Originally Posted by RB FIVE
Plus the diff's get dirty.
let this get in the way of buying a Tamiya 501X! There are adhesive diff covers from JAAD Racing and Tamiya that keep the diffs VERY clean and long lasting. The car is very reliable as everyone else is saying also.
There is not a bad 4WD out there IMO. Some just have better parts support than others and why you typically see more Associated B44s, Kyosho ZX-5s and Losi XXX-4s than Yokomo MR-4BXs, Tamiya 501Xs, new Schumacher Cat SXs, etc.