Quote:
Originally Posted by sosidge
Anyone else having a few issues with the B-MAX4 transmission?
I'm a little disappointed to be honest. Seems like the tolerances on some of the plastic mouldings are way too tight, it puts pressure on the bearings and things don't spin freely.
On the centre transmission case, the lower half is fine, but add the top deck and top cap and it all tightens up. I've had to remove quite a lot of material from the inside of the top deck and from the top cap to get it to spin freely (probably a little too much in fact which is just as annoying).
On the front and rear gearbox cases, the standard shimming is way, way too tight, I can't imagine anyone getting away with it. Plus the diffs don't spin freely with a shim on each side, they jam up in the cases. I ran the car on Thursday night with the alternative setting in the manual, but it's still too tight, I've now taken a shim off the diffs to put it on the loosest setting, this is better but on the edge of being too loose.
It's almost as if the plastics used in the mouldings haven't shrunk as much as Yokomo intended and everything is a couple of tenths too big.
Anyone else found this or have I just been unlucky with my parts?
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Can only speak for the one I've built, but had no problems with it in that way. The centre went together fine (I think, I'll check it again now!), and the front/rear boxes were fine on the alternative looser manual setting. I have done 3 meetings on it so far.
When I ran the Aero I had issues with it always being too tight, I ended up running in on a bench for about 30 mins after every rebuild, have you tried a long run-in? Are you using grease in the gearboxes? Also, tip from the Aero, is your pinion gear on the shafts definitely fully on and flush? I had to remove flashing from where it sat on the pin in that car?
Dave