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Allison 1000/2000

Used 2000-up in GM trucks.

This  is a computer controlled overdrive (five speed) transmission.  In 2006, GM added a six speed version of the 1000 (MW7) with an ADDITIONAL overdrive ratio of .61:1 for a sixth gear.

Gear Ratios for 1000:
3.1:1 1st gear
1.81:1 2nd gear
1.4:1 3rd gear
1.00:1 4th gear
.71:1 5th gear
4.49:1 reverse

Gear Ratios for 2000:
3.51:1 1st gear
1.9:1 2nd gear
1.44:1 3rd gear
1.00:1 4th gear
.74:1 5th gear
5.09:1 reverse

Other specs. for 1000.
Weight (wet): 356#
Maximum engine torque: 590 lb-ft
Maximum engine power: 340 HP
Maximum GVW: 19,850#
Maximum GCW: 22,000#
Maximum cooler flow: 6 GPM

Other specs. for 2000.
Weight (wet): ????
Maximum engine torque: ?????
Maximum engine power: ?????
Maximum GVW: 30,000#
Maximum GCW: ???????
Maximum cooler flow: ?? GPM

 


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