The TCI 224300 replaces the stock pressure regulator spring in a GM TH400 transmission. It restores the standard pressure regulator spring rate; for a higher-pressure option, TCI offers spring 221600.
- Type: pressure regulator spring
- Transmission fit: GM TH400
- Function: replaces the stock pressure regulator spring
- Related: 221600 (high-pressure spring)
- Part number: 224300
FAQ
What does the 224300 replace?
The stock pressure regulator spring in a GM TH400 transmission.
Is there a higher-pressure option?
Yes, TCI spring 221600 is the high-pressure version.
Which transmission is it for?
The GM TH400.

