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10-18-2016, 08:19 AM
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#1 |
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Registered User
Join Date: Mar 2011
Location: Elizabethtown, Kentucky
Posts: 322
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TH400 Speedo Gear
Recently changed my rear end gears from 3:08 to 3:73. Obviously now my speedometer is reading fast. Trying to find calculator on what gear to use to make it correct. Using stock speedometer. 3:73 gears and rear tire overall height is 28.7 inches. Any help would be appreciated. I have no idea what is in there. It was pretty dead on with the 3:08's.
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Thanks, Casey  71 Chevy C-10 SWB 350/400 PS, PB The Build http://67-72chevytrucks.com/vboard/s...d.php?t=584045 The Brake Upgrade http://67-72chevytrucks.com/vboard/s...d.php?t=695699 |
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10-18-2016, 09:01 AM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,553
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Re: TH400 Speedo Gear
I like to use a ratio adaptor.
Like in here. https://transmissioncenter.net/shop/ And they have gears and calculators too. |
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10-18-2016, 10:19 AM
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#3 |
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Registered User
Join Date: Jun 2014
Location: lakefield,mn
Posts: 566
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Re: TH400 Speedo Gear
I like using the TCI trans site. You will need to know the number of teeth on the trans speedo gear.
http://www.tciauto.com/tc/speedometer-gear-calculator
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68 c10 swb stepper 68 c10 swb stepper 67 c10 lwb 06 gmc duramax |
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