MDL TREMEC GM TKX 5-Speed | 2.87 First, 0.68 OD | 2” Left Side Shift Front Shifter, 1” or 1.5” Backward Offset Stub

Key Features

• 600 lb-ft torque capacity with 7,500 RPM shift capability and 8,000 RPM engine speed rating
• Close-ratio gearing (2.87, 1.89, 1.28, 1.00, 0.68) balances strong launches with relaxed highway 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” backward offset stub - precise shifter placement without compromise
• Shifter Stub Location: 2” left of center line, 17.75” or 18.25” back from the bellhousing face
• MDL Exclusive - not available through TREMEC

Description

Getting the shifter exactly where you need it in a custom truck or hot rod build can be the difference between a project that works and one that fights you every mile. This MDL-modified TREMEC TKX solves that problem with a professionally machined side shifter featuring front socket configuration and a precisely calibrated 1" or 1.5" backward offset shift stub. The tall turret body is specifically engineered for applications where standard turret heights create clearance issues--a common headache in truck and hot rod builds where the transmission tunnel, console, or seat placement demands flexibility the factory configuration cannot provide.

At its core, this is TREMEC's proven TKX platform--the slimmest 5-speed on the market, purpose-built for aftermarket applications from the ground up. The close-ratio 2.87 first gear paired with 0.68 overdrive fifth delivers the ideal balance of acceleration and highway cruising efficiency. All gears and shafts are manufactured from special-grade ASTM 4615 steel, while oversized gear widths and caged needle bearings in all positions ensure long-term durability. Multi-cone synchronizers with hybrid sintered bronze and carbon rings deliver smooth, crisp shifts even at the 7,500 RPM ceiling.

The end-loading case design isn't just about strength--though the ribbed three-piece aluminum housing delivers outstanding structural stiffness--it's about fitting where old-school 4-speeds used to live. The TKX slides into GM A-body tunnels (Chevelle, GTO, Cutlass, Nova, Camaro) without modification and uses the same GM Muncie bellhousing bolt pattern your existing hardware already fits. Dual speedometer outputs (mechanical 7-tooth cable drive plus analog electronic sensor) give you options for factory-style instrumentation or modern gauge clusters.

This configuration is not available through TREMEC--it's an MDL exclusive, modified at our Caldwell, Idaho facility. Fluid capacity is 2.7 quarts; TREMEC recommends HP-MTF, Dexron III, GM Synchromesh, Mobil 1 Synthetic ATF, or Pennzoil Synchromesh.

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” 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