What happens if you shift too soon

Shift Garage. Power Shifting: effective or disastrous? Zaer Zubab Ahmed. What is Power shifting and how is it done? Why should one power shift? Click to comment. Comments Comments Policy. Search titles only. Search Advanced search…. Everywhere Threads This forum This thread.

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Previous Next Sort by votes. Apr 14, 1 4, 0. Hey guys, I have a Fiat Siena HL which is manual 5-gears transmission like in photo link down but I want to know something, when my dad drives it he shifts too early like an early shifts, like when the car starts to move with first gear he instantly shifts to 2nd gear and the car didn't move that much, I already read in google that shifting too early will make the transmission works harder so it will consume more fuel, but am not worried about the fuel, All am worried about is the transmission itself, I mean, will the transmission gonna lose it's power and becomes weak?

SO the transmission will be able to reach it's red-line or before? BFG Honorable. Sep 17, 2, 11, Every throttle opening has its own torque curve, and lower throttle openings shift the whole curve to lower RPM. The object of shifting is to hold the gear until torque starts to drop off, so that upshifting will not put things too low in the RPM curve to produce reasonable torque--if you did it perfectly, the torque produced should match at both RPMs.

The point is to maximize the area under the curve, so if you either buzz the engine up to redline well past where it produces good torque, or drop the RPMs too low to produce good torque, you are losing efficiency and wasting fuel. Back then, if you opened the throttle to just before where WOT fuel enrichment occurred and selected gears to match that , you would get the most efficiency at the expense of highest NOx emissions because it would run leanest.

But there are limitations to this. If you shift too early, you run the risk of lugging your engine, asking it to move your car forward at an unnaturally low RPM. For more details, and a side-by-side comparison of the fuel efficiency achieved in 2nd, 3rd, 4th and 5th gears at identical speeds on the same stretch of road, watch Fenske's video below.

Even if it's just a couple bucks here or there, any little bit of money you can save on gas is worth it. Join Now. New Cars. Car Culture. Type keyword s to search. Today's Top Stories. R for