RE: help needed with diffs
First off,, stop using a water hose to clean your car, it will rust up everything metal
Second, what is all the redish on the ring gear?? hi-temp silcone gasket materail (RTV)?
If this was an RTR, clean all the grease out (all the grease) and rebuild the diffs with Diff oil
5k front 7k middle and 1k rear is a good basic set up