Ignitions and Electrical› Computers, Chips, Modules and Programmers

Spelab

TCM Tuning Kit

$1,047.98

SKU: SPCI08599-ES08074-IS08196SR

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Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Professional / shop required

Overview

The Spelab TCM Tuning Kit is a transmission calibration package for 2017-2026 GMC and Chevy 6.6L Duramax L5P trucks. It recalibrates shift timing, shift points, torque converter lockup behavior, and transmission hydraulic line pressure. No physical component replacement is necessary, as it works with your stock T87A or T93 TCM units.
Show original supplier description
The Spelab L5P Transmission (TCM) Tuning Kit provides premium transmission calibrations specifically for 2017–2026 GM Duramax L5P trucks, designed to complement upgraded powertrains. This kit requires only licensing of your factory TCM and uploading pre-built tune files. It precisely recalibrates shift timing, shift points, torque converter lockup behavior, and transmission hydraulic line pressure. This full transmission control module enhancement requires no replacement physical components. The kit is compatible with stock T87A (2017–2019) and T93 (2020–2026) TCM units. Key features include redesigned shift maps to accommodate heavy hauling and daily driving, custom shift point calibration raised or lowered past OEM limits, and precisely calibrated shift timing for smooth, consistent gear changes. It also optimizes torque converter lockup for reduced slippage under load and improved fuel efficiency, while recalibrating transmission line pressure for firmer clutch clamping to reliably handle increased torque output. Specifications include T87A for 2017–2019 models (6 & 10-Speed) and T93 for 2020–2026 models (Diesel only). The kit includes 4 OBD2 tuning credits and requires an OBD 2 Flash Tuning Interface. The intended use is for off-road use only, and it is a final sale, non-refundable item.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSpelab
Part NumberSPCI08599-ES08074-IS08196SR
CategoryIgnitions and Electrical
5,000+ Trusted brands
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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