SKU: 32022944575

ATS Stage 1 Transmission Package 04.5-05 6.6L GM Duramax LLY

Sale price$2607.74 Regular price$2897.49
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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17

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Description

ATS Stage 1 Transmission Package 04.5-05 6.6L GM Duramax LLYThe 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 have 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 have 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.

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 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: 32022944575

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4.4 ★★★★★
Based on 11 reviews
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Verified Purchase
Mike L.
West Palm Beach, US
★★★★★ 4
Comfortable fit for slip-in fabric shoes
Size: 14, Color: Black/Black
My first experience with Marc Joseph. I typically purchase dress and casual work shoes from Florsheim and occasionally Rockport. I'm giving these four stars because the initial fit and feel appear solid. Depending on the shoe brand I wear a size 14 or 15. My feet are slightly wide but I don't alway need wide fit. These size 14 fit well with wide enough toe box. I've tried slip in shoes before and they just don't feel right. These somehow work and there is no heel slip. My only reservation is the high lip on the heel for slip-in and hope they dont catch pant hems. I gave 4 stars because I'll have to determine durability. Granted they are a light fabric shoe with a soft rubber tread. I'd like them to last for at least 6 months..and use them for business casual work wear during warm weather.
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Reviewed in the United States on May 19, 2026
C
Verified Purchase
Chris
Omaha, US
★★★★★ 5
Stylish and comfortable.
Size: 8 Wide, Color: Black/Black
Shoes look great and fits well. Definitely recommend pocking another pair.
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Reviewed in the United States on May 10, 2026
M
Verified Purchase
Mike
Alexandria, US
★★★★★ 3
Narrow for an 11.5W
Size: 11.5 Wide, Color: Navy
Nice look and material but very narrow for a wide, had to return
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Reviewed in the United States on February 25, 2026
D
Verified Purchase
David Kuck
San Leandro, US
★★★★★ 5
NIce Shoes
Size: 10, Color: Black
Very nice quality and comfort
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Reviewed in the United States on June 1, 2026
E
Verified Purchase
elizabeth a.
Port Orchard, US
★★★★★ 5
Great shoe.
Size: 11.5, Color: Navy
Perfect fit. Stylish comfortable.
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Reviewed in the United States on May 2, 2026

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