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Ring and Pinion Identification

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Ring and Pinion Identification #1
rod-h Rodney Hamilton Lago Vista, TX, USA Sign in to contact 1959 Austin-Healey Bugeye Sprite 1964 Triumph TR4	Topic Creator (OP) Apr 22, 2024 04:47 PM Top Contributor Joined 12 years ago 15 Posts

Hello Folks:

I am bouncing over from the Triumph Forums to see if you can help Identify a Ring and Pinion for me.

I purchased this a year ago as a Triumph TR4 part, but just set it aside becuase I didn't need it at the time.

When did get around to opening it up I noticed it was MOWOG Part number, obviously not a Ttiumph part. The P/N Is: Mowog -ATC7375-10/48

Can you good folks help me identify what vehicle this goes to?

Thank you so much.

Rod

Edited 1 time(s). Last edit at 2024-04-22 04:48 PM by rod-h.

Ring Gear Part Number.jpg 30.8 KB

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Re: Ring and Pinion Identification #2
ghnl Eric Russell Mebane, NC, USA Sign in to contact 1961 MG MGA "Calvin"	Apr 22, 2024 05:16 PM Top Contributor Joined 12 years ago 12,853 Posts

My guess is the 10/48 refers to the gear ratio. There is a (rare?) MG differential ratio of 4.88:1. I don't know if that's what you have however. Could it be from a Spridget?

The most common MGA ratio is 10/43 (4.3:1), the most common MGB ratio is 11/43 (3.9:1).

More info here: https://www.mgaguru.com/mgtech/rearaxle/ra201.htm

Eric Russell ~ Mebane, NC
1961 MGA #61, 1981 Alfa Romeo GTV6, 1984 Alfa Romeo Spider, 1991 Honda ST1100

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Re: Ring and Pinion Identification #3
cschaefer Chuck Schaefer West Chicago, IL, USA Sign in to contact 1969 MG MGB GT	Apr 22, 2024 05:53 PM Top Contributor Joined 15 years ago 2,901 Posts

Tying in the atc7375 number I get one for sale on eBay. the seller says:

Quote: Info on this particular part has been extremely hard to come by but based on our research we can say that is is probably meant for the larger "C" cars under the BMC umbrella such as Wosley, Riley, Austin Westminster and Austin Healey. It may also be meant for something like a Gypsy van.

I cannot vouge for the accuracy. The matching pinion is ATC7376. It is definitely a 4.8 ratio set. You can verify that by counting the teeth.

Edited 1 time(s). Last edit at 2024-04-22 05:54 PM by cschaefer.

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Re: Ring and Pinion Identification #4
cschaefer Chuck Schaefer West Chicago, IL, USA Sign in to contact 1969 MG MGB GT	Apr 22, 2024 05:53 PM Top Contributor Joined 15 years ago 2,901 Posts

edit: Oops! I duplicated my post.

Edited 1 time(s). Last edit at 2024-04-22 05:55 PM by cschaefer.

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Re: Ring and Pinion Identification #5
MGCGTV874on Peter B - ARB Gloucester, Glos, UK Sign in to contact	Apr 23, 2024 01:15 PM Top Contributor Joined 11 years ago 601 Posts

ATC7374 ring & pinion set contains ATC7375 & ATC7376, it fits the Leyland C series 5 stud axle as found fitted to the Leyland Sherpa Van
Earlier vehicles which use a similar axle were big Austin Healey, Austin Westminster & Wolseley 6/110

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