[snakebittexan]

I posted a thread seeking advice for my 3550 which at the time would only shift into 1, 3rd and 5th. It turns out a change of fluid and adjusting the rear throw restrictor bolt (hense the "duh") gave me an early Christmas present, a working transmission! I changed the fluid first which did not fix the problem because the issue was the bolt which had backed out restricting the shifter travel.