Just finished reassembling my 884 after far too much time. I installed a new engine clutch. I removed the torque amplifier (pump and all,) and installed an eliminator coupling. Installed a new park brake. Also rebuilt the PTO clutch while I was in there. Put everything back together and everything seems to work fine EXCEPT for one thing. When driving up grade and disengaging the clutch there is a normal stop but no rolling back, none at all. Same in all ranges and speed gears. Very similar to one of the larger row-crop tractors with an out-of-adjustment TA. Any suggestions what I have done wrong. TIA!!