I agree need to check the linkage and endpoints to make sure the servo is not binding or being overstressed. I am planning on getting a better steering servo when I get mine too. The operation manual also has detailed instructions on how to convert the diffs to use silcone oil instead of the grease. Looks like the only change is to clean the grease out and instead fill with the desired oil. The seals are already in place.
Hot Bodies VE8 w/ RX8-1900 combo
Losi XXX-SCT CRC conversion MMP/hacker 13.5
Durango DESC410V2 Pro