Have an odd issue, bolted in a 13.5 motor when I try to put on the 25 tooth pinion there's no room for motor adjustment and the mesh is tight? Odd thing is the manual on the build page shows a 78 tooth spur but the gearing chart in the back says 81 spur? I've tried rotating the motor to see if the screws in the can would have a difference and it does not. Anybody else run into this issue?? WHATS really weird is the T6.1 and 6.2 gearing chart is Completely different for the same transmission 2.60:1?? the t6.2 says 81/23 for 13.5, t6.4 say 81/25??