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Home >> GMC >> 1990 >> Forward Control 6.2 J, Automatic, 475/M40 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> DISC & DRUM (C, G, K, P, R & V Series) >> Disc Brake Specifications

Disc Brake Specifications

DISC BRAKE ROTOR SPECIFICATIONS

Application In. (mm)
Disc Diameter
"C" & "K" Series 11.57 (293.9)
"C" & "K" Series 12.50 (317.5)
"G", "P", "R" & "V" Series 11.86 (301.2)
"G", "P", "R" & "V" Series 12.50 (317.5)
"G", "P", "R" & "V" Series 14.25 (361.9)
Lateral Runout: All Models .004 (.10)
Parallelism: All Models .0005 (.013)
Original Thickness
"C" & "K" Series 1.00 (25.4)
"C" & "K" Series (1) 1.25 (31.8)
"G", "P", "R" & "V" Series 1.28 (32.5)
"G", "P", "R" & "V" Series 1.54 (39.1)
Min. Refinish Thickness
"C" & "K" Series (2) .98 (24.9)
"C" & "K" Series (3) 1.23 (31.3)
"G", "P", "R" & "V" Series (4) .98 (24.9)
"G", "P", "R" & "V" Series (5) 1.23 (31.2)
"G", "P", "R" & "V" Series (6) 1.48 (37.6)
Discard Thickness
"C" & "K" Series (2) .965 (24.51)
"C" & "K" Series (3) 1.21 (30.9)
"G", "P", "R" & "V" Series (4) .965 (24.51)
"G", "P", "R" & "V" Series (5) 1.21 (30.9)
"G", "P", "R" & "V" Series (6) 1.46 (37.1)
(1) With dual diaphragm vacuum booster.
(2) On 1" original thickness disc.
(3) On 1.25" original thickness disc.
(4) On 11.86" diameter disc.
(5) On 12.50" diameter disc.
(6) On 14.25" diameter disc.