Diff Issues

[Welshy40]

Guys,

Has anyone had any issues with the rear diff?

I feel that the diff screw is way to thin and have done a rebuild using Kyosho diff parts (I have loads of spares still).

This now utilises a much thicker screw and different bigger thrust ball races and plates. Also a better nut that hides the screw end totally.

The only thing I didnt change was the spring, which I think may be the real problem with the diff, as its not strong enough to give a totally slip free diff as it could snap the original thin screw, hence why there is still slip.

I will test and update what I have done. Let us all know what issues you have had and what was done. Cheers.

[mole2k]

I've always thought the diff screw and nut was far to small. I've stripped the threads of one screw already and I know other people at the club have had issues with the small nut.

[DCM]

There is nothing wrong with the diff screw, nut or spring, but if the diff keeps backing off, you either got them in wrong way round or the nut and screw needs replacing (they sell them in packs you know). Only thing you have to watch, is which way up the thrust washer goes, as one side is rounded and the other is square, the rounded side goes facing the screw head.

I have run this type of diff for 2 1/2 years no problems.

[Garry Driffill]

When my dad had a Tamiya 501X he had issues with the rear diff screw and nut.

[DCM]

the temptation is to over tighten it, which isn't needed, I got 4 DB-01's and the same amount of TA05's and never had an issue....

[Welshy40]

Well compared to all the other cars out there the screw is almost half as thin.

Some tracks need a tight diff and the standard design doesnt give you much of an option, hence why I done the rebuild and replaced these weak items, giving me all the options if I require them. Its simple and no diff rebuilds.

I will see if any slacking happens, and if so will come up with a solution (I already have an idea) if needed.

[RcRob]

Originally Posted by Welshy40

The only thing I didnt change was the spring, which I think may be the real problem with the diff, as its not strong enough to give a totally slip free diff

Yet you say:

Originally Posted by Welshy40

If the kyosho spring is softer then Tamiya's one is the way to go.

Could Craig Harris vouch that:


Cos Hulk says: