Suncoast CAT1 500 HP CUSTOM ALLISON TRANSMISSION WITH CONVERTER 4WD (GMAX-CAT1-LB7-0103-4WD) for 2001-2003 Duramax LB7

$8,505.00

The Sun Coast CAT1 500 HP Allison transmission GMAX-CAT1-LB7-0103-4WD is built for 2001–2003 Duramax LB7 trucks with a 4WD drivetrain. This upgraded transmission handles up to 500 horsepower while improving durability and shift performance. The package includes a matched high-performance torque converter for efficient power transfer. It provides a reliable upgrade for towing, daily driving, and mild performance builds.

Core Charge*

Cores must be shipped within 30 days.

Total: $8,505.00
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Description

Sun Coast CAT1 500 HP Allison Transmission with Converter 4WD

The Sun Coast CAT1 500 HP Allison Transmission GMAX-CAT1-LB7-0103-4WD is a performance transmission upgrade designed for 2001–2003 GM Duramax LB7 trucks equipped with a 4WD drivetrain. This transmission package strengthens the factory Allison platform and provides improved durability for trucks producing higher power levels.

Sun Coast engineered this transmission to support up to 500 horsepower while maintaining reliable drivability. As a result, it works well for trucks used for towing, daily driving, and mild performance upgrades.

Built for Strength and Durability

The Sun Coast CAT1 Allison transmission includes upgraded internal components designed to improve durability over the factory transmission. These upgrades increase clutch holding capacity and help prevent common failures found in stock Allison units.

Improved internal components allow the transmission to handle increased engine output without slipping. This makes the transmission better suited for trucks running performance tuning or heavier towing loads.

Matched High Performance Torque Converter

The transmission package includes a precision-built high-performance torque converter designed to match the upgraded transmission components. The converter improves torque transfer from the engine to the drivetrain.

Better power transfer helps reduce slippage and improves efficiency during acceleration and towing. As a result, the truck delivers smoother performance when pulling heavy loads.

Improved Shift Performance

Sun Coast also recalibrates the transmission to improve shift quality. The updated tuning provides firmer and more consistent gear changes compared to the factory unit.

Improved shift control helps keep the engine within its optimal power band and reduces heat buildup under heavy load conditions.

Designed for LB7 Duramax 4WD Trucks

The Sun Coast CAT1 500 HP Allison transmission is built specifically for 2001–2003 Duramax LB7 trucks with 4WD. The transmission installs as a direct replacement for the factory Allison unit.

Because the package arrives as a complete transmission assembly, installation is straightforward for professional installers.

Key Features

Designed for 2001–2003 Duramax LB7 trucks with 4WD
Handles up to 500 horsepower
Upgraded internal transmission components for improved durability
Increased clutch capacity compared to the factory Allison transmission
High-performance torque converter included
Improved shift quality and drivability
Designed for towing, daily driving, and mild performance upgrades
Direct replacement for the factory Allison transmission


Additional information
Weight 48 lbs
Dimensions 19 × 16 × 13 in
Fitment

Fitment

2001-2004 Duramax LB7

Features

Features

Transmission Features:

  • Constructed With High-Quality Components
  • Dependable Service Life
  • Comes With Torque Converter

Improve Your Off-Road Performance

Get improved transmission performance when you upgrade your transmission to the Suncoast category 1 transmission here at Alligator. Take your rig off-roading to sport your new power and performance with enhanced speeds. This transmission ensures your higher horsepower helps with longer duration use without over exerting your engine and other components under the hood. Feel the difference with your rig’s performance with a quick trip or long weekend off-road with new and improved horsepower.

Note: Allison CAT1 500 Hp Trans With Converter 2001-2003 4WD

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About brand
SunCoast Diesel Performance builds transmission and drivetrain upgrades for diesel trucks. The company focuses on strength, durability, and torque handling. SunCoast diesel transmissions support towing, daily driving, and performance use. SunCoast designs torque converters, valve bodies, and transmission components. These parts help handle increased power and heavy loads. Stronger driveline parts improve reliability under stress. Diesel owners trust the brand for proven transmission solutions. These upgrades perform well in real-world driving conditions.
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