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Old 10-18-2010, 06:57 AM   #5
Scooby Guru
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Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
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Developed Beater


Nobody likes thread jackers.....
Originally Posted by bigredOBS View Post
i have a question about final drive. not to thread jack. i have a 2000 OBS final drive 3.900, that chart in the link says the all the STI 6spds have a 3.900 final drive. does this mean i can just swap the rear diff from an STI straight across? any axle or drive shaft differences?
The rear diff will swap in. You will need to figure out (redrill) the smaller bolt pattern on the input flange. You will also need the larger STi rear knuckles and axles.

OP: Most if not all manual Foresters got the 4.11:1 ratio. There are no 3.90 Foresters that I'm aware of, so check the link above for more info. Some early Legacies came with 3.90 and are suitable donors, same with some EJ18 Imprezas.....

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