C3 Corvette Forum
Tech/Performance/Info >> Transmission and Differential Questions and Solutions >> stevedubois1@aol.com

Message started by skibob927 on May 27th, 2017 at 7:53am

Title: stevedubois1@aol.com
Post by skibob927 on May 27th, 2017 at 7:53am
74 Vette w/TH400, want to change the differential gear ratio from 3:55 to 3:08 for frewway crusing.  will and C3 differential fit? how about C4's?


Title: Re: stevedubois1@aol.com
Post by Artsvettes on May 28th, 2017 at 9:29am
C4 will take a lot of work plus they are weaker than the c3 cast iron units. Have you thought of upgrading to an overdrive transmission? You can keep your 355 an criuse like you want to. I did a 200r4 in my 77 it was a pleasure to drive.........jack

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