ok... I am getting tired of my differential cups breaking, and I have heard some mention of a diff cup mod. I would like to know what it is and how to do it, because having to wait for a week for new cups to come is getting annoying. thanks.

Find some 10mm compression fittings in the plumbing section of your hardware store, sand the inside of the fitting, and glue it to the dif cup.

Or you can try the magnum dif cups they are suppose to be stronger

I have my modded and they havent broke yet, and I even hit a fence post with my truck, and the only thing on the front that lasted was the cups

Tiny

Im having a hard time imagining what pressure fittings are. Could you post a picture of the mod on here? (I know im a noob)

http://www.rcuniverse.com/forum/m_38...p%2Cmod/tm.htm

Try that thread

Compression fittings are in the plumbing section of your local hardware store. Go to any Ace Hardware, Home Depot, Lowes, etc... and ask for them. In the states, you will have to use 3/8 fittings. Like Tinybaum said, just sand the inside out until it will slip onto the diff cup. Then super glue them into place. I think the linky above has all the details.