Posted by Ben on November 18, 05 at 20:38:07:
In Reply to: Re: Changed from 3:73 to 4:10 posted by Ben on November 18, 05 at 17:38:13:
: : Changed the rear from 3:73 to 4:10. What a difference! No rpm change at all. Still 2300 @ 80mph. Would do it again... DriveTrainDirect.com did a great job as always (They did my other suburban).
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: If no rpm and speedo change and the same tire dia, then you got ripped off...it's the same gear ratio.
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This is assuming you had the speedo re-calibrated. You did right?
Otherwise any change in diff gearing will still have the speedo & tack read exactly the same, as they are reading it "before" the diff.