GM TH350/C TH250/C 1969-79 Complete Washer Kit This washer kit includes all the washers in your TH350 or TH250 Transmission. You should replace your washers if they look worn or have any scoring. Caution: Not all TH350 used washers some were bearing style usually from 1979-ON were the bearing style. If your TH350 is later than 1979 and uses bearings please see our store we do have bearing kits available for these transmissions.