I've been researching this, and Phil, I believe that is incorrect.
Exactly, and why would someone spend 775 on a torsen, 190 on gears, plus money for the install kit and the labor of swapping everything when you can buy a brand new iron diff all complete with 355 or 373 gears for 900. Doesnt seem to make any sense.
You didn't say it was financially unwise, you said it wasn't possible. Just trying to prevent misinformation on an already murky subject.
That was my understanding also, first thing I wanted was gears. Then I read on American Muscle that you had to install a different differential or as us old guys called a carrier. By the way why would Ford do this anyway, to increase cash flow maybe?? So recently went back to AM and can't find that reference anymore. So is it just a matter of a different, lets just call it the thingy that the ring gear bolts to, or is the entire housing required??
Finally something that seems to make sense. So the 3.15 gears have an aluminum housing while everything else has a cast iron one. It still doesn't make any sense why Ford would make the housings a different size internally, I can understand the reasoning for different materials. It's almost like they got a real deal on the housings somewhere then had to redesign to fit the physically larger gears.:doh: Had I known this two years ago I'd probably still be driving my Grabber Blue 2012.
No the 3.15 comes in either iron or aluminum. Automatic is aluminum manual is iron. Housing are different material but the same dimensionally