This problem may be more than typing can solve. First off , history and what was done to what. Sometimes just flipping a part on the reinstall will cause a non drive situation. Are the wheel hubs locked to the axle?

I went back and inspected pump still could not find anything wrong , I reassembled and purged again, the wheel that I did not bother works find, but the wheel that been apart works find but will not go fast or change with more throttle being applied, just constantly turns slow in forward and reverse

Does it have 2 transaxles, 2 pumps, 1 drive belt? Does it act normal when lifted to free spin but not with weight on the tire? Who makes the transaxle and which model number is it?

Yes it has 2 pumps and motors and 1 belt, I have been trying with wheels off unit, and Hydro gear makes it model no.

PW-1KQQ-EY1X-XXXX

What is the result of no load? Obviously this is a pneumatic question.