Late model Output shaft, Item number 13 on the exploded view. Bert Transmission 13 Output Shaft, Late Model. Bert Racing Transmission Replacement Output Shaft. 36 SPLINE OUTPUT 1.166 OD X 7-1/4. 604 END ID X 14 INCH DEEP. 1.139 DIA FROM 7-3/8 TO 11-1/2 INCH 1.181 BEARING DIA. 11-1/2 TO 12-1/8 18 SPLINE 1.580 OD X 2.934 LG. 750 DIA BEARING PILOT FROM 15-1/16 TO 16-3/4 END. Related Items / Suggested Parts. Bert Transmission 93 Full Rebuild Kit. Bert Transmission 3 Tail Housing, Late Model. Speedway Motors is America's Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 73 years.