RDX Diffs

[John Lindsay]

When I ran the RDX for the first time it was great, but as I race on wood there is a lot of dust going about, and it would appear that the vast majority of it is heading in the direction of my diffs, making them very very gritty, to the point where the diff does not work and almost becomes a solid axle.

I have the Ceramic diff balls in my Assassin and found that using them greatly improved the diff action and also have a set ready to go into my RDX but haven't got round to it yet, but the diffs on the RDX are far more exposed, hence they fill up with dirt more easily making me wonder if the ceramic balls will make a lot of difference. Just wondering if anyone else has noticed this? And is there any way of protecting them like it is on the Assassin where the diffs are enclosed?


John

[mark Fuller]

Ran mine at DMS sunday and my diff was slowly locking up aswell but rebuilt it and is ok now john can you let me know if the ceramic balls are better

thanks Mark Fuller

[MikeS]

Hi John and Mark,
It is not dirt getting into the diff, it appears to be the alloy drive-plate with the steel diff balls, the balls are wearing into the drive plate and binding. If you run with ceramic balls this does not appear to happen......

The solution is being addressed by the factory as I type and a replacement diff drive plate, in Delrin, will be ready next week. This will be supplied free of charge to all existing RDX owners and all RDX kits will be supplied with the Delrin diff drive plate in future.

All the factory drivers appear to have been running delrin plates with steel and ceramic balls, or the alloy one with ceramic balls, without any problems........as soon as we receive the replacement Delrin ones they will be sent out to you.

[axpayne]

Hi Mike,

All very interesting. I am not an expert on materails, but I assume the drive plates (diff rings) were made of steal and not an alloy. Won't the steal balls also damage the delrin?

Andrew

[MikeS]

Hi Andrew,
Sorry my description wasn't clear, I should have written "Diff Pulley-ring", it is the machined alloy plate that the diff balls fit into and the belt pulley fits onto, part number #79172.

Apologies for any confusion..............

[Alex Lindsay]

Hi Mike

It great to know you have someone you can call and get some great answers and action to the problems we races come across.

Thanks for all your help. :)