Originally Posted by
stocker
Actually i wanted to use the 416 screw and nut for easy adjustment of the ball diff instead of having to remove the drive shaft. And the 416 nut is integrated into what is the plastic nut holder in the TB03 kit which looks stronger.
as far as I can tell, the cup size for the outdrives are 3mm apart. Theorectically, they should fit. I am basing this assessment with TA05 and TRF417 diff joint. Assuming Tamiya would prefer to only support 1 size fits all plastic shaft cushion for their drive shafts which is 3mm wide. The part number for the little plastic "nut" is #9804373. Unfortunately the screw is 22mm. I think you should be able to simply use the original screw.
Have a look at TRF416's manual
here.
Recently, advise that have been given to me is tight front (spool preferred) and very loose rear. I used gear diff, with 300,000 wt front, and 30,000 wt rear (they asked me to go down to <10,000 wt). I was racing 21.5T blinky, the car was built 2 weeks before race and it came 8/11 at my first ever states title... am quite happy with my own performance and the car... There are still room to improve as far as my car goes, but have to sack the driver he's too slow... hahaha