You could check if the RB-5 diff or maybe even just the outdrives (UM-515) are a direct fit. At least the bearing size is the same.
hiya guys,
I am a rb5 fanboy and I was prepared to do the big switcharoo this year (season) cos I've been running a rb5 since rb5 first popped the mold.
It's unfortunate that all the best ideas (durango dex210, tlr 22, yoke bmax2, schumy cougar sv... etc) are all hampered by durability problems.
And the bread and butter 2wd out there (rb5, trf201, b4.1 etc) are just plodding on without a complaint.
My take is, if you're buying a bells and whistles 2wd with price to match... and still have to jerry rig parts from other makes to make it work, You really might as well purchase one of those kits that already work well.
sorry for those who already bought bmax2s... It was also my intention to get a bmax2, but this is absolutely unacceptable. I'm prolly gonna get the rb5 again (yawn).
so much for trying out a new chassis... this requires immediate attention, Yokomo!
-Alexander