BD Performance Allison 1000 Transmission 04.5-05 6.6L LLY Duramax 4WD

The best diesel transmission made even better! The introduction of the Allison 1000 transmission to the diesel truck market restored confidence in consumers that an automatic transmission can indeed handle the demands of exhaust braking and diesel engine torque. But while the Allison is suitable for stock applications, we've found that it does have its limitations, particularly when flywheel horsepower exceeds 370 horsepower. That's when the stock clutch packs can begin to slip, putting the computer in the dreaded limp home mode.

BD has made numerous modifications to the Allison to suit the demands of high-performance and heavy-duty usage. BD adds 20% more friction material than stock, and increases main line oil pressure to increase clamping force on the clutch packs. These revisions, along with modified trim solenoids, pump, pressure regulator and oil circuitry result in a transmission that can now handle substantially more power than the stock transmission, even under heavily-loaded conditions.

TRANSMISSION DETAILS:

• Increase the durability of your drivetrain

• Revised oil circuits

• Handles up to 300% more power and torque than the stock transmission

• Extra clutches and stronger internals

• BD rigid aluminum heavy duty transmission pan

• Pan adds 3.5qt extra oil capacity

• Pan reduces case flex

• Pan reduces internal oil leakage

• Pan heat-dissipating fins keep temperature down

• Pan magnetic drain plug

• New convertor lock up valve to boost lock-up pressures

• Updated lube

• Updated regulator

• Updated pressure release spring

• 20% more friction surface

• High energy clutch material

• Added extra frictions

• Modified power pistons

• Modified hydraulics

• New return springs

• Increased main line oil pressure

• Modified separator plate for short crisp shifts

• New A & B trim valves, springs and solenoids

• Not warranted for Race or Sled Pull use

• Each transmission is dyno tested

Allison 1000 Clutch Count

CLUTCH

STOCK

BD

C1

6

8

C2

6

7

C3

4

6

C4

5

6

C5

6

7

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.

IMPORTANT NOTE: Torque converter is not included with this transmission package.