SKU: ATS309-984-4308

Lct1000 6 Speed Stage 1 Transmission Package

Ships From Manufacturer in 15-20 Days
Confirmed fitment below
YEARS
2006-2007
MAKE / MODEL
GM /
SERIES
2500HD/3500HD
ENGINE
8.1L Vortec V8
Price
$5,279.99
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PRODUCT DETAIL

Key Features & Description

Features:

  • Stage 1 transmission package for LCT1000 6-speed

  • Designed for improved towing and light performance upgrades

  • Upgraded clutch packs and valve body modifications

  • Enhanced torque handling and shift firmness

  • Maintains drivability with improved durability

  • Ideal for daily drivers and mild power enhancements

Performance Benefits
The ATS 309-984-4308 Stage 1 Package is a reliable upgrade for GM 8.1L 4WD trucks equipped with the LCT1000 6-speed transmission. This entry-level performance kit boosts shift quality and torque capacity without sacrificing daily drivability. Engineered for trucks that tow frequently or run with mild performance mods, this kit delivers smoother gear transitions and longer transmission life under load.

Fitment:
2006, 2007 GM 2500HD/3500HD 4WD 8.1L Vortec V8 with LCT1000 6-Speed Transmission

Warranty
Covered under ATS Diesel Performance’s standard manufacturer warranty. Refer to ATS for complete warranty information.

Fitment Notes:

  • Specifically for GM 8.1L 4WD applications with LCT1000 6-speed

  • Suitable for stock to mildly upgraded engines

  • Professional installation is recommended

Note: $500 Shipping surcharge will be added at checkout

FITMENT GUIDE

Exact Fitment — Verify Your Year

Year RangesYears
Make
Model
Series
Engine
2006-2007
GM
2500HD/3500HD
8.1L Vortec V8

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