About This Item

Item Description:

Allison TT & TTB 2221-1  2421-1 Powershift Transmission Service Overhaul Manual

1971 Edition 

Revised 1979



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.