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Old 06-20-2008, 07:35 PM   #1
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Speedo gear to use?

My camaro has a t5 and im putting 3.73's in my rear. Does anyone know what speedo gear i need in to put in the trans to make the speedo read right? any help would be appreciated!
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and once i get PHB, what do i ajust it too?
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Old 06-20-2008, 08:35 PM   #2
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You need a 15 tooth (gray) drive gear and a 43 tooth (purple) driven gear if running stock height (26") tires.

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Old 06-20-2008, 08:43 PM   #3
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That's funny you posted this, I was just thinking about asking the same question till i saw yours. however I have 3.73's with a 700r4 and we have tried a couple different ones and its still off by 7-10mph.
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Old 06-20-2008, 09:12 PM   #4
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The trans doesn't matter. Tire size and the rear gears are all you need to figure it out.

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Old 06-20-2008, 10:51 PM   #5
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Thanks for the info!
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Old 06-21-2008, 02:02 AM   #6
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The trans doesn't matter. Tire size and the speedo gears are all you need to figure it out.

- Justin
you mean rear gears right? where is the second gear? we replaced the speed sensor gear but its still off. and i tuned my car with a hypertech and its still off pretty bad. the faster i go the more its off.
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Old 06-21-2008, 07:04 PM   #7
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Yea, rear gears....fixed first post. Both speedo gears are in the trans, one is attached to the speed sensor, the other is on the output shaft of the trans. You have to take off the tailhousing of the trans to change it.

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Old 06-21-2008, 09:34 PM   #8
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ohhhh, that sounds like fun.
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Old 06-22-2008, 04:09 PM   #9
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No big deal just a few bolts and some trans fluid spillage.

- Justin
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Old 06-22-2008, 10:53 PM   #10
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thanks alot man, i appreciate it

but where could i find the gears? (aka purchase them) i tried this site and couldnt find the ones you said i needed

http://www.transmissioncenter.net/sp...c.%20Gears
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1983 camaro- Scrap
1988 camaro- Also scrap
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Quote:
Originally Posted by LS1ow View Post
and once i get PHB, what do i ajust it too?
Quote:
Originally Posted by Jersey Mike View Post
Seven.

Last edited by wretched73; 06-22-2008 at 10:58 PM.
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Old 06-23-2008, 08:20 AM   #11
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Here's a link to a speedo gear calculator.

Plus if you know what you need you can go to a GM dealer & buy them.
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