Yale & Towne Trojan / Allison CRT-3331-2 & CRT-3531-1 Transmission Parts Manual Part No. TB036 April 1963 Edition This OEM Manual is the REAL DEAL and not a reprint. I recently purchased a huge lot of manuals from a DOT Repair Facility. This manual has been used in a repair shop and may have dirt, grease, fingerprints, writing, and smudging on some pages.