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Just got a power stroke

Just bought a real clean 1996 F-250 CrewCab, short bed 4x4. It does have

170000miles

This truck has a 6in lift and 35in tires.

When running empty it can shift real hard between 1 and 2, and also 2 and

  2. Worse when running slow. Shifts better when putting the peddle to it. Shifts great when pulling my trailer.

Can it just be my speedometer(off about 10%) being off and giving the wrong information for the shift pattern.

If so what is the best way to correct. Reprogramming by the dealer , or aftermarket correction like TRUESPEED.

Also I know some aftermarket programmers(like Diablo or Superchips) can change shift patterns on newer trucks, but not sure about older than 99

Reply to
Phoenix
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You can recalibrate the speedo yourself it isn't that hard if it has the electronic odometer. These trucks can shift hard, you might look into a trans command module from Banks they have been known to help. For more info than you will ever need go to

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it's a great site.

Reply to
JSMMV

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