id put those old tires on a pair of junk rims just in case they fail...it would be a shame to ruin a good set of rims...cant wait for it to snow though
As with the tranny, its the one they use in the E55, i doubt a couple of donuts is going to hurt it...besides, i dont do it all the time, but i do believe in having fun and i DO care about fuel mileage.