Hello. I have just recent acquired an Ariens 1742 & the left side wheel jerks bad forward & reverse. Sometimes it won't even go in reverse until I put the right side in reverse as well to get the mower rolling backwards & then the left will kick in, but it is very jerky. It feels like I am riding on a square wheel. Right side is fine. I checked the fluid level & it seems to be correct, about an inch or hair more from the top of the fill hole. Anyone had this problem? I do not want to replace the entire left transaxle if not needed. Thank you!