Speedo Gear Instal.

[N A]

Where can we find the black 23T speedo gear? (Steeda lists a white 23T gear on their website).

[mrltd]

Mine is purple IIRC....

[N A]

Short or long snout?

[88grandmarq]

Mine is purple IIRC....

Mike, I have heard that happens after being married and having a couple of kids ....

seriously... the purple gear is 21T and correct to an auto trans, which means is has a long snout.

N.A....... you can get the black, 23T gear from Mustangs Unlimited

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

[mrltd]

Actually it's blue...LOL..

I actually had 2 speedo gears for the 3.73's, I guess one was for the 26" tires and one for the 27" tires...

[N A]

Can we sort this information out and make it fact? Can we list the "speedo gear to rear gear" conversion colors somewhere?

'90 AOD car with 3.55:1 gears and 27" tires. Do I need a short or long snout, white, black 23T speedo gear or something else?

[88grandmarq]

what exactly did you miss ?

short nose gear are for manual transmissions, long nose gears are for automatic transmissions, THIS IS FACT.

The only factor in acuratley determining correct speedo gear is the which drive gear you have. in the case of an AOD, you could have a 7 or 8 tooth drive gear (this is machined on the output shaft). Assuming the transmission in your 1990 year model car is virgin (no one has replaced, repaired or rebuilt it) Most 1989 and newer passenger cars got an 8 tooth speedo drive gear.

there are several good online gear calculators, MrLTD has posted the link several times, there is also an equation you can use which is common knowledge and published in the FRPP catalog, it might be on the web page too.
Keep in mind, nothing is perfect. I have read the Factory says a 3-5% fast or slow reading error is acceptable. If you want it perfect, find a local speedometer shop and have them calibrate it.

[N A]

The www.steeda.com website has a white 23T gear listed, no pics. Search under "speedometer gear". According to the replies here, their info is incorrect. Is the black, long snout 23T gear is correct speedo gear?

[88grandmarq]

white gear is the short snout, for manual transmissions, black gear is the long snout for the automatic transmissions.
BTW... 23T speedo driven gears are typically for cars with a 3.73 final drive ratio. for a 3.55 gear, you probably need a 20 (orange) or 21 (purple) tooth driven gear, but you need to use the equation or on line calculator to know for sure.

[N A]

Where can I purchase the black, long snout 23T speedo gear?

[88grandmarq]

I posted a link on the first page of this thread. did you not see it ?

here it is again;

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