Bought a 79 RS600 today. My first R Model, in fact; its my First Mack. I have driven R models a bit in the past and have always liked them. I have the E?300 in mine, its a 1983 Model engine and he 12 speed transmission. There are no tags or shift pattern stickers inside saying which tranny it is but im assuming its a 12. 5 main gears with a Direct and OD and R on the air knob and the "bull low" stick next to the seat. I can shift it alright but I think Im missing something,...im still grinding more then I think is normal. What is the proper protocol for shifting these things? When you upshift from direct to high, do you simply move the selector knob towards H as you get off the throttle? Do you clutch and get off the throttle? And downshifting, do you move the selector and throttle up to match revs or clutch and throttle? And upshifting the main gears, do you preselect D as you prepare to upshift to the next gear??? Any info would be great. Thanks
