Tremec TUET18131 Magnum XL T56 6-Speed Transmission GM

#91029014

Tremec TUET18131 Magnum XL T56 6-Speed Transmission GM

700 lb-ft torque capacity for high-performance applications
Extended Magnum XL tail housing for proper late-model GM fitment
Direct-mount shifter design for precise, positive gear engagement

Gear Ratio Profile:

Close Ratio / 2.66 1.78 1.30

$3,695.00

/each

In Stock

Quantity

Need Help? Call to Order

Add to a list

Select a vehicle to verify Fitment

Select Vehicle

Product Summary

T56, TKO, TKX, 6-Speed Transmission Speeds

700 lb-ft torque capacity for high-performance applications
Extended Magnum XL tail housing for proper late-model GM fitment
Direct-mount shifter design for precise, positive gear engagement
High RPM capability with smooth shifts up to 7,800+ RPM
Lightweight yet durable construction at approximately 150 lbs

See more details

Key Specs

MFG. Part #	TUET18131
Brand	TREMEC
Transmission Speeds	6-Speed
Input Shaft Spline Count	26
Input Shaft Diameter	1.125"

See more specs

Need To Know

Truck Shipment

Truck shipments must be pre-paid with a credit card, certified check or money order

Need help?

855.313.9176

View the Help Center

Quick and Easy Returns

Return Policy

TREMEC TUET18131 Details

The Tremec TUET18131 Magnum XL T56 6-Speed Transmission is a high-performance aftermarket upgrade derived from the legendary TR-6060, used as factory equipment in many modern Detroit muscle and sports cars. Designed specifically for late-model GM applications, the Magnum XL features an extended-length tail housing that relocates the shifter over 8 inches rearward, making it ideal for vehicles equipped with factory semi-remote shifter systems.

Unlike factory semi-remote designs that reduce shift precision in exchange for vibration dampening, the Magnum XL utilizes a rigid direct-mount shifter with a proprietary shift isolator. This provides an optimal balance of refined NVH control and crisp, precise gear engagement for both street and performance driving.

Engineered to handle serious power, the Magnum XL supports up to 700 lb-ft of torque and delivers smooth shifting at 7,800+ RPM, all while maintaining a relatively light 150 lb dry weight. Its versatile design also allows for modification for custom builds and competitive applications.

700 lb-ft torque capacity for high-performance applications
Extended Magnum XL tail housing for proper late-model GM fitment
Direct-mount shifter design for precise, positive gear engagement
High RPM capability with smooth shifts up to 7,800+ RPM
Lightweight yet durable construction at approximately 150 lbs

Gear Ratios:

1st - 2.66
2nd - 1.78
3rd - 1.30
4th - 1.00
5th - 0.80
6th - 0.63
Reverse - 2.90

Charts

Tremec Transmission Warranty

Warranty Information

Speedway Motors cannot facilitate the return of defective Tremec products as they have requested to handle these directly with the consumer. For defective product support and Return Authorization, please contact Tremec at +1 (800) 401-9866 (USA) or by ema

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

TREMEC TUET18131 Specifications

KEY SPECS
MFG. Part #	TUET18131
Brand	TREMEC
Transmission Speeds	6-Speed
Input Shaft Spline Count	26
Input Shaft Diameter	1.125"

GENERAL
Torque	700 ft./lbs.
Output Shaft Spline Diameter	1.375"
Output Shaft Spline Count	31
Case Material	Aluminum
First Gear Ratio	2.66:1
Gear Ratio (2nd)	1.78:1
Gear Ratio (3rd)	1.30:1
Gear Ratio (4th)	1.00:1
Gear Ratio (5th)	0.80:1
Gear Ratio (6th)	0.63:1
Bellhousing Included	No
Yoke Included	No
Shifter Included	No
Gear Ratio (Reverse)	2.90:1
Sold in Quantity	Each
Yoke Style	Slip On
Shifter Style	Linkage operated

Ratings & Reviews

Be the first to write a review.

Questions & Answers

Be the first to ask a question.