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Old 23-12-2018, 11:43 AM   #1
cougarmanouverer
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Join Date: Apr 2016
Posts: 77
Default 9 inch open to lsd conversion

I have a gradually increasing whirring sound coming from the rear end of my 69 cougar thats indicative of a wheel bearing. When i was under looking i found the tag of the diff which i found to be a 69 cougar 9 open diiferential with 3.00 ratio and a 28 spline axle. Is it as simple as replacing the guts of the diff with lsd gearing and how much would it cost?
The car is just a stock engine and only street driven with 295 tyres. What gear ration should i be looking for if i was to pursue this route.
The first thing ill be doing though is checking the bearings and axle before i went any further anyway
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Old 23-12-2018, 08:21 PM   #2
gregaust
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Valued Contributor: For members whose non technical contributions are worthy of recognition. - Issue reason: Greg always goes out of his way to provide assistance and support to members of AFF. Greg freely shares his knowledge with people who ask for help and often assists them with obtaining parts and repairs.  A great member of the AFF community. Technical Contributor: For members who share their technical expertise. - Issue reason: Always happy to offer assistance from his own experiences and often posts up photos when someone is having issues finding/locating something they are trying to repair or replace. 
Default Re: 9 inch open to lsd conversion

You'd be best looking to a true trac, replaces the open centre .

Ratio , if u like what you have stick with it
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Old 25-12-2018, 08:49 AM   #3
lincolnland
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Default Re: 9 inch open to lsd conversion

3.5 gears and a trutrac.
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