(931) 646-4836
Request A Quote
Facebook
YouTube
0
Skip to content
Vehicles
Aston Martin
Austin-Healey
Bentley
Jaguar
Jensen
Lotus
Mercedes
MG
Mini
Morgan
Triumph
Products
Electric Power Steering
Starters and Alternators
Clutches
Exhaust
Transmissions
Transmission Kits
Flywheel
Tech
Speed Analyzer
Warranty
News
About
Contact
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
185
195
205
215
225
235
245
255
265
275
285
295
305
315
325
335
345
355
365
375
385
/
30
35
40
45
50
55
60
65
70
75
80
14
15
16
17
18
19
20
Step 3:
Enter Your Differential Ratio
Example: 3.08
Calculate
Results
Common Cruising Speeds
55
mph
65
mph
75
mph
85
mph
Non-OD Trans RPM
2000
rpm
3800
rpm
4200
rpm
4500
rpm
Tremec Trans OD RPM
Tremec Trans 6-speed OD RPM
Join Our Mailing List
Sign Up