SD SSG Diffs

[Gareth Jones]

All,

Does anyone have a good solution to my constant snapping of rear diff bolts? I cannot seem to make them last, they start to slip then snap the screw shortly after.

Any help appreciated.

Gareth

[sosidge]

Originally Posted by Gazmidas

All,

Does anyone have a good solution to my constant snapping of rear diff bolts? I cannot seem to make them last, they start to slip then snap the screw shortly after.

Any help appreciated.

Gareth

I've run Yokomo diffs for YEARS in various cars and only ever broken one bolt... the secret is in how you build them.

Use the screws with a shank, not the ones that are completely threaded.

LOADS of black grease around the thrust bearing assembly and the screw head and shank.

Be careful not to overtighten the diff as the screw will not like it. There is a limit to how tight the Yokomo diff will go with the relatively soft plastic diff halves, if you try and go beyond that limit all you are doing is putting extra strain on the parts. If the diff starts to feel notchy, it is too tight.

If the diff is constantly backing off - buy a new bolt and nut.

[Swalls]

As sosidge said, if the diff is coming loose then it'll be because the nyloc nut is worn out, you need a new one.

As for the screw snapping I have never had that issue and I used to run this car a lot and still run a BD which has exactly the same diffs except for a different pulley obviously. I can only assume it is linked to over-tightening because you are worried the diff will come loose.

Either way, the first step is to replace the nut and see how it goes from there. Fixing any problem is an iterative thing, change one part at a time until you find the solution.

Hope that helps you. Let us know how you get on with a new nut.

[Gareth Jones]

Thank for the quick answers.

I shall have a look again and see what I can sort out.

What suppliers do you lot use for Yokomo bits??

Also does anyone have a recommendation for one of these variable timing speedo's? I have practised at Arden raceway but got fed up of being passed on the straight, i was using a 10.5 vs a 13.5 which appeared twice as quick!

Gareth

[sosidge]

Yokomo bits are becoming a bit of an issue in the UK, not many places are keeping the stocks that they used to. Fortunately the SD came from a period when Yokomo was well supported for parts here, so there is a bit about.

Demon is about the best on-road internet supplier in the UK now. I see bits on eBay from time to time. You can also order from the various suppliers in HK or even Japan although postage can be a bit much if you just need a diff screw.

Personally, since I am running a TOP car that uses Yokomo diffs, I get parts through my sponsor who sells direct now at www.rcracinguk.com.

As far as the timing speedos go, there are a lot on the market that can have the software updated. I would only buy one that can be updated via USB. That being said, I thought Ardent were running 13.5 untimed as one of their classes. The speedo nonsense is doing a lot of damage to on-road right now, you are not the first person I have heard from who is put off by the massive speed difference. Personally I don't run the timing software which is fine on the smaller club tracks (probably faster due to the smoother powerband) but might be a problem at the big ones (where you get caught very quickly at the end of the straights - the time loss is not so great, but the risk of shunts is high).

[Gareth Jones]

Can any confirm if B-Max diffs are the same as the SSG?

Just thinking it will be easier to get the parts for the B-Max and possibly purchase a complete diff or two.

Gareth

[Swalls]

Apart from the outdrives yes, I think they are the same.