MDL TREMEC GM TKX 5-Speed | 2.87 First, 0.68 OD | 2” Left Side Shift Rear, 1” or 1.5” Backward 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” backward offset stub - precise shifter placement without compromise
• Shifter Stub Location: 2” left of center line, 20.52” or 21.02” back from the bellhousing face
• MDL Exclusive - not available through TREMEC

Description

MDL's custom-modified TREMEC TKX 17805 solves the challenge of installing a modern 5-speed in GM vehicles requiring specific shift positioning and tight tunnel constraints. TREMEC designed the TKX case specifically to fit within the narrow and short confines of '68-'72 Chevelle tunnels, and MDL's modifications extend that fitment versatility with precision side-shift placement and backward offset capability ranging from 1" or 1.5" backward offset.

This transmission delivers 600 lb-ft of torque capacity while handling engine speeds up to 8,000 RPM with safe shifting at 7,500 RPM. Enhanced gear sizes and revised double-lined, carbon-fiber synchronizer packages eliminate the stiff, notched shifter feel of older transmissions, while special chamfers improve shift quality with dedicated ball detents for each of the three rails. The transmission requires 2.7 quarts of Dexron III ATF, Amsoil ATF, or TREMEC HP-MTF for optimal performance.

The ribbed, 3-piece aluminum housing provides outstanding structural stiffness while the end-loading design creates a slimmer case envelope than top-load predecessors. Oversized gear widths, gaskets at all flanges, and caged needle bearings in all gear positions optimize durability. Tapered roller bearings on input, output, and counter shafts reduce noise while the single-piece countershaft increases torque carrying capacity.

This unit bolts directly to standard GM Muncie 3-speed and 4-speed bellhousings and features a 26-spline input shaft requiring a 26-spline clutch disk. The GM .590-inch pilot tip and 1.375-inch OD throwout bearing guide tube maintain factory compatibility. MDL's custom modifications include the side-shift mechanism positioned for rear socket installation with a 1" or 1.5" backward offset capability, allowing precise shifter placement in challenging installations. Like all TREMEC aftermarket transmissions, this unit is manufactured from 100% brand-new OEM-quality components.

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