AutomaticTransmission Rear Seal - Compatiblewith1970 - 1971BuickGS4557....Automatic Transmission Rear Seal - Compatible with 1970 - 1971 Buick GS 455 7.5L V8 Note: With Long Extension; More Than 133 WB; Without Boot; Outer Diameter: 2.5 ; Only Fits THM400 Compatible With or Fits: - 1970 - 1971 Buick GS 455 7.5L V8 Fits...more