What I found for myself is lower rpm / speeds and e-brake on is to down shift the tranny to get the rpm up and then it works very nicely. Very important to have rpms up, the closer the rpms drops to 1200, less effective it becomes. At higher speeds and rpm, I am like Jamespi, truck slows down nicely and have to apply gas pedal to either stay at that speed or speed up.

To do be afraid to get the rpms up, the engines likes it and keeps everything working as it should.

__________________