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Home >> Chevrolet >> 1990 >> Step Van 7.4 N, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Disc Brake System & Drum Brake System) >> Disc Brake Specifications

Disc Brake Specifications

WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 1992 Pontiac Trans Sport, 1992 Oldsmobile Silhouette, 1992 Oldsmobile Bravada, 1992 GMC Yukon, and 1992 GMC Vandura Special. However, it is still accessible from the selected car via links, so may be relevant.
DISC BRAKE SPECIFICATIONS

Application In. (mm)
Lateral Runout
All Models .004 (.10)
Parallelism
All Models .0005 (.013)
Original Thickness
Astro & Safari 1.04 (26.4)
Lumina APV, Silhouette & Trans Sport 1.043 (26.49)
"S" & "T" Series 1.03 (26.2)
All Others
11.57" Rotor
4600 Lbs. GVW 1.00 (25.4)
6400 & 7200 Lbs. GVW 1.25 (31.8)
11.86" Rotor 1.29 (32.8)
12.50" Rotor
"C" & "K" Series 1.26 (32.0)
Except "C" & "K" Series
8400 Lbs. GVW 1.28 (32.5)
10, 000 Lbs. GVW 1.54 (39.1)
13.75" Rotor 1.54 (39.1)
14.25" Rotor 1.54 (39.1)
Minimum Refinish Thickness (1)
Astro, Safari & "S" & "T" Series .980 (24.89)
Lumina APV, Silhouette & Trans Sport .972 (24.69)
All Others
11.57 X 1.00" Rotor .980 (24.89)
11.57 X 1.25" Rotor 1.230 (31.24)
11.86 X 1.29" Rotor 1.230 (31.24)
12.50 X 1.26" Rotor 1.230 (31.24)
12.50 X 1.28" Rotor 1.230 (31.24)
12.50 X 1.54" Rotor 1.480 (37.59)
13.75 X 1.54" Rotor 1.480 (37.59)
14.25 X 1.54" Rotor 1.480 (37.59)
Discard Thickness
Astro, Safari & "S" & "T" Series .965 (24.51)
Lumina APV, Silhouette & Trans Sport .957 (24.31)
All Others
11.57 X 1.00" Rotor .965 (24.51)
11.57 X 1.25" Rotor 1.215 (30.86)
11.86 X 1.29" Rotor 1.215 (30.86)
12.50 X 1.26" Rotor 1.215 (30.86)
12.50 X 1.28" Rotor 1.215 (30.86)
12.50 X 1.54" Rotor 1.465 (37.21)
13.75 X 1.54" Rotor 1.465 (37.21)
14.25 X 1.54" Rotor 1.465 (37.21)
(1) Use specification stamped on rotor (if available).