Identify this diff ratio?

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mollythemoggie
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Identify this diff ratio?

Postby mollythemoggie » Sat Feb 16, 2019 11:37 pm

Hi I was just wondering the best way to identify what ratio a diff is I have.. It has the numbers aya7010 stamped on the saddle things with 126 on one of them and 109 on the other

Thanks very much!
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irmscher
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Re: Identify this diff ratio?

Postby irmscher » Sat Feb 16, 2019 11:54 pm

Count the teeth on the crown wheel and pinion.
mollythemoggie
Minor Fan
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Re: Identify this diff ratio?

Postby mollythemoggie » Sun Feb 17, 2019 12:12 am

Thanks! Its a 4.2!
RobThomas
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Re: Identify this diff ratio?

Postby RobThomas » Sun Feb 17, 2019 9:07 am

Are you sure it is a Morris Diff? Looks like cast iron and the "AYA" code is unusual.
Cardiff, UK
philthehill
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Re: Identify this diff ratio?

Postby philthehill » Sun Feb 17, 2019 9:57 am

May be Morris but not a Minor one.

RobThomas
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Re: Identify this diff ratio?

Postby RobThomas » Sun Feb 17, 2019 10:29 am

ATA7034 on the main bearing caps, normally, isn't it?
Cardiff, UK
philthehill
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Re: Identify this diff ratio?

Postby philthehill » Sun Feb 17, 2019 12:06 pm

Diff details

Rob
Yes ATA7034 and alloy bearing caps.

https://www.ebay.co.uk/itm/MOWOG-REAR-D ... :rk:1:pf:0

Also note the position of the diff ratio 9/38 on the diff nose in the link above.
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RobThomas
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Re: Identify this diff ratio?

Postby RobThomas » Sun Feb 17, 2019 5:04 pm

Some AYA codes on the 1800 Landcrab, if that helps. I don't know much about RWD Austins of that period.
Cardiff, UK
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