ARJ Posted July 19, 2014 Share Posted July 19, 2014 How do you tell if the final drive ratio is. 3.7 or. 3.9 Link to comment Share on other sites More sharing options...
bratman18 Posted July 19, 2014 Share Posted July 19, 2014 How do you tell if the final drive ratio is. 3.7 or. 3.9 Turbo is 3.7 it should be labeled on the rear diff. Link to comment Share on other sites More sharing options...
ARJ Posted July 19, 2014 Author Share Posted July 19, 2014 Dont have the diff only the gearbox is there a way to tell without dimantleing it ? Link to comment Share on other sites More sharing options...
Prwa101 Posted July 19, 2014 Share Posted July 19, 2014 Count the splines on the transmission axel stubs. 23 splines are going to be n/a. An 25 will be turbo. Prwa Link to comment Share on other sites More sharing options...
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