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Paul_Hedley
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Differential

Does anyone know if the differential ratio is normally stamped anywhere on the casing?  I'm curious to know what is actually in my car.

Thanks

Paul

garybee
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Edit: must not get involved in forum debate, forget every now and again.

djg
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I have a ford diff c/w lsd fitted in a 96 super light with de Dion and the ratio is stamped on the horizontal flat face just behind the nose. If you get under the car and diff and look at it just clean the flat faces and it could well be there.

Duckpit
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google it and you will find that you can work it out by jacking the car and counting turns on propshaft and wheel, its also different for LSD

Paul_Hedley
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Thanks everyone - a job for the weekend perhaps.

Paul

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Paul Hedley
http://mostlyharmless.org.uk/caterham​
​Caterham 21 - '97
Vauxhall 'red top' engine
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Jonathan Kay
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... you can work it out by jacking the car and counting turns on propshaft and wheel, its also different for LSD

Or by measuring the engine speed and the road speed eg by GPS as recently discussed. You can measure the gear ratios the same way.

I got this wrong before about deducing the presence of an LSD but I don't think that affects this method of measuring the final drive ratio if you fix one wheel and count the ratio of turns and remember the factor of 2...

Jonathan