Originally Posted by wollow86
As you can see, there's a new hole a few mm forward of the motor mount root arm mounting hole. The car currently has a xi mount on an xi chassis. The hole further forward is for a zero mount on the xi chassis. So for an xi mount on a zero chassis, you need to make a new hole 3mm rearward of the stock hole. Does that make sense?
Yes it makes sense, you just want to be spot on the line when you drill the new hole though, a couple of mm out either way could end up twisting the lower deck?
Oh and an update on my problem. I'm not sure if this is a definitive answer or not as I need to test my theory out some more.
It could possibly be the gears that I'm using that are causing the noise.
I put a new spur & pinion gear in the car earlier today, and testing at a track tonight resulted in a quiet and silky smooth drive train.
Now here's my theory - The other gears I am trying to use have either had little or moderate use in a Tamiya TA05. As the TA05 has the motor in front of the spur gear and the pinion gear has to be reversed, ie grub screw side goes towards the outer end of the motor shaft, I'm believing that the way the gears wear in the ta05 cause the noise and binding feeling due the wear attributes on the teeth face are different between the 2 cars.
There may be still a slight problem with the motor mount as the gears are the most silent when only the bottom motor screw is tightened up, this is not ideal but could explain the binding feeling and added to that the different wear on the face other the teeth causing the noise.
Anyway it now seems like I am moving forward on nailing this problem so I'll do some more testing on the weekend and post updates on my findings.