superu Posted October 16, 2007 Share Posted October 16, 2007 Has anyone swapped a tranny and rear diff with different gearing from their stock gearing in a new gen Suby? If so what performance changes have you noticed?? Here's the scenario. . . I'm toying with swapping out the 5-speed 3.9 (final drive) geared tranny (and rear diff) from my 95 legacy to a 4.44-geared 5-speed from say and forester or later outback. I have done a strut swap and larger tires (plus some other stuff), and the car is a bit sluggish when compared to stock vehicles.. Yes, the 2.2 does not have the power of the 2.5, but the 2.2 is a strong motor and moves the car around well, and engine swaps are out of the question... The BF Goodrich website has a cool "off road tire size" tool(http://www.bfgoodrichtires.com/bfg/productIdSubmit.do) that tells you about ground clearance, acceleration, highway performance, speedometer and how to regain performance when going with oversize tires. From this it looks like a taller-geared tranny would help my car run "more like stock"... Expereinces, ideas, comments.? Link to comment Share on other sites More sharing options...
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