Quote:
Originally Posted by fbsm
I've been tempted several times to purchase an xdrive bimmer but it seems like they just cant build a durable/reliable AWD xfer case.......Subaru has been doing it for decades....and you can literally beat the piss out of the subaru......but somehow the german engineers cant nail this one......disturbing
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I never really looked at how BMW had their AWD setup, but on Subaru's they don't use a transfer case, they use differentials. Also, AFAIK, Subaru uses the same sized tire front and rear, but BMW ... it seems ... likes to use a staggered setup where the front and rear tires have different diameters. IMHO, unless the AWD system is very loose, having different front and rear tires are a no no.. It's going to wear out the t-case or diff because it's going to have to unload the tension from the front and rear axles spinning at different speeds.. even if it's very slight.
Personally, I don't feel BMW or any car company should be shipping cars with different F/R tires when it comes to AWD.