kobushi

I know that the STi as of 2005 uses a helical diff in the front... What about the rear? Is it clutch, VLSD, or helical? It makes sense that a VLSD could be turned upside down if need be (any diff I find to use will have to either be turned upside down or the gears reversed in either the front or the rear since spin will be in opposite directions); but what about helical diffs Are they up/down sensetive? I'll be putting a lot of power down in a light car, so I'd prfer helical IF I can make it work... if not then I can fall back on VLSD since at least it will function Tanks guys, --Ash

I am trying to find out which direction the driveshafts to the ront and rear diffs. turn during forward motion in a WRX. Trying to find out if my application will mate with the proper spin. Is the front diff a seperate unit like the rear, or is it integrated with the trans/center diff somehow? Could the front diff be removed ad used stand-alone like the rear? Or would I just need to use 2 rear diffs? My plan is to mount a motorcycle engine to each differential to power all 4 wheels. The motorcycle engine spins counter clockwise as you face the output shaft so if the diffs are normally turned clockwise viewed from the driveshaft, then it'll work fr sure... I could turn the diff upside dwn, but I don't know if that would effect the LSD functionality. Any thoughts or info would be appreciated. Thanks, --Ash