MAximum Work Series Transmission Kit, Allison 1000, LB7, 2001-2004

Designed to optimize the potential of the Allison transmission even with additional power
Designed to optimize the potential of the Allison transmission even with additional power
Price Range:   $1,295.00 - $2,940.00
Billet Converter Options: 
Valve Body Options: 
Select Options
Merchant Automotive has a long history of building transmissions for customers from all over the country who depend on their truck for many types of applications. The components in the Maximum transmission kits were selected specifically based on our experience working exclusively on the GM Duramax trucks with an Allison transmission.

Why the Work Series?

If you depend on your truck to be there when it counts, the Maximum Work Series Transmission is for you!

Designed to optimize the potential of the Allison transmission even with additional power.  Still maintains the smoothness of a stock transmission for everyday use with increased holding capacity when it counts the most.  Includes everything you need to not only upgrade the transmission, but rebuild it as well.  A truly complete kit to get you back on the road worry free.

Kit includes

  • C1-C5 frictions with improved material
  • C1-C5 Steels
  • Hydraulic improvements to increase and maintain line pressure which increase clutch pack clamping force and improves convertor holding power.
  • Smoother apply into drive from park or reverse
  • Increased C2 clutch apply pressure improves 5th gear holding capacity
  • Complete gasket and seal kit
  • All new genuine Allison Torrington bearings
  • Select bushings common for wear
  • Deep pan (increases capacity)
  • Allison spin on filter
  • New style deep pan filter with increased filtration capacity and lower flow resctriction
  • Filter lock to ensure filter maintains seal preventing leaks and pressure loss
  • Genuine Allison Pressure Switch, latest design for maximum durability
  • Wire harness connector body and seal to repair common issues and prevent leaks
  • Pressure Regulator Spring Service Tool

Looking for even more?  

Look no further then our Maximum Pro Series.  We take the proven reliability of the Work Series and increase capacity even more with additional clutch apply area, heavy duty friction material, and additional hydraulic pressure to ensure Maximum holding capacity.

Designed for use with engines modified above stock, or aftermarket components (proper tuning and gearing required) .

<: Fitment Chevrolet 2001 2002 2003 2004 GMC 2500HD 3500 Chevy 01 02 03 04 Duramax GM 3/4 1 ton Silverado Sierra Allison 1000 :>

Transfer MORE POWER to the ground with improved torque efficiency
Fully furnace brazed pump and turbine assemble\Steel drive splines
Heavy Duty Torrington enclosed needle bearings
Electronically balanced
Lower operating transmission temperatures
Numerous stall speed combinations available to best suit your vehicle and driving habits
Single disc lock-up design using Raybestos clutch linings
Increase fuel mileage 1 to 3 mpg in most cases
Billet steel front cover

MAximum Valve Bodies are disassembled and ultrasonic cleaned to remove all debris.

Upgraded to support increased line pressure.

Improvements for smoother apply into Drive from Park or Reverse.

New Genuine Allison Pressure Switch.

New Genuine Allison Wire Harness.

Dyno tested to ensure quality control standards

 Average Rating:  5 Star Rating
 based on 3 Customer Reviews  
Write A Review
   Maximum work series rebuild kit with converter, May 13, 2019  By Jon (JOHANNESBURG, MI)(Verified)
Rebuilt a core trans. with this kit in February.
We just installed it this weekend(may 11th).
Can not say enough good about it.From shipping,packaging, customer support,and quality!!
All were excellant. Trans works exactly how it should with no problems.very happy with the entire merchant automotive expierance!!
A big thank you to Merchant !!
And thanks to Matt and Jerry who helped build and install!! Very satisfied customer!!!
   Maximum work series rebuild kit with converter, February 18, 2019  By Jon (JOHANNESBURG, MI)(Verified)
Very pleased with the whole expierance with merchant so far.
Kit was very good quality with more than what i exspected.
2 friends and my self built my core trans with very few issues.customer support was great.
At this time i havnt installed the trans yet,but i am very pleased with everything so far.
   The Highest Quality, at an affordable price!, October 6, 2017  By DYLAN (Rye, NH)(Verified)
Even the packaging shows the care and thought that went into engineering this kit. Installation was straight forward and smooth. Just to give an idea of the detail level, a roll of 1/4" wide Teflon tape is supplied to reseal the PTO cover bolts; just as they came from the factory.

When I order from Merchant Automotive, I expect the highest quality product and this kit is no exception. The research and engineering that went into developing this kit manifests itself by producing the cleanest, most crisp shifting Allison one could ever experience.

Could not be happier. Thanks again!

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