Intermittently unit will throw code 52 and move at a snails pace with a growl. If continuing to drive it it will jerk in and out of "gear" and work for bits of time. The next day it could work all day and then code out again. I know this code is related to the encoder bearing on the drive motor. This bearing has been replaced as well as all the wiring to the controller with no issues found. Any further thoughts? Thanks.