Allison 1000 M74
1000/M74 2001-2002 Chevy/GMC Silverado and Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2001-2002 Chevy/GMC Silverado/Sierra HD with 6.6L – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2001-2002 Chevy/GMC Silverado/Sierra HD with 8.1L – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2003 Chevy/GMC Silverado and Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2003 Chevy/GMC Silverado and Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2003 Chevy/GMC Silverado and Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2003 Chevy/GMC Silverado/Sierra HD with 6.6L – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2004-2005 Chevy/GMC Silverado and Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2004-2005 Chevy/GMC Silverado and Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2004-2005 Chevy/GMC Silverado and Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2004-2005 Chevy/GMC Silverado and Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2004-2005 Chevy/GMC Silverado/Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2006 Chevy/GMC Silverado and Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2006 Chevy/GMC Silverado and Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2006 Chevy/GMC Silverado/Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2006 Chevy/GMC Silverado/Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2006 Chevy/GMC Silverado/Sierra HD with 6.6L – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
Allison 1000 M74
Allison 1000 M74
1000/M74 2007 Chevy/GMC Silverado/Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2007 Chevy/GMC Silverado/Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2007 Chevy/GMC Silverado/Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2007 Chevy/GMC Silverado/Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2007-2010 Chevy/GMC Sierra 3500HD/Silverado 3500HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2007-2010 Chevy/GMC Silverado/Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2007-2010 Chevy/GMC Silverado/Sierra HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2011-2012 Chevy/GMC Sierra 3500HD/Silverado 3500HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2011-2012 Chevy/GMC Sierra 3500HD/Silverado 3500HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2011-2012 Chevy/GMC Silverado/Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2011-2012 Chevy/GMC Silverado/Sierra HD – Remanufactured 5-Speed Automatic Trans
Allison 1000 M74
1000/M74 2015 Chevy/GMC Sierra 3500HD/Silverado 3500HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
1000/M74 2015-2016 Chevy/GMC Sierra 3500HD/Silverado 3500HD – Remanufactured 6-Speed Automatic Trans
Allison 1000 M74
Allison 1000 M74 Remanufactured 6-Speed Automatic Transmission for Chevrolet And GMC
Signs your Allison 1000 is failing
Catch these early and you replace one transmission, not a transmission and a tow bill.
Clutches worn from heavy towing or added power.
Control module, sensor or solenoid issues.
Speed sensor or wiring faults. Scan the codes first.
Torque converter clutch wear.
Sustained towing can overwhelm the cooling system.
Low fluid in an Allison quickly causes clutch damage.
Used vs. rebuilt vs. reman Allison 1000
| Used | Rebuilt | Remanufactured | |
|---|---|---|---|
| Wear parts replaced | None | Failed parts only | All of them |
| Known weak points addressed | No | Rarely | Yes |
| Testing | "It ran" | Basic | Dyno-tested |
| Typical warranty | 30–90 days | 6–12 months | Up to 5 years |
Allison 1000 questions, answered
What trucks use the Allison 1000?
The Allison 1000 is used in GM heavy-duty trucks and vans, most famously the Silverado and Sierra 2500 and 3500 HD with the 6.6L Duramax, as well as the 8.1L gas V8 and medium-duty Kodiak and TopKick trucks.
Is the Allison 1000 a 5-speed or 6-speed?
Early Allison 1000 units are 5-speeds. GM moved to a 6-speed version starting around the 2006 model year. Match your year and engine before you order.
Can an Allison 1000 handle added power?
It is strong, but added power and heavy towing speed up clutch wear. A remanufactured unit restores factory clutch capacity and is tested before it ships.