Morris Minor Owners Club

Does the 4.55 diff always have a filler plug on the side of the diff housing?

And is it correct that the 4.3 axle always has the filler plug on the axle case at the rear?

I realise that there are some hybrids out there with either two or no plugs.

Otherwise will I need to count the teeth?

I think yes to the first two - but the late S11 5.3 diff also had the filler plug on the side of the diff housing, so teeth count is probably wise.

Rog

The ratio's usually engraved on the side of the crown wheel - might need a magnifying glass to read it though

much easier to count teeth to avoid any confusion. There are also 3.9 and 3.7 versions out there.

I'd have thought that just reading it was easier... Never mind

how many teeth should there be?

I guess you just devide one by the other and see if to comes to 4.55

Yup - I'll have a look in a minute

Have just found this - I knew I had seen it somewhere.

http://www.morrisminoroc.co.uk/technicaltips/diffs.html

Rog

Phew - I forgot to check. Too busy pulling an A post and door off a pick-up

when I cleaned it it was marked 9/41 on the casting! 4.555 it is then.

As you may have seen elsewhere, it was a false alarm nothing wrong inside the diff must have been someones old teeth that fell out!!!