I took my MERV apart to clean it and do some needed maintenance. I took the transmission out, and took it apart, but didn't need to do anything to it. I put it back together and now there is a grinding noise coming from the area of the spur gear and slipper clutch. I have messed with the tenson of the slipper clutch, to no avail. The slipper clutch pad seems fine too. And please, do not say it is a differential. I have heard that before and this is not the same. This grinding noise is present even if I just push my care with no power. If anyone has any ideas on how to make this noise go away, I would appreciate it. I have searched on-line and noone seems to say anything about it.