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Allison 1000

 GM Allison 1000 Series (MW7) Transmissions

 The Allison was produced as a 5 speed until the 2006 Gen 4 version that added the 6th gear, making it a double overdrive. The 6 speed also added a manual gear selection.

The Allison is a Six speed, rear-wheel-drive, electronically controlled, automatic, double overdrive transmission with torque converter clutch and park pawl.

Additional Features: *Tapshift Range Selection Mode  *Grade Braking    *Cruise Grade Braking   *Tow/Haul Mode    *Shift Stabilization    *Adaptive Shift Controls     *Heater Performance Mode     *Low Traction Mode

Automatic Transmission

Forward Speeds .... 6 

Dates Produced .... 2001 - 2009

Manufacturer .... Allison       

Case Material ... Aluminum       

Output Shaft Spline .... 34 GM 2WD  29 GM 4WD     

1st Gear Ratio .... 3.10 

2nd Gear Ratio .... 1.81

3rd Gear Ratio .... 1.41

4th Gear Ratio .... 1.00

5th Gear Ratio .... 0.71

6th Gear Ratio .... 0.61

Reverse Gear Ratio .... 4.49       

Transmission Weight .... 330

Max Engine Torque .... 620     

Fluid Type ....  Dextron VI

Fluid Capacity ....  13 qts

Power Take Off Capable .... yes 

Gross Vehicle Weight Rated .... 9,200 - 12,000