Wheel Change
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Joined: Sep 2005
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Wheel Change
re: '93 Aerostar Ext AWD
currently have 14" rims ... told i could change to 15" from ranger truck
is this possible?
will it put everything out of adjustment?
all help appreciated
cheers,
GMAN
currently have 14" rims ... told i could change to 15" from ranger truck
is this possible?
will it put everything out of adjustment?
all help appreciated
cheers,
GMAN
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
Programmable Speedometer/Odometer Module, Aerostar
The speedometer is also used to provide a speed signal for correct operation of the vehicle's powertrain control module (PCM) (12A650), electronic transmission and speed control (if so equipped). Because of this, it is VERY IMPORTANT to change the internal conversion constant of the speedometer if the size of tires, or the rear axle and ring gear on the vehicle are changed. Changing the conversion constant to the proper value when the tires, or the rear axle and ring gear are changed will also make sure that the speedometer retains the original factory-set accuracy. The conversion constant can only be changed six times once the vehicle leaves the factory.
The speedometer is also used to provide a speed signal for correct operation of the vehicle's powertrain control module (PCM) (12A650), electronic transmission and speed control (if so equipped). Because of this, it is VERY IMPORTANT to change the internal conversion constant of the speedometer if the size of tires, or the rear axle and ring gear on the vehicle are changed. Changing the conversion constant to the proper value when the tires, or the rear axle and ring gear are changed will also make sure that the speedometer retains the original factory-set accuracy. The conversion constant can only be changed six times once the vehicle leaves the factory.
Last edited by 96_4wdr; Feb 28, 2006 at 02:19 PM.
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