why wont manual shift work sometimes 2018 1.5 malibu
Wont work some of the time is it alright to use in normal driving to get more speed ?Do you mean the +/- range select on the shifter? On Gen9 it isn't really manual shifting. It's what they call electronic range select. For example if you're traveling in mountainous area and want to limit the shifting to first and second you set it to two. You can sort of control it on the downshift but it's not really manual like you'd see in manual paddle shifters.
Are you saying the buttons aren't working at all? Like you can't move to L4 or L6 etc? If that's the case it's probably worn out or something sticky got in there.
If it is intermittently able or unable to shift to the desired Lx mode (without a warning message) it is probably a dirty or worn connection. It's all programmed to avoid damage in the short term. Again, it isn't really a manual mode it is just a electronic range select. If you select L4, the transmission will automatically shift between gear 1 and 4. Instead of shifting to 5 and 6 when you reach a higher rpm it will just run at a higher engine speed. It will still protect though - if you near redline it will override and shift. Same for downshifting - if you are traveling say 75 in L6 and click down to L2 it will downshift to the highest possible gear or even say "shift denied" on the DIC. The manual says to use it for towing or driving downhill. Many drivers use L6 since it is basically the same as D but without Auto Stop. If limited to L3/4/5 to have more available torque, I would think the only consequence would be higher long term rpm averages and higher fluid temp (depending on speed) and thus internal components would get a little hotter.
thank you I just bought and this is a great help in understanding car Mine is a 2018 LS 1.5 TurboThe electronic range selection is almost exactly like transmissions of earlier years. When those were shifted from D to 2 (on most, not all), it shift into 2 immediately (or try to). When started from a stop, it would shift from 1 to 2 at the normal time but never make it to 3 (Drive).
Yours is a bit different based on what @campb292 shared, in that it will upshift past the selected range if it needs to prevent damage to the engine from over-revving.
On my Gen7 with "M" mode, it works similar to what you expressed. It indicates the gear selected and will shift down only to keep from lugging the engine (protection). Once it has gotten to 1, it will not upshift until you press the Shift Request button or put it back in "D". If the engine hits redline, the computer just turns off the fuel to cut the engine, and once it is below a certain RPM, it turns the fuel back on.
What are you asking here? The vehicle will upshift to 6th gear at light throttle around 45-50 mph, at full throttle it will never hit 6th gear because you'll hit the speed limiter in 4th or 5th gear.So The Best way to go from 1 to 6 gear is to start at a stop or slow speed Ilike to try to use timer to see how many sec. from 0 to 60 and a little drag racing with possible victim's