T350 Trans gear ratio for 3.07 diff
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Cruising
Joined: May 2014
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From: South Australia
T350 Trans gear ratio for 3.07 diff
My sweet ride and my Bosses ride side by side.
Hi guys, I have changed my stock 81 californian C3 Diff from 2.87 to 3.07. I am also changing the speedo from 85 MPH to 140 MPH.
What plastic trans gear do I need to fit to make everything work ?
Last edited by 81C3Corvette; Jun 30, 2019 at 09:15 PM.
Race Director
Joined: May 2006
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using the formula on this site and assuming stock 27" tire and drive gear of 9 teeth it comes up with a 21 tooth driven gear
https://www.tciauto.com/speedometer-gear-calculator
https://www.tciauto.com/speedometer-gear-calculator
