OK I have 16 inch rims with 225/55/r16 tires off a 99 mustang and need to know what color speedo gear to get. The guy at my Ford dealer said he could not tell me which one to use. SO, I thought if any one out there has done a tranny swap or had one out they could tell me. He also said that c-4 and the aod trannys use the same gear ( interchangable ) Any thing has got to be closer than it is now. About 20-30 miles an hour fast!!!