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Provides control of converter lockup through vehicle speed on GM transmissions with a lockup converter. Eliminates lock and unlock cycling and premature lockup avoiding engine lugging and spark knock. Provides lockup at highway speeds for fuel economy. Can be used for lockup operation when converting a non-lockup equipped vehicle to a lockup style transmission and converter. - For GM automatic trans w/lockup converter & mechanical speedometer cable 8ppm pulse rate - TH-700, 4L60, 200, 200-4R & 350
- Provides dash mounted control to govern converter lockup at speeds between 30 & 90 mph.
- LED indicates converter as locked or unlocked
- Not legal for use on emission controlled vehicles
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