Originally Posted by glassdoctor
Well... open gears are typical on 4wd cars. The front and rear diffs are normally sealed pretty well but the main gears are not covered.
Maybe a simple lexan shiled/deflector would help... or if you can do a full enclosure that would be even better.
Most cars like this are made for racing on dirt and it's not a problem. You must be running where there are a lot of small rocks or sand?
Firstly thanks for the reply glassdoctor.
I am gobsmacked that open gears are typical on 4wd cars!!!
I am running my car on a proper RC car track. Meaken park at Slacks Creek, Brisbane, QLD, Australia. By the way, I absolutely envy the tracks over there in the USA!
The front and rear diffs are sweet and enclosed in a housing. The open gears have a very fine tooth size(0.5 module or 50.8 DP), so I think this doesn't help it.
After killing the first set of gears, I ordered and replaced them, only to get into my 4th lap at the track and find the new gears are now also cactus!
I had a look at some of the other 4wd cars and the gear teeth are a lot bigger.
So anyway, I am going to fix this problem by making a full enclosure. I am half finished and so far its coming up sweet. Making it out of 2 and 3mm ally. Being a fitter and machinist and having access to a complete machine shop, makes this a very possible solution.
Thanks again for your replies.