AT540, AT542, AT543, AT545, AT1545 Automatic Transmission Main Shaft 1.060" Journal Serial #3210775437 & Up Reinforced (11226B / 29524363) | Compatible With Allison Units Automatic Transmission Main Shaft 1.060" Journal Serial #3210775437 & Up Reinforced (11226B / 29524363). Compatible with / Fits Allison Units 1970-2001 AT-540, AT-542, AT-543, AT-545, AT-1545
