Uberoo Posted January 7, 2014 Share Posted January 7, 2014 I'v been hearing conflicting data about the rear diff ratio on a Gen 1 brat.So short and sweet what is the rear diff ratio under a gen 1 brat with the EA71 and top mount starter FWD-4wd transmission? Quote Link to comment Share on other sites More sharing options...
turbosubarubrat Posted January 8, 2014 Share Posted January 8, 2014 3.9 is the ratio printed on the plate on the diff cover covered in dirt and road grime. Quote Link to comment Share on other sites More sharing options...
Uberoo Posted January 8, 2014 Author Share Posted January 8, 2014 I was hearing that it was either 3.7 or 3.9,Mine doesn't have a tag which is why I was asking. Quote Link to comment Share on other sites More sharing options...
talldude Posted January 8, 2014 Share Posted January 8, 2014 3.9 Quote Link to comment Share on other sites More sharing options...
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