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I just purchased a 1960 PD4104 GM bus (Formerly an old Greyhound) She is in great mechanical shape, and when I double clutch on the upside, she works beautifully. The problem is in the downshifting. I can't figure out how to line up the gears to downshift. (4th to 3rd only grinds, and if I can slow down to 20mph, then I can get it into 2nd) Does anyone know the secret?
Ahhh, I remember learning those gears on my 4104 a few years back. here's the secret, and if followed, it will work every time. begin your downshift at the maximum speed for the lower gear. put more simply, if you hit the governor in 3rd gear at 50 mph, then when you are in 4th gear, and getting close to 50 mph (say 52-55), then do this...clutch-neutral-clutch out-floor it to rev to the governor-clutch-slide it right into 3rd with no grinding at all.
My air valve is leaking that goes to my breakes. Wondered if you had any suggestions and would you give my your phone# so I could give you a call? Thank you, Steve Bergin