Question about speedo and FMX tranny

[rottenralph]

Two questions actually

question 1

Can bands be adjusted on an FMX. I think mine is slipping during hard acceleration and I want to know I rebuild or adjustment is likely solution.

question 2

PO put in 350 gears in back instead of 275 original gears but did not calibrate speedo. Do I need a new gear to recalibrate. If so, which one? Where is it?

 

[Mikes73]

On question 2, one would think a 21 tooth gear would get you pretty close. The speedo gear is located in the tailshaft housing on the drivers side. Look where the speedo cable goes in, remove the 2 bolts and pull the cable out of the tailshaft housing, the speedo gear will come out with the cable.

 

[Don C]

FMX bands are adjustable:



You can calculate the speedometer gears you need here:

http://www.7173mustangs.com/thread-speedometer-gears

 

[rottenralph]

I was able to open the spreadsheet. Just need to know what 6,7, or 8T drive gear. I have with an FMX. Any idea what the number goes with the T. I know I have 350 gears. That was confirmed when I had my rear seals removed.

 

[Don C]

You probably have a 7-tooth drive gear, which was the most common.