SKU: 75104374648

ATS Stage 6 Transmission Package 07.5-10 GM 6.6L Duramax LMM

Sale price$5078.24 Regular price$5642.49
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Description

ATS Stage 6 Transmission Package 07.5-10 GM 6.6L Duramax LMMThe Allison 1000 has no doubt proven itself since its mating in 2001 behind the first Duramax equipped GM trucks. Its longevity, even when pushed with moderately heavy loads and higher horsepower, has put it at the forefront of transmissions until recently. However, as miles and horsepower accumulate, these transmissions will find their failure points, and ATS has the cure to ensure your horsepower is getting to the ground efficiently. By increasing

The Allison 1000 has no doubt proven itself since its mating in 2001 behind the first Duramax-equipped GM trucks. Its longevity, even when pushed with moderately heavy loads and higher horsepower, has put it at the forefront of transmissions until recently. However, as miles and horsepower accumulate, these transmissions will find their failure points, and ATS has the cure to ensure your horsepower is getting to the ground efficiently.

By increasing the capability of the torque converter, clutch surface area, and line pressure, the transmission can hold 200% more torque than stock. The result is a setup strong enough to handle aftermarket fueling, turbo(s), and tuning, yet is still smooth enough to tow and daily drive with.

ATS Extreme Allison Packages include proprietary modifications to the drums and pistons. ATS has found these modifications necessary when power goes over 700hp at the tires. In addition, the pump is also modified more extensively for increased line pressure. When coupled with the Co-Pilot (standard on all Extreme Packages), line pressure in excess of 300 PSI is achieved, which is needed to prevent clutch slippage.

The Stage 6 features the addition of the ATS Co-Pilot Transmission Controller. The controller dynamically raises line pressure electronically for additional clamping force on the clutch packs. This prevents slip under high-horsepower / high torque situations, such as drag racing, sled pulling, or low-speed trailer towing. Shift firmness can be adjusted with the push of a button, so the driver can adjust shift feel in a matter of seconds. The Co-Pilot is designed for trucks at any power level, but becomes crucial at 600+ hp at the tires.

The Stage 6 also includes the ATS Billet Input Shaft, ATS Billet Output Shaft, and ATS Billet Intermediate Shaft. The ATS Billet P2 Carrier, C2 Hub, and P1 Sungear are also included. In competition applications (drag racing/sled pulling), the stock output shaft can break when launching. ATS includes a billet 300M output shaft to eliminate this point of weakness.

SHIPPING POLICY - Due to the size and weight of transmissions, they cannot be shipped through traditional couriers, such as UPS, FedEx, USPS, etc., and MUST be shipped via truck freight. We do not offer free shipping on transmissions, however, we do offer a very competitive rate charged at checkout. Once your core transmission is ready for pick up, you just need to give us a call or send us an e-mail with your original order number and the core tag on the transmission, and we can supply you with a quote on the return shipping, as that is not covered in the original shipping cost. Otherwise, we give you the option to coordinate the return shipping on your own and independently pay your courier of choice. As always, if you have any questions, give us a call or send us an e-mail.

ATS GM 6.6L Duramax 4WD Allison LCT1000 Transmission Package Stage Build Comparison

Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6
Horsepower Rating 550 hp 650 hp 750 hp 850 hp 950 hp 1050 hp
ATS Allison LCT1000 Transmission
Five-Star® Torque Converter
Deep Pan Transmission Pan
Co-Pilot® Transmission Controller
ATS Billet Input Shaft
ATS Billet Intermediate Shaft
ATS Billet Output Shaft
Billet P2 Carrier, C2 Hub, P1 Sungear

ATS GM 6.6L Duramax 2WD Allison LCT1000 Transmission Package Stage Build Comparison

Stage 1 Stage 2 Stage 3 Stage 4 Stage 5
Horsepower Rating 550 hp 650 hp 750 hp 850 hp 950 hp
ATS Allison LCT1000 Transmission
Five-Star® Torque Converter
Deep Pan Transmission Pan
Co-Pilot® Transmission Controller
ATS Billet Input Shaft
ATS Billet Intermediate Shaft
Billet P2 Carrier, C2 Hub, P1 Sungear
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 75104374648

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Reviewed in the United States on June 8, 2026
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Anna T
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As advertised for once! Lol
Color: Cooling Blue Cover, Size: Queen (Pack of 2), Color: Cooling Blue Cover, Size: Queen (Pack of 2)
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Lana Cannon
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