Tractor Model # 917.2511522

Hydro Gear Transaxle Model # 218-3010

Hydro Gear pump Model # BU-10L-122

Quick History: Tractor ran fine before it lost motion, did a bunch of forum reading and found the problem to be the brake shaft. I replaced the shaft and put everything back together the same way, filled with oil (Castrol 20/50) and purged the system. Now forward motion is slow (kind of ok on flat pavement) and almost comes to a stop on the slightest incline on grass, reverse motion appear normal. I notice that there is resistance pushing with free wheel on push position. Done lots of reading but can�t find normal reverse poor forward problem.

Help will be appreciated.