i have a gt 5000 lawn tractor model number 917.276330. ive had this mower for a couple years and never really had a problem with it and want to avoid going to the mechanic .. im pretty mechanically inclined but have never worked on a tractor.. if you jack the front end up it steers all the way left and right. but when you let it down it only steers a quarter turn to the right for some reason .. could this be the drag link??