help on bosscat diff

[robin_c]

Hi all - Well my bosscat rear diff died today.

It was the plastic diff outputs! The trilobe washer buried itself in them.

Does any one want to part with a alloy set for some dollar.

Alternatively if these are really hard to source if someone could supply a accurate drawing or lend me a set I will convert into 3D data and get some cnc machined at work.

[Peakey]

They do pop up from time to time but if you have the capability to make some then I may be able to help you out with a pair to work from.

[robin_c]

That would be great! As plan on rebuilding both bosscat ones and making another set for my procat build.

What about the A544 diff washer. are these used on any other cars or will they need turning up too?

The plastic ones i have remaining use a tri lobe washer which i am guessing is only used on sport diffs not the pro one.

[Peakey]

Yes the tri lobed washer is for the sport but what you want to use is the hex one like the one I use in my diffs


These are a lot more reliable that the ones in the pro diff. Let me have a sort out and I'll see how meny I have

[robin_c]

Ok sounds like a plan. Bosscat now in bits..Started the diffs clean up and ordering other bits for build, found some decent high torque short belts too.

hoping these outputs arent too complex in machining terms. will probably have a job lot done cost depending. Will get my china office on the case once detailed up in 3d/2d.

[DerbyDan]

Originally Posted by Peakey

Yes the tri lobed washer is for the sport but what you want to use is the hex one like the one I use in my diffs


These are a lot more reliable that the ones in the pro diff. Let me have a sort out and I'll see how meny I have

Justin; you would have to change over to an old style drum diff in order to use the hex-diff halves as they won't work just substituting them into a Pro-Diff. The comp-spec Pro Diff uses alloy outputs that have no key-ways at all - they rely on the friction between the two parts. I was lucky enough to abtain one of these diffs from CAT3K which along with a good condition Sport diff I was able to build one good part.



I've got say that this is one of the best buggy ball diffs I ever built - so smooth & free & at the same time, no slip... a complete revelation compared with the MMS/Schumacher Hex diff I had previously fitted. So far i've only done two race meetings with the car - one with an 8.5 & then the last week with a 6.5 brushless - but the diff held out fine & still feels smooth.... which is better than I could achieve with my old Atomic Carbon Losi CR2

[Peakey]

Hmmmm I'll have a look at the weekend as I've got pretty much everything I need to build up a new bosscat pro diff and I'll compare the two.