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Old 03-14-2011, 08:59 AM   #1
88WS-6
 
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Join Date: Dec 2010
Location: Hillsborough
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How to check rear gear ratio

I just want to make sure I do this correctly because I remember reading a few different things. I think there is a chart somewhere with rpms vs mph but I couldn't find one on any searches. I also thought that it was possible to count the teeth on the gears to tell what ratio it is.

As for some background, the original owner sold it to me and said he put 3.73 gears in it. When I had the shop change my speedo gear accordingly, it made the speedo even more off. Because I don't know how fast I'm going, the chart with rpms vs mph won't really work for me. I also just had the diff fluid changed, so pulling the cover and counting the gears would be a PITA and would require having that done again. Do I have any other options? Thanks in advance guys...

~Matt
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