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Username Post: Ford 9" and disc brake issues.
1956chevy
"3rd Year" Platinum Supporting Member
Posts 316
1956chevy
01-24-21 06:07 PM - Post#2812850    

I have a Moser Ford 9" rear end in my '56. I bought it and the disc brake setup from Classic Chevy International in 1999. I have always had problems with the emergency brake cables being pulled too tight. I remember exchanging the e-brake cable with CCI and still had same problem.

I understand they weld the spring perches on so you have the correct pinion angle. That caused my disc brake brackets to mount the caliper at the 9 o'clock position. Every other install I have seen has the caliper at the 10-11 o'clock position, therefore providing some slack in the emergency brake cable. You can see how the e-brake cable is tightly stretched. The spring perches are square and sitting flat on the leaf springs.

I always thought I had made a mistake when installing the caliper brackets. Today when I removed them I found that the rear end housing has quite an angle to it. The housing end is not even close to being parallel to the ground. If it was, the caliper would be in the correct position.

So... does anyone have a Ford 9" with disc brakes? What is the position of your calipers? Do you have slack in your e-brake cables?

Looking for an answer. Thanks.

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Keith Marang
Webmaster
Central Oklahoma Classic Chevy Club
www.55-57chevys.com

old66ss
Member
Posts 36
old66ss
02-22-21 08:58 AM - Post#2814867    

I rarely come here but I thought I would reply... surely you have your problem fixed by now. Your spring perches are not welded on correctly. Put the axle on jack stands. the snout should point down a couple degrees at least. That would bring your brake calipers around more toward the front some.
Actually front and rear u joint angles should "compliment" each other to be correct. U joints need to rock and some to live.
57 Chevy (owned since 1973-BB TH400) 66 Chevelle SS (blown & injected 427) 70 Buick GSX Stg. 1(bought her new) 67 El Camino Custom (402 BB) 67 Chevy II ( in progress)

acardon
Ultra Senior Member
Posts 11462
02-22-21 10:57 AM - Post#2814875    

You won't get an accurate pinion angle measurement with the suspension hanging down. You need the full weight on the suspension. The pinion should point up 4 degrees if the engine/transmission is at stock configeration. The level shows the angle in the correct direction but the axle housing needs to be supported by jack stands to measure the 4 degrees.
I don't know if CCI sells the CPP rear brakes, but if those are Cadillac calipers, the E-brake is not adjusted correctly. CPP has a newer write-up, from their original, on how to adjust the Cadillac calipers and it's pretty critical and confusing.
Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)

sz0k30
"12th Year" Gold Supporting Member
Posts 523
sz0k30
02-22-21 12:11 PM - Post#2814885    

Old66ss:
“The snout should point down a couple degrees at least.”

Acardon:
“The pinion should point up 4 degrees if the engine/transmission is at stock configuration.”

Seems at least one of you guys doesn't know what he's talking about.

acardon
Ultra Senior Member
Posts 11462
02-22-21 01:45 PM - Post#2814891    

The pinion and engine/transmission angles should be parallel. On a original tri-5 the engine/transmission slopes down 4 degrees, which means the pinion should point up 4 degrees.
Other vehicles may be different, but this is for a 56 chevy.
Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)

Rick_L
Member #409
Posts 27816
Rick_L
02-22-21 06:53 PM - Post#2814911    

acardon is right.
1956chevy
"3rd Year" Platinum Supporting Member
Posts 316
1956chevy
02-23-21 09:39 AM - Post#2814940    

Gentlemen, thank you for your replies. I have not fixed the issue yet, but have ordered parts. They just shipped from CPP yesterday.

The pinion / driveshaft /engine geometry looks correct when it is setting on the ground. I have never measured it. I just assumed that Moser built the housing correctly. ????

Yes Acardon, the rear calipers are the Cadillac version. I have read the detailed CPP instructions for adjusting the e-brake. Since I needed to replace the pads, I just went ahead and ordered a whole new CPP rear disc kit with new brackets and upgraded rotors. I also will be changing the e-brake cable from the stock one to a universal one that CPP sells. Then I will not have to worry about it being too taught (At least that is what the CPP tech guy said. ????)

I will post photos once it is done.
Keith Marang
Webmaster
Central Oklahoma Classic Chevy Club
www.55-57chevys.com

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