i need help

Topic: i need help (Read 765 times) previous topic - next topic

i need help

October 18, 2006, 09:11:51 PM

ok, i just got gears, but now one of my friends that just put in the same gears as i have (3.73) in his car (96 mustang) that they had to do something to the speedometer and also tune the computer. do i have to worry about any of this stuff

i need help

Reply #1 – October 18, 2006, 09:28:44 PM

If you have 3.73 rear gears you need to change the speedo driven gear. If you have a stock AOD you need a (black) 23 tooth speedo gear, if you have a mustang or Super Coupe AOD you need a (purple) 21 tooth gear. The reason is that the T-birds have a 8 tooth speedo drive gear where as the SC or Mustang AOD has a 7 tooth drive gear. The reason your friends mustang had to be "tuned" is because the trans is computer controlled and has to be adjusted for the rear gear change. You AOD dosen't have a computer so just change the speedo driven gear and you're good to go.

i need help

Reply #2 – October 18, 2006, 09:42:22 PM

ok, thanks for the help.
where would i find a 23 tooth speedo gear though?

i need help

Reply #3 – October 18, 2006, 09:54:45 PM

Here ya go: http://www.mustangsunlimited.com/itemdy01.asp?T1=DFM17271J+01&Category=Drivetrain&subCategory=Speedometer+Gears&CatKey=74-01

i need help

Reply #4 – October 18, 2006, 10:05:03 PM

why does it say use with a 4:10 gear? or is that just a example?

Speedometer "Driven" Gear, 23-Teeth Black, for Ford Automatic Transmission.

Nylon 23-teeth black speedometer "driven" gear. Commonly used with 7-tooth speedometer "drive" gear and 4.10:1 rear axle ratio.

This is the gear located on the speedometer cable.