MDL TREMEC GM TKX 5-Speed | 2.87 First, 0.68 OD | 2” Left Side Shift Rear, 1” or 1.5” Forward Offset

Key Features

• 600 lb-ft torque capacity with 7,500 RPM shift capability and 8,000 RPM engine speed rating
• Gearing ratio (2.87, 1.89, 1.28, 1.00, 0.68) - deep overdrive drops highway RPM for improved cruising
• 26-spline input shaft (1-1/8 in. diameter) and 31-spline output shaft for added strength
• Compact end-loaded aluminum case fits most GM tunnels without floor modifications
• Ribbed 3-piece housing (main case, intermediate plate, rear extension) for structural stiffness
• Multi-cone synchronizers with sintered carbon/bronze hybrid rings for smooth high-RPM shifts
• ASTM 4615 special-grade steel gears and shafts with caged needle bearings in all gear positions
• GM Muncie bellhousing bolt pattern - direct swap for 3-speed and 4-speed applications
• GM 0.590-inch pilot tip with 1.375-inch OD throwout bearing guide tube
• Built-in reverse light switch and cruise control safety switch
• Dual speedometer outputs: mechanical 7-tooth Ford gear (adaptable to GM) plus OSS two-wire analog sensor
• 99 lbs dry weight; 2.7-quart fluid capacity
• High-performance short-throw billet aluminum shifter included
• MDL side shift modification with a 1” or 1.5” forward offset stub - precise shifter placement without compromise
• Shifter Stub Location: 2” left of center line, 18.02” or 18.52” back from the bellhousing face
• MDL Exclusive - not available through TREMEC

Description

Console cars, bench seat trucks, and custom builds often demand shifter placement that factory positioning simply cannot deliver. This MDL-modified TREMEC TKX solves that problem with a professionally configured 1" or 1.5" forward offset stub that repositions the shifter exactly where your driving position and interior layout require it. The rear-mounted, side-shift configuration moves the stick forward from the standard location while maintaining the structural integrity of the transmission architecture.

The TKX platform represents TREMEC's ground-up redesign specifically for the aftermarket, delivering 600 lb-ft torque capacity and clean shifts at 7,500 RPM. Unlike the older TKO series, the TKX's multi-cone synchronizers with sintered bronze and carbon hybrid rings eliminate the notchy, balky gate feel that plagued high-RPM shifting. The close-ratio gear set (2.87 first, 0.68 overdrive) provides aggressive acceleration for spirited driving while the deep overdrive drops highway RPM significantly for comfortable cruising.

TREMEC designed the TKX case specifically to fit within narrow classic GM tunnels. The compact, end-loaded three-piece aluminum housing clears '68-'72 Chevelle tunnels and fits GM A-bodies including Chevelle, GTO, Cutlass, Nova, and Camaro without floor modifications. The ribbed aluminum construction provides outstanding structural stiffness while keeping dry weight at just 99 lbs. All mating surfaces are sealed with gaskets to eliminate fluid leaks, and caged needle bearings in all gear positions reduce end play for long-term durability.

This GM-pattern TKX bolts directly to GM 3 and 4-speed Muncie bellhousing patterns, making it a direct upgrade path from factory four-speeds. The 26-spline input shaft matches common clutch disc configurations, while the 31-spline output shaft handles serious torque loads. Built-in mechanical and electronic speedometer outputs, reverse light switch, and neutral safety switch round out the factory-quality integration. Recommended lubricant is Dexron III ATF, TREMEC HP-MTF, or Mobil 1 Synthetic ATF.

Kit Includes

• TREMEC TKX 5-speed transmission (TCET17805) with 2.87/1.89/1.28/1.00/0.68 gear ratios
• High-performance short-throw billet aluminum shifter (2” left side shift front, 1” or 1.5” forward offset stub)
• Gaskets for all mating surfaces
• Built-in reverse light switch (left side)
• Built-in cruise control safety switch (right side)
• Mechanical speedometer drive gear (7-tooth Ford pattern, adaptable to GM)
• OSS two-wire analog speedometer sensor
• MDL extended warranty: manufacturer warranty plus 1 additional year with 1-year grace period
• Lifetime technical support