Heres what its doing. Dang thing doesn't want to stay in 2-hi. I move the shift selector up there, and it will stay for a little while, but now, almost every time I accelerate, it'll work its way back down into 4-hi, creating a hellacious grinding noise. I thought it might be a bad linkage adjustment, but after playing with it for an hour, I finally removed the damned thing (linkage), and no go- it still does the same thing. 4-hi and 4-lo work perfect. If I put it back in 4-hi, which is where it seems to want to be, I don't get any more grinding. Any ideas on what could be causing this??