Reprogramming Kit™
with Gear Command™
Fits all 400 1965-on

SKU: 400-1&2 Category:
  1. Distributor Part Numbers
    TransGo 400-1&2
    A & Reds 400-2
    Capital Core NA
    MST 4001&2
    Natpro 400-1&2
    OTS 400-1&2
    PDQ TG-400-1&2
    PNH TG34169
    PTW 400-1&2
    Summit TRG-400-1&2
    Transtar T34169
    WIT T34169
  2. Documents
  3. General Details

    Heavy duty and high performance valve body calibration and  internal upgrades for General Motors TH 400 automatic transmissions.

    • Automatic shift
    • Street or full race
    • Holds 1st and 2nd to any RPM
    • Back-shifts to 2nd and 1st at any RPM
    • Tow&Go™ or competition
    Also Includes:
    • (2) different size 1-2 shift valves
    • Direct clutch high rate return springs
    • Heavy duty intermediate pressure plate snap ring
    • 3rd clutch dual feed separator plate