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Take yourr current gear ratio and subtract the difference between the two. 3.73 - 3.15 .58 so around 580 rpms. Roughly

Just do the math.

Just bought a 2014 GT convertible. And am not familiar with the 6 spd automatic. I had a 04 Mach 1 and loved the 4.10 I put in it. Am debating on 3.55 or 3.73, Wife thinks it is fast enough already with 3.15 ...well you know.lol Anyone with either give me your thoughts, Thanks

I do recall tuning it and going to the track and it being slow. Thought I was somehow having a traction issue. Put a slower tune on it so I thought but went to a 12.5 after tuing it. Then it being a conv was told not come back until we had a bar in it.

I have programmed with the Diablo Predator tune and it seems to not do it until we notice that it hasn't happened in awhile. And somehow it seems to loose the tune and we have to tune it again. Question is should it be reflashed by Ford and then retune with the Predator?

Girlfriend's cobra cuts off on occassions. Check for codes nothing showing up. But then again I heard that with a tuner some codes wouldn't show up? Got it with a pulley and the Diablo tune whcih it runs great and I have had it cut off once with me. Popped the clutch and it fired up. it happens...

Have a question on the 998 code. FMEM it sets parameters within the range when a sensor fails. Just so happened it was my ECT. Replaced it haven't had a chance to check codes again but am having an issue with one side of my coil pack not firing and the fan still wouldn't come on. Fan works, can...

My girlfriend bought a 2.3 conv 93. the ac and cooling fan don't come on. I found the constant control relay module and can make them come on. So to me that eliminates that being the problem. So between there and the rest of the car there seems to be something missing? Got a relay from parts...