legacycentral bbs

I'm DONE with my tleggy 5mt. 1800 into it and it slips into 1st for no reason leaving me to pull it apart to shift it out.

anyways after a lot of searching I need info from someone whos actually done the swap. I need to know if I get a wrx tranny with 3.90. can I just swap my tleg 5mt tailhousing to match the stock 3.90 rear dif? also if I do that will i need to change the driveshaft?

There's no WRX tranny with a 3.9 final drive without a 1.1:1 reducer to the rear, I think that's what you meant?. If you were to find a WRX one, just get the rear DIFF at the same time, that would be easier than taking apart both trannys to keep your rear diff. 2002-2007 US WRX's all got VLSD rear ends.

I haven't done the exact swap you're talking about, however I have a JDM WRX tranny (with a 4.11 final drive), I reused the manual driveshaft, and the mechanical speedo cable from the SS plugs in. I think the cases where you need to worry about the driveshaft is 5mt to 6mt, or auto to manual.

I do know that the front gearing on a wrx tranny is 3.9 and the tailshaft is 1.1.1 reducer and the rear diff is 3.54 or something like that. but I should be able to put my tailshaft reducer from my tranny and put it on the wrx to be able to keep using my 3.90 rear end. But again I need someone who has done this swap.

The only reason I would see you not being able to use your current reduction transfer gears is if they changed over the years. But I don't have experience to tell you whether that can be done.

I actually found someone who knows. It's possible, I'll let you know once i find a sutible tranny