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Author
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Topic: Speedo drive gear?
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kkd
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Member # 4356
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posted
 
 
I'm running 3.73's and need to know what speedo drive gear to run. My T-5 was opened up and the gear inside has been changed from a 7 to a 6 tooth. So,I'm guessing, would I use a 21 tooth drive gear?
Anyone know by experience or know of the website that has the formula to use to calculate?
I have been told that you measure the circumference of your tire and plug the numbers into a formula and it spits out the speedo drive gear for you.
But, geez it has had to have been done thousands of times by members here.
I am running 3.73's in my 8.8 with 255/40/17 tires in my 1991.
Posts: 46 | From: San Jose | Registered: Apr 2004
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PWR HNGRY 302
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Member # 6000
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posted
Iam running the same gears in 8.8 with a t5 and i used a 21 tooth speedo gear from 50 resto and i think there is a link if you scroll down a little that tells you about the different speedo gears.
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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kkd
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Member # 4356
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posted
Thanks a bunch!
Posts: 46 | From: San Jose | Registered: Apr 2004
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PWR HNGRY 302
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Member # 6000
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posted
No problem.
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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Hungry Hippo
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Member # 537
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posted
with a 6 tooth drive gear you need an 18t speedo gear
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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Blind
2.3L
CAFords OG
Member # 3052
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posted
quote:
Originally posted by Hungry Hippo:
with a 6 tooth drive gear you need an 18t speedo gear
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21t would work if you hadn't changed the drive gear.
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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