SKU: 6268096816

ATS Stage 5 Transmission Package 04.5-05 GM 6.6L Duramax LLY

Sale price$4731.74 Regular price$5257.49
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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16

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Description

ATS Stage 5 Transmission Package 04.5-05 GM 6.6L 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.

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 5 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 5 also includes the ATS Billet Input Shaft, ATS Billet Output Shaft and ATS Billet Intermediate Shaft. On 2wd models, the ATS Billet P2 Carrier, C2 Hub and P1 Sungear are also incuded. In competition applications (drag racing/sledpulling) the stock output shaft can break when launching. ATS includes a billet 300M output shaft to eliminate this point of weakness.

WARRANTY INFORMATION: As with all ATS Transmission Packages, this transmission is covered by a 5 year / 500,000 mile warranty. In order to be eligible for this warranty, all paperwork must be filled out upon installation of the transmission and returned to ATS, to include verifying line pressure with a mechanical gauge or scan tool.

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: 6268096816

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BPrincess
Phoenix, US
★★★★★ 5
Perfect addition to my wardrobe
Color: Chrome Silver
I purchased the silver clutch to wear with a lavender dress for a recent wedding. I wanted a style that I figured all of the girlies wouldn’t be wearing, I also didn’t want to spend too much. This may seem odd, but I’m plus size, and didn’t want to carry a tiny purse with my frame. This was perfect! I loved the metallic shade. It had a slight sheen to it, which made it look upscale. There’s slots on the inside to hold the necessary license and bank card.. The purse held everything I needed for the evening, even the card for the newlyweds! You will not be let down with this one!
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Reviewed in the United States on June 7, 2024
P
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Patricia Farran
Omaha, US
★★★★★ 5
My new wedding clutch
Color: Pinkish Brown
Perfect size, color for an upcoming wedding. Well made !!!
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Reviewed in the United States on June 2, 2026
J
Verified Purchase
JBVanD
Dallas, US
★★★★★ 5
Stunning clutch
Color: Champagne Gold-satin
Absolutely gorgeous. Even my husband commented on it and he never comments on purses. It will hold everything you need for a formal night out.
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Reviewed in the United States on May 26, 2026
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Jacqueline F.
Waukegan, US
★★★★★ 5
Elegant Hand Clutch
Color: Champagne Gold-satin
Phone will indeed fit inside, beautiful to carry or put on the chain, color was a little lighter than I thought champagne would have been; however, it worked very well. Will last for years details were very good.
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Reviewed in the United States on April 15, 2026
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Carol
New York, US
★★★★★ 4
Ok bags for the price
Color: Cream-woven
Disappointed gold looks cheap. Gold edging is very thin looking. There’s no puff at all to the weave. Returning the one with gold trim. *** Now, for the one that they call White with the silver trim this to me has a nicer look. The white is not a true white so if you’re looking for a true white,as I was, this is not it. It’s more of an off-white creamy tone. Not white as pictured. The silver of the clasp has a slightly aged tone to it. I think it would be prettier if it was a shiny silver, Clasp is nice and smooth to open and close. On both colors. I do think the white is a nice summer bag and could be used casually with jeans and a T-shirt.
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Reviewed in the United States on March 6, 2025

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