400-1&2

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

Features:

• 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