Merchant Automotive Maximum Allison Transmission Work Series DIY Kit, LMM | 2007.5 - 2010

LMM Work Series Transmission Kit
Fits 2007.5–2010 GM LMM Duramax with Allison 1000 6-Speed

Strengthen the backbone of your 2007.5–2010 LMM Duramax with the Work Series Transmission Kit, designed to deliver proven durability and performance for both work and play. Based on the trusted Allison 1000 6-speed platform, this kit is built to handle the demands of towing, daily driving, and mild performance upgrades.

Whether your truck is stock or running light modifications, this kit offers improved clutch holding power, smoother shifts, and long-term reliability — giving your transmission the reinforcement it needs under load and over the long haul.

Kit Highlights

• Direct fit for 2007.5–2010 LMM Duramax with Allison 1000 6-speed
• Ideal for stock and mildly modified trucks
• Upgraded clutch components increase holding capacity
• Heavy-duty C1–C5 frictions and steels
• TransGo Jr. shift kit for enhanced shift feel and transmission life
• Merchant Automotive deep pan with filter lock system
• Includes key bushings, bearings, gaskets, and valve body upgrades for a complete rebuild

Kit Contents

Transmission Internals

• Allison T2 Bearing
• Allison 1000 T3–T5 Bearing
• Allison T4 Bearing
• Allison 1000 Front Pump Bushing
• Allison Stator Support Bushing
• Allison 1000 T1 & T6 Bearing x2
• Allison T5 Bearing
• Allison 6-Speed Overhaul Kit
• Transfer Case to Transmission Adapter Gasket
• Pipe Thread Sealant Tape
• Allison Cut Back Valve
• Allison 1000 P1 Drive Flange

Clutch Packs

• C1 Friction x6
• C2 Friction x6
• C3/C4 Friction x9
• C5 Friction x6
• Alto Allison Piston Kit 
• C1 Apply Plate x6
• C2 Steels x7
• C3/C4 Apply Pressure Plate x2
• C3/C4 Steels x7
• C5 Steels x6

Upgrades & Components

• Allison 1000 Deep Pan Kit with Merchant Automotive Deep Filter Lock
• PTO Billet Side Cover, Work Series x2
• Allison Pressure Switch Assembly
• Valve Body Kit
• Allison 1000 Pass-Through Connector Body & O-Ring
• TransGo Allison Jr. Shift Kit
• Transmission Pressure Regulator Spring Service Tool
• Trim Springs “A” & “B” x2

Built for strength, tuned for reliability — the Work Series Transmission Kit gives your LMM the transmission foundation it needs for confident shifting and consistent performance, whether you're hauling loads, daily driving, or adding mild power upgrades.