I have an 88 rolla and I raced at the Solo autocross last year. Its a 3 speed auto tranny and I manually shifted for all the gears. Yes in this aspect it will take a toll on the tranny from running it this hard, but for daily driving I dont see it being an issue if the rpm's are low enough to allow for the tranny to shift down without putting to much of a load on the engine.
I have an 88 rolla and I raced at the Solo autocross last year. Its a 3 speed auto tranny and I manually shifted for all the gears. Yes in this aspect it will take a toll on the tranny from running it this hard, but for daily driving I dont see it being an issue if the rpm's are low enough to allow for the tranny to shift down without putting to much of a load on the engine.
Downshifting with a corolla AT will not hurt anything. I have never tried revving the engine to 3000rpms in neutral then slamming it into drive nor would I recommend doing that.
Downshifting with a corolla AT will not hurt anything. I have never tried revving the engine to 3000rpms in neutral then slamming it into drive nor would I recommend doing that.
my m8 at work did it in his VL n it screwd up the tranny, he had the toughest tranny possible n lost 1st n 3rd so i really wouldnt reccomend doin nething like dat.
downshifting your auto tranny to further slow down the car is something i have tried in the past for fun. like with everything else, there are good and there are bad. engine braking does in fact help the car reduce speed quite a bit and also provides that nice downshift feel motion like you get from a manual (along with a nice sound if you have a performance exhaust). HOWEVER, like silver04rollas said, engine braking does cause wear and tear on your engine, especially if you over-rev when you downshift. even if you downshift well within the gear range, it will still cause some wear-and-tear on the engine and can heat up your transmission oil.
downshifting an auto tranny is really fun to simulate the manual tranny feel, but it really comes at a cost. i guess if you really want to keep on doing it, you pretty much have to know each gear limit and range on your car so when you do downshift, you can downshift at the proper speed range to prevent over-reving.
downshifting an auto does have benefits, especially if you misjudge your braking distance between a stopped car ahead of you and you're about to rearend the person, downshift would really help. as long as you don't keep doing it each time you brake, it should be okay.
Don''t be a fool and use the engine braking as a means to brake. The engine is meant to propel the car forward while the brakes are meant to slow the car down. If you shift from D to 2 even at reasonable speeds, it will cause the car to over-rev and hit the red line once you downshift like that since you might not know but, you might do a straight downshift from overdrive(4th in D) to 2nd since I have an 04 Corolla S myself and I know for a fact that the new Corolla auto spends a surprising amount of driving time in the 4th gear. If you slow down sufficiently that you are confident the car would not over-rev( and had automatically downshifted to 3rd) then it would not do any harm. The only place where it is recommended to use engine braking is when you are going down a mountain grade and the normal brakes alone will not be a that effective. Keep the purpose of engine and the brakes clear in your mind.
well, its not like it'll overrev THAT easily, you could be driving at freeway speeds and drop it into 3rd (notice i didn't say 2nd) and you still ahve a good amount of room to go before its in redline.
With the auto, it won't let you overrev on a downshift. You can downshift into, say, 2 at 80 and the transmission WILL NOT DOWNSHIFT until the speed falls low enough such that it can get into 2nd without going over the rev limiter. (This is the absolute 5,600 RPM limiter, not the shift-point 5,200 limiter.) Yes, as soon as you slow down to 75, the transmission will happily throw you into 2nd at 5,500 RPMs or thereabouts, but...Toyota thought of these things.
Other things I've noticed:
Shifting into neutral with cruise control engaged automatically disengages cruise control.
You don't have to depress the shift knob to shift into 'natural' modes. IE, 1st to 2nd doesn't require the knob in, 2nd to D doesn't require the knob in, D to N doesn't require the knob in. N to R requires the knob, D to 2 requires the knob. It's a stupidity-override. You can't downshift accidentally.
I haven't tried shifting from D to R while the car is in gear and moving along, because if Toyota doesn't accomodate that level of dumb, it would be a very expensive way of finding out.
Mythbusters just did a show on that and they showed that new AT's are designed to not engage R or P while driving down the road, so if you put them in gear while driving it will not tear the car up. However they tested that at 50mph, but its possible the gears would catch if only driving 5mph or less.
yea thats in the new auto, old ones arnt that smart, im serious dont do it, even if u can do it without hurting it to much (ull hurt it no matta wot) its just being an idiot if u wanna drive an auto up shifting and downshifting then get a manual, just my opinion but its upto u dude
I may be misreading your post from your missing punctuation but if you are indeed calling people idiots for using the function thats made available to them from the manufacturer then that would be going a bit far. Maybe youre talking about shifting to R or P while driving. Its hard to tell without punctuation to seperate the subject, but if it was harmful to change the gears then toyota wouldnt give you the option of making the gears available to choose. I wouldnt choose R or P while driving, but upshifting nor downshifting the OD, D, 2, or 1 gears while driving will harm anything. Most of the time I put it in OD and drive but toyota gave me the option of choosing my gears so I do it every now and then.
I dont recommend leaving it in 2 and redlining it but even if you do it likely wont harm the engine. I max redlined my mr2 several times and all that happened was the engine's automatic safety cutoff engaged and my rpms went to idle for a few seconds. I never had engine problems in the several years that I had it so I believe there is no need to worry about downshifting and rpms with these toyota engines because theyre built strong and so are the trannies.
I may be misreading your post from your missing punctuation but if you are indeed calling people idiots for using the function thats made available to them from the manufacturer then that would be going a bit far. Maybe youre talking about shifting to R or P while driving. Its hard to tell without punctuation to seperate the subject, but if it was harmful to change the gears then toyota wouldnt give you the option of making the gears available to choose. I wouldnt choose R or P while driving, but upshifting nor downshifting the OD, D, 2, or 1 gears while driving will harm anything. Most of the time I put it in OD and drive but toyota gave me the option of choosing my gears so I do it every now and then.
I dont recommend leaving it in 2 and redlining it but even if you do it likely wont harm the engine. I max redlined my mr2 several times and all that happened was the engine's automatic safety cutoff engaged and my rpms went to idle for a few seconds. I never had engine problems in the several years that I had it so I believe there is no need to worry about downshifting and rpms with these toyota engines because theyre built strong and so are the trannies.
im not calling people idiots, they give u the option for when you are on a steep incline and u need to b in 3rd not 4th or 2nd not 3rd, im not saying your idiots i upshift in my auto magna but i would never dowshift
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