My fox is in big need of a new tranny and differential, only problem is, the differential i need is 31 spline and the tranny i need is input 10 output 28. Am i going to need to spend some extra money to get the right ones? As it is im looking at 2k for both and cant really soend much more than that. Is there a sight that has better options? Ive looked on american muscle, lmr, and cjpony parts and they all have the same, 28 tranny and 31 diff, but that doesnt make sense because it wont work.