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04-20-2025, 02:13 PM
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#1 |
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Registered User
Join Date: Apr 2022
Location: NC
Posts: 43
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Wilwood rear disk help
Good afternoon all,
I have a built 12 bolt with a wilwood rear disk brake kit. When I went to install the calipers aren’t lining up with the rotors. They are offset too far inward toward the housing. This creates the issue where the only way I can shim it will make the problem worse. I’ll attach a pic for reference. Any tips are appreciated! |
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04-20-2025, 02:40 PM
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#2 |
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Senior Member
 
Join Date: Jun 2022
Location: San Ramon,CA
Posts: 1,071
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Re: Wilwood rear disk help
rotated
__________________
1970 C10 Custom longbed 350/350 “Carburetors are forgiving, timing is not” — Thunderhead289 |
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04-20-2025, 04:08 PM
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#3 |
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Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,592
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Re: Wilwood rear disk help
Stock axles? Disc fully seated on the axle?
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04-20-2025, 04:26 PM
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#4 |
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Registered User
Join Date: Apr 2022
Location: NC
Posts: 43
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Re: Wilwood rear disk help
Aftermarket axles, not sure of the specifics because I bought the axle already built. I pulled them to install the parking brake/disk brake bracket and they’re nice and beefy but no brand or anything on them. The calipers are fully seated on the axle flange face.
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04-20-2025, 04:46 PM
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#5 |
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Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 3,850
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Re: Wilwood rear disk help
.
I did a quick Online search. Found a discussion regarding wilwood kit for rear brakes on some other platform but, in it they discussed the kit was engineered to work with 2 different "offsets" or axles. Simply swapping the mounting brackets from side to side (and flipping them over as a result) was the method of switching between the 2 specs. Another discussion had the installer grinding down the mounting bosses to move the caliper where needed and yet another discussion had the installer shimming the rotor out slightly with a spacer. In one instance, the installer found the caliper itself was out of spec and had wilwood send him a new one. He found this by comparing the two calipers with detailed and precise measurements. Not sure any of that applies in your case. Hth, -Kevin
__________________
67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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04-20-2025, 08:10 PM
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#6 |
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Registered User
Join Date: Apr 2022
Location: NC
Posts: 43
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Re: Wilwood rear disk help
Sweet thanks for that. I’ll try flipping sides to see if that’ll work, I don’t know if it will with how the parking brake cable is routed, past that I’ll either have to grind or run it.
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04-21-2025, 01:01 AM
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#7 |
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Registered User
Join Date: Mar 2018
Location: Colchester IL
Posts: 512
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Re: Wilwood rear disk help
I had the same issue with my CPP set up. I had a machinist buddy takeoff I believe .030 off of the mounting brackets. I am wondering if the mounting jigs at GM wasn't getting a little worn when they welded the ends on the axle tube. Both sides were the same on mine.
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04-21-2025, 07:32 AM
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#8 |
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Registered User
Join Date: Apr 2022
Location: NC
Posts: 43
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Re: Wilwood rear disk help
Gotcha, both sides are the same on mine as well.
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