Disc Brake Specifications
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 1998 Pontiac Trans Sport, 1998 Oldsmobile Silhouette, 1998 Oldsmobile Bravada, 1998 GMC Yukon, and 1998 GMC Suburban. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For additional information on S & T Series rear disc brakes, see REAR DISC BRAKES - S & T SERIES
article.
DISC BRAKE SPECIFICATIONS
| Application | In. (mm) | ||||
|---|---|---|---|---|---|
| Lateral Runout (All Models) | .004 (.10) | ||||
| Parallelism (All Models) | .0005 (.013) | ||||
| Original Thickness | |||||
| Astro & Safari | |||||
| 2WD | 1.04 (26.4) | ||||
| AWD | 1.25 (31.75) | ||||
| Silhouette, Trans Sport & Venture | 1.26 (32) | ||||
| "S" & "T" Series | |||||
| Front - JM3 (Brake Booster: 260 MM, Tandem High Flow) | 1.03 (26.2) | ||||
| Front - JC-1 (Brake: Vac. Power, 4 Whl Disc, 5500 Lbs.) | 1.14 (29) | ||||
| Rear - JC1 (Brake: Vac. Power, 4 Whl Disc, 5500 Lbs.) | .787 (20) | ||||
| All Others | |||||
| 11.57" Rotor ("C" & "K" Series) | 1.25 (31.8) | ||||
| 11.86" Rotor (Express, G-Van & Savana) | 1.29 (32.8) | ||||
| 12.50" Rotor ("C" & "K" Series) | 1.26 (32.0) | ||||
| 12.50" Rotor (Express, G-Van, Savana & "P" Series) | 1.28 (32.5) | ||||
| 12.50" Rotor ("C" & "K" Series) | 1.50 (38.1) | ||||
| 12.50" Rotor (Express, G-Van, Savana & "P" Series) | 1.54 (39.1) | ||||
| 13.75" Rotor ("C", "K" & "P" Series) | 1.54 (39.1) | ||||
| 14.25" Rotor ("C" & "K" Series) | 1.54 (39.1) | ||||
| Minimum Refinish Thickness (1) | |||||
| Astro, Safari | |||||
| 2WD | .980 (24.89) | ||||
| AWD | 1.230 (31.25) | ||||
| Silhouette, Trans Sport & Venture | 1.224 (31.08) | ||||
| "S" & "T" Series | |||||
| Front - JM3 (Brake Booster: 260 MM, Tandem High Flow) | .980 (24.89) | ||||
| Front - JC-1 (Brake: Vac. Power, 4 Whl Disc, 5500 Lbs.) | 1.10 (28) | ||||
| Rear - JC-1 (Brake: Vac. Power, 4 Whl Disc, 5500 Lbs.) | .748 (19) | ||||
| All Others | |||||
| 11.57 X 1.25" Rotor ("C" & "K" Series) | 1.230 (31.24) | ||||
| 11.86 X 1.29" Rotor (Express, G-Van & Savana) | 1.230 (31.24) | ||||
| 12.50 X 1.26" Rotor ("C" & "K" Series) | 1.230 (31.24) | ||||
| 12.50 X 1.28" Rotor (Express, G-Van, Savana & "P" Series) | 1.230 (31.24) | ||||
| 12.50 X 1.50" Rotor ("C" & "K" Series) | 1.480 (37.59) | ||||
| 12.50 X 1.54" Rotor (Express, G-Van, Savana & "P" Series) | 1.480 (37.59) | ||||
| 13.75 X 1.54" Rotor ("C", "K" & "P" Series) | 1.480 (37.59) | ||||
| 14.25 X 1.54" Rotor ("C" & "K" Series) | 1.480 (37.59) | ||||
| Discard Thickness | |||||
| Astro, Safari | |||||
| 2WD | .965 (24.51) | ||||
| AWD | 1.215 (30.86) | ||||
| Silhouette, Trans Sport & Venture | 1.209 (30.7) | ||||
| "S" & "T" Series | |||||
| Front - JM3 ( (Brake Booster: 260 MM, Tandem High Flow) | .965 (24.51) | ||||
| Front - JC1 (Brake: Vac. Power, 4 Whl Disc, 5500 Lbs.) | 1.08 (27.5) | ||||
| Rear - JC1 (Brake: Vac. Power, 4 Whl Disc, 5500 Lbs.) | .728 (18.5) | ||||
| All Others | |||||
| 11.57 X 1.25" Rotor ("C" & "K" Series) | 1.215 (30.86) | ||||
| 11.86 X 1.29" Rotor (Express, G-Van & Savana) | 1.215 (30.86) | ||||
| 12.50 X 1.26" Rotor ("C" & "K" Series) | 1.215 (30.86) | ||||
| 12.50 X 1.28" Rotor (Express, G-Van, Savana & "P" Series) | 1.215 (30.86) | ||||
| 12.50 X 1.50" Rotor ("C" & "K" Series) | 1.465 (37.21) | ||||
| 12.50 X 1.54" Rotor (Express, G-Van, Savana & "P" Series) | 1.465 (37.21) | ||||
| 13.75 X 1.54" Rotor ("C", "K" & "P" Series) | 1.465 (37.21) | ||||
| 14.25 X 1.54" Rotor ("C" & "K" Series) | 1.465 (37.21) | ||||
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