Modified TREMEC T5Z 5-Speed | 1974-1978 Ford Mustang II | 4.850" Bearing Retainer

Key Features

• Custom 4.850" OD steel bearing retainer machined specifically for Mustang II bellhousing fitment
• 330 ft-lb torque capacity - handles up to 450 hp on street tires
• 2.95 first gear ratio for strong launch performance
• 0.63 overdrive drops cruise RPM for improved fuel economy and reduced engine wear
• World Class internals with carbon fiber synchronizer rings on gears 1-4
• 10-spline input shaft (1-1/16" diameter) and 28-spline output shaft
• Steel front bearing retainer with Cobra-style pocket bearing
• Tapered carrier bearings and main needle bearings throughout
• Ford speedometer drive with 7-tooth gear (6 and 8-tooth available)
• High-performance short-throw billet aluminum shifter included
• Shifter Stub Location is on center line with a 1.65” or 2.15” backward offset stub. 21.15” or 21.75” back from the bellhousing face
• Uses GM transmission mount (MD-604-1102, sold separately)
• 2.75 quarts ATF Dexron III fluid capacity
• Just 75 lbs dry - TREMEC's most compact transmission
• Optional 0.73 overdrive ratio available

Description

Dropping a T5 into a 1974-1978 Mustang II has always meant wrestling with bellhousing mismatches and adapter sleeves. This MDL-modified TREMEC T5Z eliminates the problem at the source: a custom steel bearing retainer machined to 4.850" outer diameter specifically for the Mustang II's unique bellhousing register bore. No adapters, no guesswork - just bolt it in and go.

Inside, this is a Z-specification World Class T5 with all the upgrades that designation implies. Tapered carrier bearings and main needle bearings reduce friction and ensure precise gear mesh, while carbon fiber synchronizer rings on gears one through four deliver crisp engagement and outlast brass alternatives. The Cobra-style pocketed input bearing handles radial loads better than conventional designs, and the steel front bearing retainer adds durability where it counts.

With a conservative 330 ft-lb torque rating, this transmission comfortably handles small-block Ford V8 builds up to 450 horsepower on street tires. It's also an ideal upgrade path for inline-four and six-cylinder Mustang IIs looking for modern drivability. The 2.95 first gear provides aggressive launch characteristics, while the 0.63 overdrive drops engine RPM by 37% at highway speeds - reducing heat, wear, noise, and fuel consumption. The 2" rear shifter offset places the shift lever exactly where Ford intended in the Mustang II cockpit.

At just 75 lbs dry, the T5 remains the most compact and lightweight TREMEC transmission available - critical in the tight Mustang II engine bay. Requires 2.75 quarts of ATF Dexron III. A 7-tooth speedometer drive gear is installed, with optional 6 or 8-tooth gears available for specific axle ratio combinations.

Note: This product is currently out of stock. MDL is working on a solution to bring it back to market. Call 208-453-9800 for details.

Kit Includes

• TREMEC T5Z World Class 5-speed transmission assembly
• Custom 4.850" OD steel front bearing retainer (installed)
• Cobra-style pocketed input bearing (installed)
• Carbon fiber synchronizer rings, 1st-4th gears (installed)
• 10-spline input shaft (installed)
• 28-spline output shaft (installed)
• 7-tooth speedometer drive gear (installed)
• 2-inch rear offset shifter mechanism
• Installation instructions
• MDL lifetime technical support