what speedo gear?

[smellmygas]

im throwing in 3.73's and an aluminum driveshaft next week and i was gonna order the speedo correction gear but i dont know what all i need?
3.73's, t5 5speed, aluminum driveshaft if it matters, 17" tires.
can someone tell me what to get?
thanks

 

[smellmygas]

i was told from cjpony parts that all i need is the white 23 tooth gear
and it should be close....i dont really care about exact for now

 

[jrichker]

See http://www.hanlonmotorsports.com/t5speedo.asp for help

 

[squeeeg]

for your car you actually need a 21 tooth gear. The 23 tooth gear if for 90-93(maybe more) with the 8 tooth drive gear. The 85-89 t5 came with a 7 tooth drive gear, therefore needing the 21 tooth.

 

[The Communist]

The aluminum driveshaft sounds like something I want. Is my old driveshaft recyclable?

 

[MUSTANGJOE]

I just ordered a 23 tooth white gear of 5.0resto for my 3.73s.

 

[smellmygas]

for your car you actually need a 21 tooth gear. The 23 tooth gear if for 90-93(maybe more) with the 8 tooth drive gear. The 85-89 t5 came with a 7 tooth drive gear, therefore needing the 21 tooth.

can anyone confirm this? i want to order this today i dont want to get the wrong 1 though

 

[smellmygas]

anyone??? bueller? bueller?

 

[FoxChasis]

Driven Gear = Drive Gear x Rear Gear x Tire Revolutions Per Mile¹ / 1000

20.89 = 7 x 3.73 x 800 / 1000
21.28 = 7 x 3.73 x 815 / 1000

¹Factory tires are at 800-815 RPM. Aftermarket tires (even with the same specs as factory tires) are not necessarily at the same RPM. Check with the tire manufacturer.

 

[squeeeg]

can anyone confirm this? i want to order this today i dont want to get the wrong 1 though

order the 21 tooth that is what you need for an 88 t5

 

[smellmygas]

order the 21 tooth that is what you need for an 88 t5

thanks yo!

 

[udlooz]

the biggest one ford makes is red just bought one today from ford

 

[86T-Top]

Yes, he was correct that in 90 they changed the drive gear from 7 to 8 tooth on the T-5. I just got my gears done On friday and just went threw this. With a 89 and earlier stang with a T-5 and STOCK wheel diameter, you want a 21 tooth speedo gear. Since you don't have a stock size tire, you may need a different gear use the link that jrichker gave you.

Mario

 

[FoxChasis]

The change from 7T to 8T was a during the '89 model year, not between the '89 and '90 model years.