@RickSBC400
Dex6 if you drive it normally?
or
Any of the higher viscosity Allison approved TES-295/668 fluids if it gets punished heavy a lot.
https://www.allisontransmission.com/parts-service/approved-fluids
Dex6 if you drive it normally?
or
Any of the higher viscosity Allison approved TES-295/668 fluids if it gets punished heavy a lot.
https://www.allisontransmission.com/parts-service/approved-fluids