Originally Posted by pucho
Are those Pro4 outdrives in the front? I spoke with Hara at the nats he told me they would work but in the rear only, wich was strange to me because it should be tha same front and rear. He also told me that the Pro4 spool would work but with lots of shimming and Pro4 axels. What have you guys foun out reguarding this?
Yes, pro4 outdrives. It requires over 3mm of shims on both sides of the diff and pro4 universals. It works almost same way with the pro4 spool (a small difference in shimming to center the spool).
Our source for HPI/HB parts does not have the diff outdrives yet, so I made due with what I had. As a bonus, I can run the steel japan-style universals from the pro4.
I never had trouble with wear on my aluminum pro4 spool, rc-zombies...I just kept the driveshaft pins greased (every 3-4 runs) with some of our MP black grease. Plus, it is very cheap, only 13-14 dollars.