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Old 04-03-2021, 12:02 PM   #1
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,911
Is there a rear disc center hole dimension relationship to brake options?

I have a 2005 Silverado K2500HD with rear disc brakes.
The parts folks list two possible centre hole dimensions. 4.63" and 4.82"

My truck has the 4.82" centre hole rotors. I ripped one off and measured it before I bought the rotors.
It has the full floating 10.5" AAM rear axle.
It also has JH6 9900lb brakes.

What I'm wondering is if we can find a correlation between the axle type and brake RPO and the rotor hat centre hole dimensions.

If you know what you have I'd appreciate if you could post here.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8


RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.

Last edited by hatzie; 04-03-2021 at 02:10 PM.
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