im_stuck_in_iraq

I have 3.73's in my stang how do i make it so that my spedometer is correct. It pisses me of I never know how fast i am going...thanks

nitrous_bob

you can't...unless you get a speedo calibration box from someone that does cop cars

your car would need like a 25 tooth speedo gear and they only make 23's and those will break in an aod

it requires changing the drive gear and driven gear, an aod needs the output shaft replaced to change the drive gear

86HOGT

Change the speedometer driven gear. Mine was a red 21 tooth but yor's is going to be different

black89gt

i dont think AODE's have speedo gears. you might have to burn the comp somehow. thats what my cousins friend did with his 02 gt that has 4 10's in em.

nitrous_bob

yeah they do...

Drive85mustang50

they have speedo gears dont they. 50resto.com sells the speedos i think

im_stuck_in_iraq

thanks ill look but if they dont have it i am pretty much screwed right? i dont know how far off it is but everybody passes me when i think i am going the speed limit that dont last for to long ha ha

Blaze86Vic

Well find out how fast you are going.

Your gear set is
1st-2.40
2nd-1.47
3rd-1.00
4th-0.67

http://www.f-body.org/gears/

nitrous_bob

the largest gear you can get is a 21 tooth(purple) for an aod , and those are for 3.27's (w/ your tranny that has a 8t drive gear)

how far off depends on what gearset you had b4.....but you could be anywhere from 10-20%off

Blaze86Vic

Here is a post on which gear for what.

https://mustangforums.com/m_201146/tm.htm

You can get a 23 tooth gear gear from this site as well as others. It's close to the bottom.

http://www.transmissioncenter.net/sp...n_______va.htm