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Discussion Starter · #1 ·
Hey all, I searched but did not see this, sorry if a duplicate.

This morning driving to work going around 35mph and was coasting down a hill with the foot off the pedal and felt a minor tug now and then and looked over at the RPM and it was floating to 2 and then up close to 3 and then back down to 2...etc.

Is this because the turbo was spinning from air flow?
 

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was the tranny 'gear-hunting'? sometimes downshifting will occur to help slow the car down, or to keep it in control.
 

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you probably feel the lockup torque converter disengaging - then the tranny shifts into another gear to keep the transmission gearing appropriately matched to engine rpm .

Most lock up converters disengage when you lift off the throttle or hit the brake pedal, then the tranny goes into a lower gear so you have responsiveness if you need to accelerate again.

most notice the above when coasting downhill.
 

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you probably feel the lockup torque converter disengaging - then the tranny shifts into another gear to keep the transmission gearing appropriately matched to engine rpm .

Most lock up converters disengage when you lift off the throttle or hit the brake pedal, then the tranny goes into a lower gear so you have responsiveness if you need to accelerate again.

most notice the above when coasting downhill.
just to add I think the Hyundai can do lockup in gears 4th thru 6th - this is supposed to help with fuel economy :rolleyes:
 
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