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Old 02-24-2009, 08:10 AM   #3 (permalink)
Nevyn
Master EcoModder
 
Join Date: Nov 2008
Location: 18603, USA
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The Crimson Crawler - '04 Hyundai Elantra GLS
90 day: 36.71 mpg (US)
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It might be possible to wire in a light to the Torque Converter lockup solenoid (if your car has one) that lights up when the solenoid engages lockup. The only other way is to watch the tach for the lockup drop - it'll be smaller than a shift, but still noticeable - say, 300 to 500 RPM, depending on design.

If I get a chance to bum around with my buddy, he's got a '99 Accord V6 auto, I can get you more definite info.
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