cracked diff housing
Turbo Mini Forums

So made a start stripping my gearbox and found this not too healthy looking diff housing.
Being that this is my first strip down I was hoping on some opinions, advice and knowledge from you guys.
Is this repairable or am I looking at a new housing?
Cheers

BHP sells engines, but Torque wins races!

Best option would be to pick up a new housing.

In fact i think they are matched to the box?

Edited by jonny f on 7th Feb, 2014.

Are you sure it's a crack? Not a casting mark. If it is crack you will need both gearbox case and diff housing as they are matched.

Class C 3rd Place Avon 2011 14.18 @101mph

It's defiantly raised enough to be a crack.
Doesn't look or feel like a casting mark

BHP sells engines, but Torque wins races!

I also think it looks like a casting mark. Anyway easy way to tell, dress it back with a belt sander or similar and see whats 0.5mm or so down.

3rd-ed on the casting mark.

If something is worth doing, it's worth doing half of.

I am going to vote casting marks

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

Well this is making me feel much better about the whole thing. Cheers guys.

BHP sells engines, but Torque wins races!

Give it a good rub down, with some scotch bright and see what you think.

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

They all look a bit like this.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

I've just looked at one, it doesn't have any casting marks like that on it.

Sand it and see.

I also suggest it is a casting mark.

Remove all doubt...... http://www.demon-tweeks.co.uk/Product.do?m...CFYWWtAodMhEANQ

test it with some dye pen if your really unsure

how about giving it a tap using something hard if it goes clunk and sounds ugly rather than a normal ding sound perhaps its cracked? if you know what im on about?

looks like casting marks compared to the other marks inside the thing

Another vote for casting marks.

But to be sure, sand it flat and Dye pen test it.

If you had to replace it, as already said, they are matched to the gearbox, so you have to be very lucky to get a secondhand one that either gives you round holes for the bearings or flat faces for the side plates to bolt to. I tried when one was destroyed by a diff pin failure and although the holes were reasonably round, the flat faces have a 10thou step at the join so will need milling flat as one piece to be able to use it.

Schrödinger's cat - so which one am I ???

After having a closer look the marks appear to be raised (casting marks).
I feel a tad foolish but hey ho, always best to check.

BHP sells engines, but Torque wins races!