From what I gather the 3905 diffs are the same as the ones in a revo so maybe u can find some revo upgrades to use? I have an e-revo and am still running stock diffs but am currently twisting the output shafts on the tranny, two so far both going to the rear. First one was what came in the Gmaxx tranny I bought and I ordered a hardened alum. one and snapped that in about 2 minutes! Thought the first was steel but it had been replaced w/ the aluminum already. Ordered a steel one and gonna give that a try, if I still have problems I'm gonna go to the plastic center shafts (with some creativity and mixing of 3905 and revo parts) I'm sure I'll get this problem solved! BL has massive amountsw of power and will break parts that nitro won't bother!!!LOL
Duster_360: Yes, I shimmed the stock diffs when I opened them. The teeth have better contact now.
lincpimp: CVD's for two reasons mainly, durability and space for the OFNA 9.5 shocks.
E-Revonut: I've studied the exploded views and there are some minor differences in the diffs, but it shouldn't be impossible to use Revo stuff in a creative way...