- Np435 Overdrive Kit
- Np435 Shifter
- Np435 Rebuild
- Np435 Rebuild Kit
- Np435 Vs T18
Gear ratio affects a variety of driveline combinations, so it’s important to know what the gear ratios are for a gearbox you might be swapping into your ride. (Image/YourMechanic)
Np435 Overdrive Kit
Dodge Ram Cummins Diesels and Mopar Since 2002 A forum community dedicated to Dodge Ram Cummins diesels and Mopar owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! The Buick V6 started its production life in the 1962 Buick Special. It was a 90 degree engine and its first displacement was 198 CID. It was dubbed the 'Fireball'.
Because different transmission gear ratios can greatly affect a drivetrain combination, it’s important for anyone performing a transmission swap to know the gear ratios of the gearboxes you might be installing in your vehicle.
We’ve assembled a variety of manual gear ratio charts for General Motors vehicles that we hope can help you avoid choosing the wrong transmission only to discover your hot rod or truck is performing like a 19th-century horse-drawn chuckwagon, minus the delicous beans and salt pork.
Planning a manual transmission swap in your Chevy or GM vehicle? Double-check your gear ratios. Here’s a good start.
[NOTE: Not every transmission in GM’s history is listed here. It is mostly Camaro/Firebird/Corvette-focused. We’re sorry if you love a particular transmission not shown on this list. We promise it wasn’t intended as any sort of slight to the excluded GM-made transmissions.]
T-10 Four-Speed
| Type | First Gear | Second Gear | Third Gear | Fourth Gear |
|---|
| A-code | 2.54 | 1.92 | 1.51 | 1.00 |
| C-, F-code | 2.20 | 1.64 | 1.31 | 1.00 |
| D-, E-, G-code | 2.54 | 1.89 | 1.51 | 1.00 |
Super T-10 Four-Speed
| Type | First Gear | Second Gear | Third Gear | Fourth Gear |
|---|
P-code
(wide ratio) | 2.43 | 1.76 | 1.47 | 1.00 |
S-code
(close ratio) | 2.43 | 1.61 | 1.23 | 1.00 |
| U-code | 3.44 | 2.28 | 1.46 | 1.00 |
| V-code | 2.23 | 1.77 | 1.35 | 1.00 |
| W-code | 2.64 | 1.75 | 1.34 | 1.00 |
| X-code | 2.64 | 1.61 | 1.23 | 1.00 |
| Y-code | 2.88 | 1.74 | 1.33 | 1.00 |
| Z-code | 3.42 | 2.28 | 1.46 | 1.00 |
| AA-code | 3.29 | 1.72 | 1.00 | 1.00 |
| BB-code | 4.17 | 2.28 | 1.46 | 1.00 |
| CC-code | 2.88 | 1.91 | 1.33 | 1.00 |
Muncie M21/M22 Four-Speed
Np435 Shifter
| Type | First Gear | Second Gear | Third Gear | Fourth Gear |
|---|
| 1963-77 | 2.20 | 1.64 | 1.27 | 1.00 |
Saginaw Three-Speed
| Type | First Gear | Second Gear | Third Gear |
|---|
| All | 2.54 | 1.88 | 1.00 |
Saginaw Four-Speed
| Type | First Gear | Second Gear | Third Gear | Fourth Gear |
|---|
| All | 2.20 | 1.64 | 1.47 | 1.00 |
T-5 Five-Speed (Camaro/Firebird)
| Type | First Gear | Second Gear | Third Gear | Fourth Gear | Fifth Gear |
|---|
| 1983-87 (V8) | 2.95 | 1.94 | 1.34 | 1.00 | 0.74 |
| 1988-92 (V8) | 2.95 | 1.94 | 1.34 | 1.00 | 0.73 |
| 1988-92 | 3.35 | 1.99 | 1.33 | 1.00 | 0.68 |
| 1988-92 | 3.97 | 2.34 | 1.46 | 1.00 | 0.79 |
T-56 Six-Speed (Camaro/Firebird)
| Type | First Gear | Second Gear | Third Gear | Fourth Gear | Fifth Gear | Sixth Gear |
|---|
| 1993 (wide ratio) | 3.36 | 2.07 | 1.35 | 1.00 | 0.84 | 0.62 |
| 1993 (close ratio) | 2.97 | 1.94 | 1.34 | 1.00 | 0.84 | 0.62 |
| 1994-2002 | 2.66 | 1.78 | 1.30 | 1.00 | 0.74 | 0.50 |
T-56 Six-Speed (Corvette)
| Type | First Gear | Second Gear | Third Gear | Fourth Gear | Fifth Gear | Sixth Gear |
|---|
| 1997-2007 Corvette (base) | 2.66 | 1.78 | 1.30 | 1.00 | 0.74 | 0.50 |
| 2001-07 Corvette Z06 | 2.97 | 2.07 | 1.43 | 1.00 | 0.84 | 0.56 |
ZF Six-Speed
| Type | First Gear | Second Gear | Third Gear | Fourth Gear | Fifth Gear | Sixth Gear |
|---|
| 1989-96 Corvette (LT1/4/5) | 2.68 | 1.80 | 1.31 | 1.00 | 0.75 | 0.50 |
T-6060 Six-Speed
| Type | First Gear | Second Gear | Third Gear | Fourth Gear | Fifth Gear | Sixth Gear |
|---|
| 2008-13 Corvette | 2.66 | 1.78 | 1.30 | 1.00 | 0.74 | 0.50 |
| 2008-09 Corvette Z51 | 2.97 | 2.07 | 1.43 | 1.00 | 0.71 | 0.57 |
| 2009 Pontiac G8 GXP | 2.97 | 2.10 | 1.46 | 1.00 | 0.71 | 0.56 |
2009-13 Cadillac
CTS-V | 2.66 | 1.78 | 1.30 | 1.00 | 0.80 | 0.63 |
| 2010 Camaro SS | 3.01 | 2.07 | 1.43 | 1.00 | 0.84 | 0.57 |
| 2012-15 Camaro ZL1 | 2.66 | 1.78 | 1.30 | 1.00 | 0.80 | 0.63 |
| 2015-17 Chevrolet SS | 3.01 | 2.07 | 1.43 | 1.00 | 0.71 | 0.57 |
2016-17 Cadillac
ATS-V | 2.66 | 1.78 | 1.30 | 1.00 | 0.79 | 0.63 |
M420 Four-Speed (Truck)
| Type | First Gear | Second Gear | Third Gear | Fourth Gear |
|---|
| 1957-67 | 7.20 | 3.57 | 1.70 | 1.00 |
M465 Four-Speed (Truck)
| Type | First Gear | Second Gear | Third Gear | Fourth Gear |
|---|
| 1968-90 | 6.54 | 3.57 | 1.57 | 1.00 |
Np435 Rebuild
NP435 Four-Speed (Truck)
| Type | First Gear | Second Gear | Third Gear | Fourth Gear |
|---|
| All | 4.78 | 2.39 | 1.37 | 1.00 |
Np435 Rebuild Kit
NV4500 Five-Speed (Truck)
Np435 Vs T18
| Type | First Gear | Second Gear | Third Gear | Fourth Gear | Fifth Gear |
|---|
| 1995-2007 | 5.61 | 3.04 | 1.67 | 1.00 | 0.73 |