Start Here

Step 1: Pick Your American Powertain Transmission

5-speeds

T-5
TKO500
TKO600SS
TKO600RR

6-speeds

Magnum Close Ratio
Magnum Wide Ratio

Automatics

Super Shift 4-speed
Super Shift 6-speed

Step 2: Enter Your Tire Size

 / 

Step 3: Enter Your Differential Ratio

Example: 3.08

Results

Common Cruising Speeds

55mph

65mph

75mph

85mph

Non-OD Trans RPM

2000rpm

3800rpm

4200rpm

4500rpm

Tremec Trans OD RPM