I have a 323 posi rear end the speedometer is reading to quick what size teeth do I need for a th400 tranny.I have super stock II wheels.

 

There are different sizes of SS11 wheels nowadays, and you haven't said what size tire you're running. Did you change your wheels/tire size or gearing? You need a combination of Tire/wheel size and gears to determine what the speedo gear will be. There's a way to calculate this. I got it from a guy on ebay who sells speedo gears, but I have to look it up.

Please post your
1. Wheel size
2. Tire size
Without that, it's a crapshoot.

 

You need a gear with more teeth to slow down your speedo, how many more teeth depends on your tire size and diameter...

 

Check with the shop that calibrates the cop speedos' ...

 

This guy will know. http://cgi.ebay.ca/GM-67-68-69-70-71...item5885153446

I got my gear from him. All I had to do was tell him the rear gears, tire and wheel size and year.

 

I have bought gears from here: www.speedometersolutions.com and www.bobsspeedometer.com is well known...check out his website.

 

My car has 245/60-R14 tires the height of the tires are 24" of the ground camaro 69 on ebay told me a need a blue 38 tooth gear does the sound correct for a 3.23 rear th400 tranny

 

He nailed mine, and has a good reputation, so I have no reason to believe he would give you wrong information. If you're not 100% sure, double check with him.

 

This might help


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