This is a high quality rubber replacement o-ring for the case connector in GM TH400, TH350, 700R4, TH125 and TH250 automatic transmissions.
| THM400 | 1965 - 1992 |
| THM350 | 1969 - 1985 |
| THM700-R4 | 1987 - 1992 |
| THM125/M34 | 1980 - 1982 |
| THM250C/M31 | 1980 - 1985 |
| THM350C | 1969 - 1986 |
| THM700-R4/4L60/MD8 | 1982 - 1993 |
| THM125C | 1982 - 2000 |
| 3L80 | 1992 - 1993 |
| 3T40 | 2001 - 2001 |
