I'm having issues rebuilding my 2wd slash transmission (gears ground up courtesy of someone else). I've got all the necessary parts that were destroyed (main diff gear, idler gear, and top drive gear). I took the transmission apart. No problems until I got to the top drive gear which is attached with a little pin to the shaft and I can't get it off. Not sure if there's a trick or tool I need. I could really use some help here before I break down and buy the proline prebuilt transmission, which is too costly after buying trenchers for the pede this morning. Any help is greatly appreciated.