TM-387 Magnum 6-Speed Transmission Conversion (Manual to Manual) 80-81

Everything needed for converting your original 4-speed 1980-1981 Corvette to a Tremec 6-speed manual transmission – perfect for those who desire improved performance, increased drivability while maintaining the stock look and feel.

Kit includes Tremec Magnum 6-speed OD transmission with custom machined PerfectFit side-mount shifter, transmission cross-member bracket, speedometer cable/adapter, 6-speed console emblem, reverse light adapter and dynamically balanced lightweight custom driveshaft with quick release slip yoke and u-joints. This transmission kit includes detailed instructions to complete the installation.

Tremec T56 Magnum kits have dominated the marketplace for well over a decade now. The PerfectFit Tremec conversions not only add value to classic cars but they provide unparalleled drivability without compromise to the original, factory looks. The Magnum 6-speed transmission is capable of handling 700lb-ft torque while handling shifts up to 7,800 rpms. Single rail, shift guide plate design means you’ll never miss a shift! Fully synchronized – even in reverse. Interchangeable with both mechanical or hydraulic clutch actuators without tearing tear down the transmission. Great for everyday use – short, crisp shifts and a rewarding driving experience. 1-year warranty with a 2-year installation window. Tremec Magnum gear ratio 2.66, 1.78, 1.30, 1.00, 0.80, 0.63 or 2.97, 2.10, 1.46, 1.00, 0.74, 0.50. Specify final gear ration when ordering.

What to expect when converting your 1968-1982 Corvette to the Tremec Magnum 6-speed transmission:

• 30-50% increase in fuel economy
• Low RPM cruising for greatly reduced driver fatigue and an improved highway driving experience. Road trips are fun again!
• Reduced engine wear leading to longer engine life
• Cooler engine operating temperatures
• Reduced NVH (noise – vibration – harshness)

Magnum 6-speed PerfectFit Kit Components Overview

• T56 Magnum 6-speed Transmission – 700 torque capacity wide or close ratio
• Perfect Factory Shifter Positioning
• Multicone Synchronizer Blocker Rings are standard for low-effort, high RPM shifts
• CAD Designed Transmission Crossmember – correct driveline angles, compatible with factory exhaust
• Tunnel Patch – makes a tight seal to keep the weather out of your interior console
• Driveshaft & Slip Yoke – Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard
• Speedometer Connection – Mechanical and electronic compatible
• Calibrated Speedo Cable or Electronic Speedo Connector
• Reverse Light Connector
• Pilot Bearing – Super heavy duty needle roller type with lube seal for long life
• Isolator Mount – Rubber for vibration isolation
• 6 Speed Shift Pattern Plate – Maintains original appearance
• Installation Hardware and Detailed Installation Instructions – including free lifetime tech support
• 12 Month Product Warranty – Includes 24-month activation delay so you can finish your project.

Does not include shifter handle – can use your Corvette’s existing bolt-on shifter handle or replace with DCS # TM-391 depending on application.

Tremec conversion are designed for manual to manual conversion. If you want to convert your factory automatic C3 Corvette to a 5 or 6-speed Tremec transmission – you can complete the Tremec conversion by ordering an “automatic to manual” conversion package. See DCS # TM-388 for the automatic to manual conversion. You’ll be good to go from shifting to drive to slamming 1st, 2nd, 3rd, 4th, 5th AND 6th gear before you know it!

This item ships via truck freight; freight charges will be incurred for this item separately from your other items. These charges will be added to your order after it is placed and will not be available at checkout due to variations in destination. You will be contacted with freight charges for approval prior to shipment.