Allison 1000 Transmission

 

The Allison 1000 was built in 5 & 6 speed versions, the latter introduced in 2005. Though not without its weaknesses, the Allison is built on a strong foundation and a popular transmission amongst diesel truck owners.

(More information for the 5-speed version of the Allison transmission will be updated soon).

 

Allison 1000 Transmission Specifications:

 

1st Gear Ratio	2nd Gear Ratio	3rd Gear Ratio	4th Gear Ratio	5th Gear Ratio	6th Gear Ratio	Reverse Gear Ratio
3.10	1.81	1.41	1.00	0.71	0.61*	4.49

* 6th gear only available in 2005 - present Allison 1000 transmissions. Prior to 2005, all Allison 1000 transmissions were 5-speeds.

 

Allison 1000 Features (6-speed version, 2005 - present):

• 2 overdrive gears for better fuel economy. At 60 mph, the 6-speed Allison equipped truck cruises at 1,550 RPM (compared to the 5-speed versions 1,800 RPM engine speed at 60 mph)
• Manual shift mode, where buttons located on the column are used to manually shift gears.
• Tow/Haul mode for precison trailer control.
• 2 overdrive gears
• Die cast aluminum construction.
• DEXRON® VI automatic transmission fluid
• Allison 1000 weighs 330 lbs.
• Torque converter locks for gears 3 - 6. Gears 1 & 2 operate in both locked & unlocked torque converter modes.
• Adaptive shifting; the transmission "learns" from a driver's inputs & adjusts transmission shifting events to meet driver specific driving patterns.
• Cold operation mode that allows the engine to rev higher until the engine & transmission have reached ideal operating temperature.