3:90 vs 4:11 on 5mt swap?

[lindstromjd]

So I've searched quite a bit and am still not fully understanding this...

I'm doing a 5mt/4eat swap on my '91 Turbo Legacy. The 5-speed transmission I'm putting in comes from a '94 Turbo Legacy.

I'm pretty sure I have the 3:90 gears in mine, and I know for a fact that I have the LSD rear diff.

Is the 5mt from the '94 going to have the same gearing as mine or do I need to get the rear diff too? Or is there a way to swap out the front transfer case on the 5mt so I can keep my LSD rear end?

[biggreen96]

yup the 94 should match your 91. both are 3.9.

[lindstromjd]

Is there an easy way to tell by looking which gears are in each diff/transmission? I just don't want to put everything together just to blow it all back up again.

[biggreen96]

There should be a sticker of the trans bellhousing with a code. Search for how to decode it and it should reveal the ratio. The dif as you know should have a sticker indicating it's ratio. OR put it all together and while still on jackstands put it in gear and watch the wheels go round, they go round the same amount front and rear then it's good.