[Shark413]

Well as soon as I got home from work I took the truggy and removed the rear motor brace. I placed blocks under the front and rear ends and applied a few pounds of pressure to the center diff. WOW, there was about 1.5mm of up and down deflection at the motor (the end of the motor can moved 1.5mm from level when the chassis flexed). This was just from about 5 lbs of pressure. So with the rear brace installed this deflection would have been transfered to the motor/shaft/bearings/gears. So I think I will just add another attachment point to the end of the motor mount to eliminate the side-to-side flex. Thanks Mike for taking the time and letting me know about this issue.