2000 j/n F23 Transaxle. The endplay of the Final Drive Unit must be correct for proper performance and to prevent damage to the transmission. Tool J-44388 consists of 4 pieces, which are used to make the measurements for calculating the correct shim thickness. The final drive end play check is made by inserting the measuring disc J-44388 into the bearing race of the transmission case. The gauge J-44388 is placed across the case, and the clearance is measured to determine the necessary shim for proper operation.