Merchant Automotive Maximum Allison Transmission Pro Series DIY Kit, LBZ | 2006 - 2007

LBZ Pro Series Transmission Kit
Fits 2006–2007 GM LBZ Duramax with Allison 1000 6-Speed Transmission

For LBZ owners pushing the limits with tuning, turbo upgrades, and hard towing — the Pro Series Transmission Kit delivers the clutch strength, internal durability, and fluid control needed to put down added power without sacrificing reliability.

This kit is engineered for high-performance street and work applications, combining GPZ high-energy frictions, precision-cut steels, and updated pressure plates and pistons. Every component has been selected to support increased torque capacity and cooler, cleaner operation under extreme conditions.

Performance Advantages

• Designed for tuned and upgraded LBZ Duramax trucks
• High-capacity GPZ frictions and steels for increased holding power
• Reinforced apply plates, molded pistons, and return springs for durability
• Includes overhaul kit and supporting hardware for a complete rebuild
• Merchant Automotive Deep Filter Lock system keeps your filter secure under high flow rates

Kit Contents

Friction & Clutch Materials

• GPZ187 C1 Friction, Internal Spline x8
• GPZ192 C1 Friction, External Spline x8
• GPZ175 C2 Friction x7
• GPZ196 C3/C4 Friction x12
• C5 High Energy Frictionx6
• C2 Steel x8
• C3/C4 Steel  x10
• C5 Steel x6
• C1 Alto Top Pressure Plate
• C3 Pressure Plate
• C3/C4 Apply Plate  x2
• C1 Apply Plate 
• C3/C4 Molded Piston Kit (LML-Compatible)
• C3/C4 Piston Return Spring x2
• P1 Planet Shim
• P1 Drive Flange

Transmission Internals & Overhaul

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

Upgrades & Tools

• Allison 1000 Deep Pan Kit with Merchant Automotive Deep Filter Lock
• PTO Billet Side Cover, Pro Series x2
• TransGo Allison Shift Kit, 5-Speed Compatible
• Valve Body Kit (400–800 HP Rated)
• Allison Pressure Switch Assembly
• Transmission Pressure Regulator Spring Service Tool
• Trim Springs “A” and “B” x2
• Allison 1000 Pass Through Connector Body and O-Ring

Whether you're running compound turbos or heavy loads, the LBZ Pro Series Transmission Kit is built to give your Allison the clamping force, cooling, and control it needs to keep up — and keep winning.