New to this Mack Granite with T310 mlr Transmission. The truck doesn't have a shift pattern diagram in the cab, but after looking it up apparently it has lo/lo, lo, 1, 2 3, 4, 5, 6, 7, 8.
My question is at what rpm do I shift? Another driver told me around 20,000 rpm. Seems a bit much to me. Is that right?
Please help!