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THM400 TH400 400 3L80 Transgo 400-1&2 Reprogramming Shift Kit (SK400-1&2)

by TransGo
SKU T34169
Original price $90.00 - Original price $90.00
Original price
$90.00 - $90.00
Current price $90.00
in stock, ready to be shipped

Delivery time

You will receive your package in 2–5 business days within the contiguous U.S.

Brand: Transgo

Other Part Number: TRG-400-1&2

Type: Shift Kit

Interchange Part Number: T34169

Manufacturer Warranty: Yes

Manufacturer Part Number: 400-1&2

Country of Manufacture: United States

Surface Finish: Professional Grade

Country/Region of Manufacture: United States

Universal Fitment: Yes

Vintage Part: No

Performance Part: Yes

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

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

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