How to change the ratio of my rear differential

VICTOR65

MEMBER
1992 SUBARU SVX
131,000 MILES

I am swapping my trans for a 98 legacy and I need to change the ratio of the rear differential and I dont now if I swap the rack and pinions for the svx to the legacy trans or the other way around thanks

Friday, April 13th, 2012 AT 5:45 AM

9 Replies

FIXITMR

MECHANIC
9,990 POSTS

You mean ring and pinions?

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Friday, April 13th, 2012 AT 6:32 AM

VICTOR65

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Yes

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Friday, April 13th, 2012 AT 7:00 AM

FIXITMR

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Do you know what the 2 ratios are?

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Friday, April 13th, 2012 AT 7:49 AM

VICTOR65

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The one from the svx is 3.9 and the one from the legacy is.44

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Friday, April 13th, 2012 AT 5:00 PM

FIXITMR

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I take it you want to keep the 3.9? You would put the 3.9 into legacy trans since that's the 1 going into car?

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Friday, April 13th, 2012 AT 5:52 PM

FIXITMR

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Was there a reason you wanted to do this much extra work? Gas mileage?

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Friday, April 13th, 2012 AT 5:54 PM

VICTOR65

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20 POSTS

The legacy trans is going into the svx because the trans on my svx is shot

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Friday, April 13th, 2012 AT 6:32 PM

VICTOR65

MEMBER
20 POSTS

Ok so the 98 legacy trans is going into the svx but the problem is the rear differential has a diffrent ratio so I need to change the ratio of the rear differential

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Friday, April 13th, 2012 AT 6:41 PM

FIXITMR