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Old 04-28-2015, 08:32 AM   #1
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E30: 1991 325i 4 dr., 1984 318i 2 dr., 1989 325iX 2 dr., 1989 325iX 4 dr. auto.
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Default 3.73 gear set

In theory, I have always been curious about running 3.73 gears in my iX. My understanding is that they were used in automatic and manual Euro cars. I guess my question is about actual production numbers. Has anyone ever seen/had them.

The part number for the 3.73 front differential is as follows:
Realoem - http://www.realoem.com/bmw/showparts...87&hg=31&fg=15

Cross reference:

Wondering how hard it would be to find this gear set??? Any Europeans out there with some insight?
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Old 05-04-2015, 11:17 AM   #2
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3.73 gears were used in early model automatic ix's. early model manual ix's used 3.64 gears. All late model ix's had the 3.91m/4.10a gears.

Every once in a while I've seen the 3.73 or 3.64 gears on eBay.de

I picked up a front 3.64 several years ago off german eBay. It's not too difficult if you can find someone over there to facilitate with purchase and shipping.
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