TREMEC Magnum XL GM 6-Speed Wide Ratio Transmission – TUET18132 (0.63 6th Gear)

Built for Big Torque. Tuned for Street Versatility.

The TREMEC Magnum XL TUET18132 brings the legendary performance of the TR-6060-based Magnum series to the aftermarket with a configuration built specifically for modern GM platforms. With a wide-ratio gear set and rearward shifter positioning, this transmission is designed for street-driven performance builds that demand power, comfort, and control.

Featuring a unique extended-length tail housing, the Magnum XL moves the shifter over 8 inches farther back than a standard Magnum—perfect for modern chassis where factory-style transmissions just don’t fit or feel right. Unlike bolt-on semi-remote shifters that sacrifice performance for NVH control, the Magnum XL delivers a direct-mount, isolated shifter that offers both refined noise/vibration dampening and razor-sharp shifting.

With 700 lb-ft torque capacity and support for 7800 RPM shifts, the TUET18132 is built to take abuse—on the street, at the track, or wherever your project demands performance and reliability.

Wide-Ratio Gear Set – Ideal for Torque-Rich Builds:

• 1st: 2.97

• 2nd: 2.10

• 3rd: 1.46

• 4th: 1.00

• 5th: 0.80

• 6th: 0.63 (Highway Overdrive)

• Reverse: 2.90

Key Features:

• GM Magnum XL Wide-Ratio 6-Speed Transmission

• Extended Tail Housing – Shifter positioned 8+ inches farther back for modern chassis compatibility

• Direct-Mount Isolated Shifter – Exceptional shift feel with reduced NVH

• Rated for 700 lb-ft Torque – Built for high-output engines

• Supports 7800 RPM Shifts – High-revving performance without compromise

• Aftermarket upgrade based on the proven TR-6060 architecture

Why Choose the TREMEC Magnum XL TUET18132?

Designed to meet the real-world needs of builders and drivers, the Magnum XL TUET18132 is the solution for modern GM-based builds that require a manual transmission capable of withstanding high torque, offering street-friendly gearing without sacrificing high-performance feel.

Its wide-ratio gear set is perfect for naturally aspirated or forced-induction engines that deliver lots of low-end torque, while the 0.63 overdrive gear keeps RPMs low on the highway for long-distance comfort and fuel savings.

Whether you're building a high-torque cruiser, a restomod, or a custom track-ready street car, this transmission offers a bulletproof drivetrain foundation that delivers every time you hit the clutch.

Precision Meets Power. The Ultimate GM Manual Transmission Upgrade.

The TREMEC Magnum XL TUET18132 redefines what a manual transmission can be for GM performance platforms—refined, durable, and ready for whatever you throw at it.

Perfect For:

• GM-based performance builds

• LS, LT, or high-torque engine platforms

• Wide-ratio gear preference for versatile street/track use

• Manual transmission swaps or restomod upgrades

• High-RPM, high-output applications