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Originally Posted by 97stangman
hi guys I am the proud owner of a white 97 mustang gt. I purchased a set of 4:10 gears but have heard horror stories of about not shifting right. what is needed other thn the speedo to get the trans and computor to work with the gears. I have been reading up on the hand held(predator) and such tuners and will that work for my 97 if not what did you guys have to do to the computer after installing the gears on auto trans car. thanks 97 stangman
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You needa programmer or a chip. You are running the risk of damaging your automatic.
A programmer/chip will not only recalibrate your speedo, but also adjust and firm up your shift points which is very useful for an auto.