Front axel shaft seal - leaking due to incorrect sizing?

Has anyone who has recently fitted new axel shaft seals to their front diffs experienced continual issues with them leaking?

A number of us in Australia are finding this issue and we believe that the cause may be that the new seals are being produced slightly smaller (35mm vs 36mm ID):



The result is that the main body of the seals seems to grip on the shaft and eventually tear itself apart:








We have measured the genuine Land Rover, AllMakes4x4, Britpart (who are supposebly the OEM supplier for this part), Corteco (who seem to be the actual OEM supplier) and Bearmach and found all to be 35mm ID of the seal body.

However, some members with old seals have measured them to be 36mm (1mm larger).

The shafts measure 34.98mm which are the cause of why the seals are gripping and failing.

Wondering if there are any seal options available in the UK that may be the correct size? Apparently there is an NAK brand with possible part number of SG9AYW2 (but Google turns up nothing and NAK Australia don't recognise it) which may be the correct size but so far we have been unable to source it.

recently replaced my seals after doing my suspension ball joints. they were`nt leaking, but i thought it best practise to change them. they are now leaking. thought maybe because either britpart seals or incorrect fitting by me. on holiday at the moment, but will check sizes when i get round to replacing again.

You may be interested in reading:

D2BC.co.uk • Login

Ashcroft HD CV shafts and front diff seals - leaking? - Page 5 - Australian Land Rover Owners

Front axel shaft seal - leaking due to incorrect sizing? - Page 2 - Land Rover Forums - Land Rover Enthusiast Forum

And another one - D2BC.co.uk • Login

Seeing a pattern forming?

Note that the effected users are from all various parts of the world too.