AT545 acting jerky, weird shifting
Hi guys, looking for help again!
2000 3800 international, 8 row bus, DT466e, attached to a AT545. 137K on engine, just recently serviced by a shop after I bought it from a school. Bus sat for one year before I bought it. Only driven it about ten miles so far.
The bus shifts somewhat hard into gear, going up and down, but feels very jerky, like she is never happy in one gear or another. As soon as I let of the gas, she downshifts, lurching me forward, and probably scaring the willies out of any driver behind.Nothing is remotely smooth about driving her and, with the air seat, its making me kind of sea sick.
Since the bus is new to me, I am still trying to work out if the jerky up and down shifting is me getting used to driving this type of vehicle, OR, if there is an issue with the transmission.
Don’t know what rpms I am shifting at, since I have my eyes glues to the road to make sure I don’t hit anything (still getting a feel for driving her).
Don’t think it is gear slip, but I don’t know if I would recognize gear slip anyway.
A few possible issues I see pop up when researching what could cause the effect I am feeling are (1) stuck governor, (2) modulator and modulator wires to the AT545, and (3) valve body issue.
Any thoughts on this one would be greatly appreciated!!