ATS Diesel Performance
ATS Stage 3 Transmission Package 04.5-05 6.6L GM Duramax LLY
MPN: 3098324290
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…
Street Performance
$7,809.99
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Warranty
Warranty Information Pending
Warranty information has not yet been provided for this product. Contact FullSpecDiesel for help locating the applicable manufacturer or supplier warranty.
View complete warrantyThe 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
✅
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
✅
Product conditions
Professional installation is recommended.
Nonreturnable product — Made to order for your configuration.
- Return eligibility
- Nonreturnable
- Return window
- Not returnable
- Restocking fee
- Not applicable
- Return shipping
- Not applicable
- Made to order
- Yes — production confirmed after payment
- Backorder status
- Not backordered
- Cancellation
- Cannot be canceled after production is confirmed and payment is captured
- Warranty provider
- Warranty Information Pending
- Warranty duration
- Pending verification
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–7 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- Signature delivery required
- Supplier
- ATS Diesel Performance
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.