The Allison 1000 is a heavy-duty automatic used in GM heavy-duty trucks, including Duramax diesel applications. We carry 1 Allison 1000 transmission with torque converter, from $5,625.00.
About the Allison 1000
The Allison 1000 is the heavy-duty automatic built by Allison Transmission for Chevrolet Silverado and GMC Sierra heavy-duty pickups, most often paired with the Duramax diesel. Early units are five-speeds and later units six-speeds, and the transmission has a strong reputation under heavy towing loads.
Allison 1000 transmissions in stock
| Transmission | Series | Drive | Price |
|---|---|---|---|
| SportMonster Chevy Allison 1000 Transmission & Torque Converter | SportMonster | – | $5,625.00 |
Allison 1000 specifications
- Type: Heavy-duty automatic
- Gear ratios: 3.10 / 1.81 / 1.41 / 1.00 / 0.71 / 0.61 on six-speed units
- Typical use: GM heavy-duty trucks, including Duramax diesel applications
Before you order
Transmissions with the same code can differ in bellhousing pattern, case length, output shaft and wiring between model years and 2WD/4WD. Confirm your year, engine and drivetrain against the listing, or send us your VIN.
Allison 1000 transmission FAQ
What vehicles use the Allison 1000?
The Allison 1000 is used in GM heavy-duty trucks, including Duramax diesel applications. Confirm it on your vehicle with the RPO code or VIN before ordering; what transmission do I have? explains how.
Does a replacement Allison 1000 come with a torque converter?
Yes. Every Allison 1000 transmission we carry is supplied with a torque converter; see each listing for what else is included.
How much is an Allison 1000 transmission?
Our Allison 1000 transmission is $5,625.00, plus a flat $80.00 shipping charge per order. Installation labor is extra; transmission replacement cost explains what to budget for.
What are the Allison 1000 gear ratios?
3.10 / 1.81 / 1.41 / 1.00 / 0.71 / 0.61 on six-speed units.
What transmission fluid does the Allison 1000 use?
Use an Allison-approved fluid or the Dexron fluid GM specifies for the truck. Confirm the specification in your owner’s manual, since it can change with model year and service bulletins; see the transmission fluid chart, transmission fluid types and how to change transmission fluid.
See also: all transmissions by code · how long an Allison 1000 lasts · 6L90 vs Allison 1000 · 68RFE vs Allison 1000 · Allison 1000 problems · how often to change transmission fluid · transmission gear ratios chart · torque converter shudder.
Shipping is a flat $80.00 per order to US addresses, with 15-day free returns. Not sure which one fits? Send us your VIN and a parts specialist will confirm it.