Pack Allison Transmissions 1.28.x

This mod adds various Allison Transmissions to all default trucks and certain mod trucks.

Available Transmissions:
Allison 4500 6-speed
Allison 4500 6-speed Retarder
Allison 4700 7-speed
Allison 4700 7-speed Retarder
Allison TC10 10-speed

Supported Mod Trucks:
RJL's Scania Trucks
ohaha's Volvo Trucks
Kenworth W900
Kenworth T680
Peterbilt 579
Peterbilt 389