You don't change the layshaft anyway for changing gearing I think, that's done outside the gearbox..

The layshaft and idler internally are not changed to alter ratio, this is done by changing the 2 gears external to the box ( see manual for reference). There is no reason why the internal part of the layshaft can't be 1 piece IMO.

I'm going to glue the pins.
Like this I'm sure they don't come out and anymore!

I had this happening last weekend and the day was finished for me.

Exactly, I'm with you on this. I think schuey need to look at this design judging by the amount of people experiencing this problem. Come on Schuey give us a factory designed and tested fix!

cat sx has run this kind of idea for years without problems guys??

not in a 'sealed' gearbox though. and the fact that it has been used on the SX doesn't make it acceptable in this instance

I just pulled my gearbox apart and my pins had moved a little, an o-ring was slightly raised, and it had been rubbing very slightly.

I've chosen to threadlock the pins in.

Wise choice I think, what's the worst that can happen, I can't see a reason for needing to remove the layshaft gear anyway.

I guess my suggestion is not worth as much to the uk drivers as it was directly to the engineer @ Schumacher...

Phil did mention it today when I spoke to him...

I havn't had any issues yet but ive only used the car for one race meeting .. Yesterday i dropped in on a automotive shop and grabbed a couple of these 7/16" snap rings and will be installing them very soon prior to my next meeting.

Cheers for the tip Raul..

Good idea but I personally don't want to add another metal bit that could potentially cause damage in a sealed gearbox although it is very unlikely.

Smart man...

Need to look into this too, but I'm in the UK.

Is this the sort of thing?

http://simplybearings.co.uk/shop/pro...ducts_id=21863

This is what it looks like it's 7/16".

If you need them I can get them, we use all American size stuff at work for our US built machines. Let me know if you need them and I can find out who our supplier is.

although i wouldn't fit one myself, if you want to try it, here is a link :-

http://www.modelfixings.co.uk/circlips.htm

you can get plenty of internal circlip spares while you're at it for rebuilding the diffs with their (un)user-friendly design of thrust race retention (and yes, i know the design was used in the CAT SX plus i remember them in my Axis TC from years ago - they were crap then too)

Not had a problem with my SX or SV..

this happened to a couple of cars at the regional at Broxtowe on Sunday, one bloke blew up his gearbox, changed everything for the next round, and blew it up again. Both times it was the o-ring that gave way and the pin destroyed the box. He sold his car there and then for £175!!!!!

This is a easy and quick fix. And its PERMANENT. you will never need to replace them.