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1994-2001 Ram Brake Specs
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Ram 1500
1994-1999
2000-2001
2WD
4WD
Power Assist Type
vacuum dual diaphragm 
Total Brake Swept Area
538.8 sq. in.
3476 sq cm
  
 

Front Disc Brakes    (Available w/ optional ABS)

Front Vented Disc
Dia x Thickness (a)
11.6 x 1.25"
294 x 32mm 
11.96x1.18"
304x30mm
12.10x1.18"
307.5x30mm
Minimum Rotor Thickness
marked on rotor
1.215"
30.86mm
1.2689"
32.23mm
Max Runout
0.005"   0.127mm
0.005"   0.127mm
Max Thickness variation
0.001", 0.025mm
 
Brake Caliper Piston
2.95", 75mm
Single piston
2.126" 54mm
Dual piston
Minimum pad lining thickness
5/16"
 

Rear Drum Brakes   (standard w/ ABS)

Drum Size 11 x 2.0",  280 x 51mm 
11x2.5", 279x57mm
Wheel Cylinder Bore
0.937", 23.8mm
1.00", 25.4mm
Max Runout
0.008", 0.20mm
0.007", 0.18mm
Max Thickness variation
0.003", 0.076mm
0.003", 0.076mm
Minimum lining thickness
1/16"
 
The brake shoes are not fixed on the support plate, which allows the shoes to pivot and move vertically as needed.

 

1994-1999 HD
2500 2WD
2500 4X4
3500
Power Assist Type 1994-1995 all: Dual Vacuum Diaphragm
1996-1999 Gas Engine: Dual Vacuum Diaphragm
1996-2001 Diesel Engine: Hydraulic Booster
Total Brake Swept Area
676.4 sq. in.
4364 sq. cm.
761.8 sq. in.
4915 sq. cm.
Front Disc Brakes
       (All 1994-1999 2500 and 1994-1997 3500  Available w/ optional ABS)
       (1998-1999 3500: standard w/ ABS)
Vented Disc Size
Dia x Thickness
12.5 x 1.5",  318 x 38mm
Minimum Rotor Thickness 1.334" or as marked on Rotor
Brake Caliper Piston
3.14", 80mm
3.38" (86mm) 
Minimum lining thickness
5/16"
Rear Drum Brakes    (All standard w/ ABS)
Size
13.0 x 2.5, 330 x 63.5mm
13.0 x 3.5", 330 x 89mm
Wheel Cylinder Bore
94-96 0.937", 23.8mm
97-99 1.06", 27mm
1.06" (27mm)
Minimum lining thickness
1/16"
The brake shoes are not fixed on the support plate, which allows the shoes to pivot and move vertically as needed.
 
2000-2001:   All 2500, 3500 Disc/Drum Brakes - built before Jan 1, 2001
Power Assist Type Dual Vacuum Diaphragm w/gasoline engine
Hydraulic booster w/diesel engine
Total Brake Swept Area  
Front Disc Brakes (2500 Available w/ optional ABS, 3500 standard with ABS)
Front Vented Disc
Dia x Thickness
12.5 x 1.5",  326.5 x 36mm
Minimum Rotor Thickness
1.32", 33.53mm
Max Runout
0.005", 0.127mm
Max Thickness variation
0.001", 0.025mm
Brake Caliper Bores
2.205",  56mm
Minimum pad lining thickness
  
Brake Calipers use dual phenolic resin pistons
Rear Drum Brakes    (All w/ standard ABS)
Drum Size
12.125 x 3.5"  308 x 89mm
Wheel Cylinder Bore
1.00", 25.4mm
Max Runout
0.007", 0.18mm
Max Thickness variation
0.003", 0.076mm
Minimum lining thickness
1/16"

The brake shoes are not fixed on the support plate, which allows the shoes to pivot and move vertically as needed.

 

2001.5:   All 2500, 3500 Four wheel Disc Brake - built after Jan 1, 2001
Power Assist Type Dual Vacuum Diaphragm w/gasoline engine
Hydraulic booster w/diesel engine
Total Brake Swept Area  
Front Disc Brakes (2500 Available w/ optional ABS, 3500 standard with ABS)
Front Vented Disc
Dia x Thickness
12.5 x 1.5",  326.5 x 36mm
Minimum Rotor Thickness
1.32", 33.53mm
Max Runout
0.005", 0.127mm
Max Thickness variation
0.001", 0.025mm
Brake Caliper Bores
2 x 2.205",  56mm
Minimum pad lining thickness
 
Brake Calipers use dual phenolic resin pistons
Rear Disc Brakes    (All w/ standard ABS)
Disc Dia x Thickness
 
Brake Caliper Bore
 
Max Runout
 
Max Thickness variation
 
Minimum lining thickness
 

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Last Update August 8, 2001