1966-70 Mopar B-body TKX 5-speed kit

SKU: PFCH-20003 Category:

1966-70 Mopar B-body 5-speed kit

Request A Quote


If you don't know what you need, call our technical sales staff at 931-646-4836


MOPAR B-body 5-speed kit

B-body Kit includes:

  • B-Body specific mid-shift conversion. 
  • White Lightning Shifter Mechanism for B-body – Provides short, quick shifting, all billet construction
  • 3.5″ Seamless DOM Driveshaft – Race balanced, solid u-joints
  • Driveshaft Slip Yoke – Cryogenically hardened
  • Bolt-In Crossmember – Black powder coat, uses original bolt holes
  • Isolator Mount – Polyurethane
  • Speedometer Solution – Mechanical or Electronic
  • Conversion Pilot Bearing – Works in manual and automatic cranks
  • Conversion Release Bearing – Compatible with OE clutch fork,
  • Weatherseal Reverse Light Harness,
  • Hardware, Complete Instructions and Industry Leading Warranty 

NOTE: Requires engine specific bell housing. Specify console or non-console when ordering.

Some modifications to tunnel might be required 

Featuring the new Tremec TKX 5-speed manual transmission 

  • Rated for up to 600 ft-lbs of torque
  • Just 99lbs (dry)
  • Input Shaft: 26 Spline
  • Output Shaft: 31 Spline
  • Multiple shifter locations & dual speedo pick-ups for extreme versatility
  • Robust 3-rail internal shift mechanism offers firm, positive shifts
  • Recommended for street use and low rpm highway cruising
  • Comes with American Powertrain’s industry leading 2 year warranty

The Tremec TKX series of 5-speed transmissions are a great way to add an overdrive transmission to your project.  Designed and built as a direct replacement for the Ford and GM factory 4-speeds, this line of 5-speeds will likely fit your original bell housing, and in most cases utilize the factory flywheel, pressure plate, and mechanical clutch linkage if they are all in good condition.  Some conversions will only require a new 26 spline clutch disc, slip yoke/shortened driveshaft, and cross member relocation. American Powertrain has a variety of shifter stub relocation kits available to allow you to retain your factory 4-speed console or shift lever location. The TKO series has 3 different shift locations available and is also equipped with the ability to give you a mechanical or electronic speedometer output, built-in neutral safety and reverse light switches. There are multiple gear set options to accommodate a wide range of rear gear ratios and tire sizes, as well as  600ft/lb. constant torque rating to put your power to the ground. Its compact size also allows it to fit most cars without transmission tunnel modifications. American Powertrain can also do case streamlining for applications that have small tunnels. Transmission strength upgrades are also available with our Extreme upgrade.  If you have any questions please give us a call before you buy. 931-646-4836.

TKX Gear Ratios

Wide Ratio – 3.27, 1.98, 1.34, 1.00, 0.72
Close Ratio – 2.87, 1.89, 1.28, 1.00, 0.68 OR 0.81 5th



Weight: 46 lbs

Dimensions: W8" x H16" x L16"

If you don't know what you need, call our technical sales staff at 931-646-4836