B&M Transpak Shift Improver Kit For C4 Automatic Transmission 1970-1982



  • Complete Kit
  • Improves Transmission Life
  • Recalibrates Transmission
  • Fits 1970-1982 C4 Transmission
MSRP $122.00
You save 11%

B&M Transpak Shift Improver Kit for 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981 and 1982 Mustangs with a C4 Automatic Transmission.

Get better, more customized performance out of your 1970-1982 Mustang’s C4 automatic transmission with this B&M (50229) Transpak Shift Improver Kit that’s now available at CJ Pony Parts! 

Features & Benefits:
- Fits 1970-1982 C4 Automatic Transmission
- Complete Kit
- Recalibrates C4 Automatic Transmission for Optimal Performance
- Select Mode that Best Suits Application
- Improves Transmission Life: Transmission Removal Not Required
- Includes All Features of Shift Improver Kit Plus Additional Driver Manual Control
- Allows You to Downshift at Any Speed and Hold Transmission in First Gear to Any Speed You Want: Excellent Asset for Modified Engines When You Want Additional RPMs
- Select Your App. Mode
- Stage 1: For Heavy Duty Street Rods, Normal Passenger Vehicles or Other Heavy-Duty Use (Firmer Feel but Not Harsh; Dramatically Improves Transmission Performance and Life without Loss of Comfort; Normal Automatic Operation When in Drive)
- Stage 2: High-Performance Street for Full Performance Street Use (Essentially the Same as Heavy Duty Mode Except Shift is Much Quicker; Retain Full Automatic Features and Standard Shift Points with Selector in Drive) 

This B&M (50229) Transpak Shift Improver Kit is a complete kit that recalibrates your C4 automatic transmission for optimal performance. You can select the mode that best suits your application, and the end result is an improved transmission life! You don’t even need to remove your transmission to install this kit! This shift improver kit lets you downshift at any speed and hold the transmission in first gear to any speed you want, which is a great asset for modified engines when you want additional RPMs.

This Kit Includes:
- Shift Improver Gaskets
- Drill Bits
- Transmission Seals
- Retaining Ring
- Brass Plugs
- Shift Valve

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Vehicle Fitment

This product will fit the following Mustang years:

Only registered users can ask/answer questions. Please sign in or create an account.
Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account