-2007, 11:31 AM	#7
rodstored-72 chevy truck fan Join Date: Mar 2005 Location: Gilbert, arizona 85298 Posts: 2,008	Re: CPP rear disc brake kit????? i have the same kit on my '72 & along with fastfun i didn't have too much trouble though some how i actually put the calipers on the wrong side, evrything worked but they faced toward the front instead of facing the back. i talked & looked at fastfun's setup, went home & switched sides with the calipers & they seem to work fine too. i think the directions could be better at discriptions of the pics & the steps. i hope this helps.... good luck & maybe give them a call (techline) & see what they say.... rodstored-72

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