AV5 axle Ratio

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ian24ian
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Location: East Sussex

AV5 axle Ratio

Post by ian24ian »

I have in my collection of bits a rear axle from a 57 AV5 van, trying to ascertain what ratio SHOULD be in the axle, I have checked the internet and have come up with several different choices ranging from 4:7 thru to 5:3, I think it should be 5:1, without dropping the diff out it there any stampings, tag, or easy way to check?
Paulc
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Re: AV5 axle Ratio

Post by Paulc »

The 948cc vans had the same diff as the saloons, 4.55 but were on 5.60 tyres so the road speed was 14.72 mph/1000rpm. There is a stamping on the outside of the diff, normally under 60 years of crud, that should, for example on a 3.9 diff 10/39 (divide one into the other).
Big Daddy
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Re: AV5 axle Ratio

Post by Big Daddy »

Number of teeth on pinion and crownwheel is stamped on the case. Just divide larger by smaller number and you have the diff ratio (unless someone has changed the internals).

Alternatively physically check the number of pinion rotations for each revolution of the half-shafts.
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ian24ian
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Joined: Sun Jan 31, 2016 7:03 pm
Location: East Sussex

Re: AV5 axle Ratio

Post by ian24ian »

found the stamping, after an hour of gunking and jet washing, I now smell and am rather moist, the ratio is a 9/41 which is a 4:55
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gazza82
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Re: AV5 axle Ratio

Post by gazza82 »

ian24ian wrote:... I now smell and am rather moist ...
:shock: ... far too much information for our friendly-family forum ... :wink:


:rol:
"If you're driving on the edge ... you're leaving too much room!"

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Big Daddy
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Re: AV5 axle Ratio

Post by Big Daddy »

gazza82 wrote: :shock: ... far too much information for our friendly-family forum ... :wink:

:rol:
As usual, it's all in the reader's mind... :whistle:
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