Patent ID: 8707692

Claim:
A drive device including a rotating pump cylinder block and a rotating motor cylinder block, the drive device comprising: a main housing having at least one of the cylinder blocks disposed therein; and a center section engaged to the main housing and having hydraulic porting formed therein for connecting the pump cylinder block and the motor cylinder block, the center section comprising: a first piece having a pump running surface connected to the hydraulic porting, wherein the pump cylinder block is rotatably disposed on the pump running surface; a second piece having a motor running surface connected to the hydraulic porting, wherein the motor cylinder block is rotatably disposed on the motor running surface; and a spacer disposed between the first piece and the second piece for hydraulically connecting the first piece and the second piece and for modifying the distance between the pump running surface and the motor running surface, whereby the first piece is physically separated from the second piece by the spacer.