This is a new AC Delco replacement case vent for heavy duty GM automatic transmissions.
| THM400 | 1965 - 1992 |
| TH200 | 1982 - 1987 |
| THM200-4R | 1981 - 1990 |
| 4L80-E | 1991 - 2009 |
| THM700-R4 | 1987 - 1992 |
| TH200/M16 | 1980 - 1980 |
| THM200/M29 | 1978 - 1982 |
| THM200C/MV9 | 1978 - 1987 |
| 4L80-E-HD/MN8 | 2002 - 2002 |
| THM-R2/MT1 | 1991 - 1991 |
| THM700-R4/4L60/MD8 | 1982 - 1993 |
| 4L85-E | 2002 - 2009 |
| 3L80 | 1992 - 1993 |
