Friend bought this sled knowing reverse didn't work. I replaced the pins and spring retainer on the main gear cause they where junk, than I noticed the washer was on the wrong side of the upper reverse gear, fixed that, all the gears look good. Still just grinding in reverse. I adjusted the linkage to pull the gear out as much as I can still won't engage. Won't be able to work on it again till next week but any ideas would help as I have run out.