Transmissions and Drivetrain Need help with your trans? Problems with your axle?

what speedometer gears to use??

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Old Nov 7, 2007 | 09:59 AM
  #1  
camaroracer1992's Avatar
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Joined: Sep 2000
Posts: 406
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Car: 1992 Camaro RS
Engine: 355
Transmission: th400
Axle/Gears: 3.89
what speedometer gears to use??

I just swapped a th400 into my 92 camaro rs that was a tbi car. I need this adaptor http://store.summitracing.com/partde...D60115&FROM=MG

what gears/speedo sender do i need to make this all work with a 28" tire and a 3.89 gear?? Thanks. Would i calculate the speedomter for the mechanical to work and it'll work automatically for my electric?? Any help is appreciated thanks!
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Old Nov 7, 2007 | 10:22 AM
  #2  
bilms01's Avatar
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Joined: Jan 2007
Posts: 382
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From: Illinois
Car: 89 Firebird
Engine: 350 Ramjet
Transmission: 700R4
Axle/Gears: GM 9 bolt 3:27
Re: what speedometer gears to use??

Google can be your best friend. There are many speedo calculators, just search.
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Old Nov 7, 2007 | 12:25 PM
  #3  
Whiplash's Avatar
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Joined: Oct 2007
Posts: 17
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Re: what speedometer gears to use??

You will need a 15 drive gear (Inside) and a 42 driven (outer) and a 40 range housing.
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