hi i just bought a 01 focus with the 2.0 spi, 5 speed, i was wondering if i could replace it with one of the dohc motors transmission. as they are cheeper in my area there like half the price as a spi one. i know they are geared slightly lower but thats all i could find out. the reson i need to replace the transmission is because a the pin for the spyder gear wobbled out a destroid the transmission. is this a common problem?