Join Boost Points! It's Like Free Money For Your Duramax!

Merchant Automotive MAximum Allison Transmission Kit - Pro Series | 2001-2004

$1,679.00 - $6,474.00
Call for Availability
1679 - 6474
Boost Points
Join our Boost Points program. It's like free cash toward your purchases!

Torque Converter Options: Required

Transmission Pan: Required

Add Billet Intermediate Shaft: Required

Add Billet C2 Hub: Required

Add Billet Input Shaft: Required

Add Billet Output Shaft: Required

Valve Body Options: Required

Fluid Type: Required

Our Guarantees

Truck Expert a call away The fastest shipping lifetime customer support

Product Information

Our signature line or Maximum Transmissions builds off the proven reliability of the Allison 1000 used in 2001 to Early 2004 GM LB7 Duramax diesel trucks, but vastly improves the performance by incorporating several key upgrades that will unleash your Allisons true potential. 

The Pro Series improves the performance of your Duramax with even greater holding capacity with an additional clutch apply area, heavy duty friction material, and additional hydraulic pressure. If your engine is modified above stock, or aftermarket components (proper tuning and gearing required), then the Maximum Pro Series is for you.


  • Transmission Pro Clutch Kit LB7 LLY #100520
  • PTO Billet Side Covers, Pro Series, Pair, LB7/LLY/LBZ/LMM/LML/L5P, 2001-2017 #10629-P
  • Transmission Pressure Regulator Spring Service Tool, LB7 LLY LBZ LMM LML L5P, 2001-2017, Allison 1000 #10693
  • Transmission sub kit LB7 A kit #100500

Reviews & Questions