i just replace my cheapo crank on my y33 with a xt m752. the front derailer is an xt along with the rear. i had a 73x113 bb and deceided to upgrade to the 73x 118 because of it being octalink. my problem is this: it rubs on the granny gear when it goes into the granny gear, it rubs on the big gear (front). it wont go into the granny gear if i am in the 4th gear or higher (rear). if i am in the thrid or lower then the front derailer will drop it down..... any help is appreciated. the front adjustments are just about maxed!