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You could buy (there might be a free bootleg one) a ECU tuner program to use with a laptop so you can do the changes to the up shift yourself.
I know this to be true with my '05 Ranger , I do not know about your '01, One of the Ranger forums will have the information on your '01 Ranger
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Save gas
Ride a Mtn bike for errands exercise entertainment and outright fun
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