Drivetrain› Manual Transmissions and Components

TREMEC

TKX 5-Speed Transmission GM 26-Spline

$2,895.00

SKU: T04I TCET18083

In Stock
In Stock
Ships by Sep 30
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Overview

The TREMEC TKX 5-Speed Manual Transmission (TCET18083) is a purpose-built performance transmission for the aftermarket. Designed for GM applications, it's ideal for upgrading or restoring GM-powered classic cars, muscle cars, or custom builds. It handles up to 600 lb-ft of torque and shifts cleanly at 7,500 RPM, offering modern durability, improved shift quality, and exceptional drivability. It features a compact, end-loaded design that fits most transmission tunnels, a heavy-duty 3-piece aluminum housing, billet aluminum short-throw shifter, and advanced multi-cone synchronizers.
Show original supplier description

Part #: TCET18083

Transmission - TKX - Manual - 5 Speed - 26 Input Spline - 31 Output Spline - Aluminum - Natural - GM - Each

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

BrandTREMEC
Part NumberT04I TCET18083
5,000+ Trusted brands
1M+ Enthusiasts
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(760) 282-4645 hello@motormia.co

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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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