XRAY - Model racing cars

Any tips on whats the fastest way to flush/clean your diff lube for testing different weights while you're on the track? Use carb spray? Contact cleaner or should i just scrub/flush with dishwasher soap?

I usually use wash Benzine to flush the diff case.. But You need to dismantle everything, don't let o-rings and bearings to be submerge in wash bezine..

this isn't really an answer to your question but the best way to do this is have an extra dif all set up. for me it's worth it cause being an old fart if I take an hour hour to change dif oil by the time I get back out on the track I can't remember what the DIFFerence was.LOL!

wal mart, in the auto section, they have a black can of brake-parts cleaner for like a dollar somthing... i tend to use alot of spray, so the ceap stuff is great.