what speedo gear?

smellmygas

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Sep 23, 2003

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Apr 12, 2004

#1

• Apr 12, 2004

• #1

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

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Sep 23, 2003

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Apr 12, 2004

#2

• Apr 12, 2004

• #2

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

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Apr 12, 2004

#3

• Apr 12, 2004

• #3

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

 

squeeeg

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#4

• Apr 12, 2004

• #4

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

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Apr 12, 2004

#5

• Apr 12, 2004

• #5

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

 

MUSTANGJOE

Silver Stanger

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#6

• Apr 12, 2004

• #6

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

 

smellmygas

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Sep 23, 2003

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Apr 13, 2004

#7

• Apr 13, 2004

• #7

squeeeg said:

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.

Click to expand...

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

 

smellmygas

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Sep 23, 2003

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Apr 14, 2004

#8

• Apr 14, 2004

• #8

anyone??? bueller? bueller?

 

F

FoxChasis

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#9

• Apr 14, 2004

• #9

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

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#10

• Apr 14, 2004

• #10

smellmygas said:

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

Click to expand...

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

 

smellmygas

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Apr 15, 2004

#11

• Apr 15, 2004

• #11

squeeeg said:

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

Click to expand...

thanks yo!

 

U

udlooz

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#12

• Apr 15, 2004

• #12

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

 

86T-Top

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Apr 15, 2004

#13

• Apr 15, 2004

• #13

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

 

F

FoxChasis

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#14

• Apr 15, 2004

• #14

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