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Rear axle identification

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dave the rave

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Re: Rear axle identification

Post243110UTC WedUTC2018-07-25T10:41:15+00:00 2018...17.52

As far as i know, there's no numbers on the axle casing. I don't think there's numbers on any of the axle casings for the A30/35/40, Midgets/Sprites, Morris Minors & Riley 1.5/Wolseley 1500. These all use an interchangeable differential unit, just with different ratios. What is certain is that the A40 axle is specific to the A40. It's the width that defines it.
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Paul m

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Re: Rear axle identification

Post243103UTC WedUTC2018-08-01T15:07:07+00:00 2018...17.52

You might need to take care when changing the diff as I just changed 4.5 to 4.2 only to find out that the one I took out had the oil filler plug on diff casing and the new one did not so all change back again. On checking my other cars I see that some axle casings have the filler on the axle casing and some have it on the diff casing so I need to sort a 4.2 diff with the oil filler on the diff casing as I would rather not change the axle
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dave the rave

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Re: Rear axle identification

Post243108UTC WedUTC2018-08-01T20:14:25+00:00 2018...17.52

Ah, yes Paul. I forgot about that. Mainly because I've never encountered the problem. I'd simply weld in a filler plug on the back of the axle casing if needs be.
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Paul m

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Re: Rear axle identification

Post243102UTC ThuUTC2018-08-02T14:45:02+00:00 2018...17.52

I have noted that some people say they have had half shaft issue but on at least some of these I have noticed that it is after doing work on the axle, this might mean they that taken both half shafts out and then they have swapped them over in error.
This would mean that the half shaft is now being turned (twisted) the in a different direction it could be this that is causing the half shafts to fail
I have started to mark my half shafts driver side (D) passenger side (P) to ensure I know which side it came out of
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dave the rave

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Re: Rear axle identification

Post243105UTC ThuUTC2018-08-02T17:58:15+00:00 2018...17.52

Good point Paul.
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Graham Bish

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Re: Rear axle identification

Post243109UTC FriUTC2018-08-03T09:43:51+00:00 2018...17.52

Paul as dave said you are right on this one.

I recently got new wire wheel hubs pressed onto my Sprite halfshafts. I put duck tape labels on them identifying L & R to make sure they pressed the correct hub on each, even though the hubs are handed. They could have pressed the hubs off first and then been unable to identify each side. The engineer who did them, said this was good practice and indeed placing them back in the wrong side effectively "Unwinds the natural torque twist on the splines" leading to possible failure.

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