Originally Posted by ewood810

I just finished my first MT410 and put a Tekin T8 2050kv motor. On it pilot run the motor is extremely hot. Running a 16 tooth pinion and 3.8 Proline trencher tires. I didn't get a temp reading on the motor but I am afraid the motor is too small for such a large truck, any help would be appreciated.

Originally Posted by Micah78

Wouldn't you think that rocks would just get stuck between the diff/chassis and then ruin the aluminum diff cup? At least when that happens with the stock plastic cup it's dirt cheap to replace. Not to mention if you have a gear failure inside the diff cup it will be near impossible to wash/clean the metal flakes out of the aluminum diff cup before putting new gears in it. The reason I say this is because I've never been able to find a solvent that can clean silicone diff oil out of the cup. I've tried cleaning the silver diff oil out of a used diff cup and it was impossible. The only way I've found to have fresh clean oil for a diff rebuild is to replace the plastic cup. That could get expensive with the fancy aluminum cups.

Originally Posted by Steel_Rain

Eh. I think I'm running a T8 2200kv with an RX8 (G2) with a 16t and 3.8's (dBoots Backflips) with no problems. I'll double check the kv and pinion count when I get home today. I was checking temps on this setup last summer and I was in the 130-140d range.

What's "extremely hot" to you? Obviously, as we get towards the 160-180d mark, bad things can start to happen. Do you have a heatsink/fan?

Originally Posted by Micah78

I'm not saying the 7075 cup isn't tough. What I'm saying is that if a rock gets wedged in there it will still gouge the outside of the cup. I'm sure it would still be useable but it would look like crap! I still haven't found anything that will clean silicone oil either. A poster in this thread mentions " essence f ", but I have no idea what he's talking about. I've tried every solvent I know of. Brake cleaner, carb cleaner, ether (starter fluid), gasoline, you name it. I asked local racers at my LHS what the magic solvent would be to clean the silicone oil out of my diff cups and they told me they knew of nothing that worked. They told me when the gears fail to just replace the cup. I even started a thread on RCTECH years ago asking this question and got basically the same response.

Originally Posted by 0verkill

I drive on BMX and MX tracks which have very rocky terrain. This is the stock case.

And this is the aluminum Fioroni case.

Originally Posted by vettehigh

How do you think the new M2C Racing HD cases will hold up?

Originally Posted by ewood810

maybe I am showing my inexperience but wouldn't a dusty motors cover be a much cheaper way to keep the small rocks away from your diff cups? I get the aluminum ones look pretty, I just can wrap my head around the cost of them.