I will say that I had gear stripping issues with my 14 car. Slipper was run pretty loose and I replaced both front and rear bulkheads as well as the gears. Front I believe still did it. Fast forward to my 15 car and I've not had one issue. Built the car from scratch and have a full outdoor season and change and no issues with gears at all. Car still runs great. Not sure what the issue with my 14 was but I sold the car after I rebuilt them the last time. Very happy with the 15 car.