Re: MPH = RPM's
This always throws me....I swear mine turns a slightly higher RPM than everyone else. I have a 4l80e also, 3:73's but a slightly smaller tire, and turns like 300-400rpm higher than you with the 4;10's.
Then again, my lockup converter might be smoked, so it might be the slip during lock.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING 
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