Well, thank you for your response, but I am not a new driver and this particular vehicle I've been driving for about 8 years. I am, by this time, well aware of how to drive a standard transmission vehicle.Well, thank you for your response, but I am not a new driver and this particular vehicle I've been driving for about 8 years. I am, by this time, well aware of how to drive a standard transmission vehicle.
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D4, that is overdrive in a 4 speed automatic. It should go into 4th gear at about 45 mph, although you may not feel it shift. The only reason to use D3 is if you are driving slow, like in city traffic, and the D4 keeps shifting in and out (from 4th to 3rd and back), as if it is "hunting gears". Most people just put it in D4 and drive away.
first thing to check is transmission oil level and quality. If that is fine than your looking at either a valve body problem (valve body is what controls the selection of gears) or possibly a problem with the bands on the planetary gear set, they can be tightened in certain models. However i dont think it is the bands. Does the overdrive only engage 4th gear? or does it feel like the gear ratios are different between overdrive and normal before the problem happened? some overdrive buttons engage final gear and some do as much as change gear ratios like in a cvt (contantly variable transmission) and some just change the timing in the gear changes to provide more rpm/power. My best guess is that the valve controlling the overdrive in the valve body has failed and therefor you dont get a response from the transmission (i.e no gear shifting when overdrive is selected)
Normally while driving in overdrive (4th gear) you will feel it start slipping and finally slide into third gear. Then 3rd gear slips out into second, and you will never see 3rd or 4th gear again. I'm guessing this was the problem? If so its time for an overhaul
Transmission does not shift automatically, only manually. Swap in a known-good PCM, check wiring, check other sensors such as VSS and TPS. Trans shifts into gear harshly, car feels sluggish off the line,
No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are
only available gears, CEL is on: Transmision is either in limp-home
mode or has lost electrical power. If there are lots of error codes in
the PCM, check the underhood fuse that powers the transmission, and if
it pops again, look for a short in that circuit like an O2 sensor
harness touching exhaust. Otherwise, check PCM codes for a particular
fault in the transmission causing the PCM to put it in limp-home mode.
Car goes into gear but feels very sluggish like the brakes are dragging,
but it will roll easily (starts out in 4th gear), you manually shift to
2 to get it moving, once it's moving you put it back in OD and the car
shifts 3rd to 4th on its own and locks the converter at the appropriate
time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem
from PCM to trans.. or PCM.
Common problem..we keep ours in drive..4th when traveling in hilly areas because tranny keeps shifting into overdrive...5th. I know they should not shift like this but if you try that it will solve your shifting problem without spending hard earned dollars. :) hope that helps.
There isn't anything wrong with your car. This is perfectly normal. I have a 2000 ES300 as well as other people that I know and it operates in the same way. Overdrive doesn't mean the same thing for every car or transmission. In our case overdrive is simply a reference to the top gear which is 4th gear. When you switch overdrive off(which is depressing the button causing the O/D OFF dash light to illuminate,) the highest gear becomes 3rd because you turned 4th gear or overdrive off. The application scenario for this is usually mountainous terrain where a lot of uphill driving makes it more feasible not to up shift into 4th gear while ascending and descending. It will not switch back to overdrive or 4th gear until you re-engage it by turning the overdrive back on or repressing the button. Again, when the O/D OFF dash light is illuminated, overdrive which is 4th gear is off and the highest gear will then become 3rd. It will never shift into 4th gear while this light is illuminated or overdrive is off. When you press the button and the O/D OFF dash light is NOT illuminated overdrive is on and therefore it will shift into 4th gear as usual. This applies to all 97-2001 ES300's and probably any other car you drive tat exhibits this same type of change when overdrive is turned off.
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Well, thank you for your response, but I am not a new driver and this particular vehicle I've been driving for about 8 years. I am, by this time, well aware of how to drive a standard transmission vehicle.
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