hey rx7 peoples i was wondering if there is any difference in s4 and s5 auto tranny is it bolt on matter or what do i have to do... i have a auto s5 and my tranny is going out and i cant find any auto s5 tranny near me and i found a auto s4 so was wondering if it will fit or what i need to do to make it fit or do i need a s5

 

possible drive shaft difference maybe flex plates and torque converters