Tailshaft Housing Rebuild Kit - 2 Seal Style - Bert Ball Spline Tailshaft Housings - Kit. Manufacturer: Bert Transmission. Notes: THIS REBUILD KIT IS FOR THE NEW STYLE BALL SPLINE TRANSMISSION WITH 2 SEALS ( 1 FRONT & 1 REAR ) IN THE BALL SPLINE ASSEMBLY.THIS CHANGE WAS MADE IN 2005.