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Old April 16th, 2004, 10:39 AM   #1
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AUTOS- D3 or D4?

Just wondering, do you guys drive in D or D3? I first started driving in D3 thanks to the FAQ. I love the way the car drives in D3, but I was wondering if it's bad for the car at all or if wastes more gas? Thanks.
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Old April 16th, 2004, 11:07 AM   #2
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Use D for normal daily driving. it saves you gas pretty much and let gears go through all the way.

I heard somewhere to use D3 on local and D on highway but I always put on D and use D3 only when someone is bugging me hard or when I need a little higher rpm... such as... steep hill maybe.
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Old April 16th, 2004, 11:15 AM   #3
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Cool,,,thanks bro
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Old April 16th, 2004, 02:18 PM   #4
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Putting it in D3 will limit the transmission to the first three gears only, so you will get better performance out of your car for the more spirited driving that you might do. I also like to use it around town, drives better I find, Espessially with stop and go traffic. But on the highway D is the way to go.
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Old April 16th, 2004, 02:22 PM   #5
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Quote:
Originally posted by IvtecV6_ACCORD
Putting it in D3 will limit the transmission to the first three gears only, so you will get better performance out of your car for the more spirited driving that you might do.
NOPE, WRONG. It will limit to the first three gears yes, but this wont help performance any. When you floor it, the tranny still down shifts to whatever gear is best, usually 1st ,2nd or 3rd. So it wont matter if you have it in D3 or just D, its still going into those gears. This is all a perception thing with the 5sp auto. It actually helped a little in the 6th gen for other reasons.
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Old April 16th, 2004, 03:03 PM   #6
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Couple of things.

First, I was told the reason for keeping in D3 in city driving was to stop the tranny from shifting over and over and over again. Basically it was easier on the tranny is what I was told. (this could be totally f*cking stupid for all I know but whatever)

Second, there is a boost in limiting to 3 gears, think about it. If you are going 60 in 3rd gear and mash, you are in the peak of your power band without having to shift at all, you are there. Of course, this doesnt make a difference at all under about 60mph, but it means you will get the largest amount of torque you can get. At least this is what I think, but I'm a dumbass about cars mostly.

And unfortunately....it is D3 or D5....
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Old April 16th, 2004, 03:27 PM   #7
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okay thanks for the responses

what you guys think about the gas usage? is D3 gonna cause a significant drop( i don't mind for a little) in gass milage because it's at a higher rpm than D?
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Old April 16th, 2004, 03:51 PM   #8
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Sure its going to cause a slight drop in mileage, afterall you are bypassing overdrive by not allowing the transmission to shift into 4th gear. As long as the revs stay below 3 grand, you should not see that much of a change/decrease. It is not bad on your car/transmission to do this at all, infact actually saves your car from shifting so much when it does not need to. Staying out of overdrive is the only way that i can stand to drive an auto! (Hense why I have a 6-speed)
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Old April 16th, 2004, 05:07 PM   #9
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yeah bluspeed i feel you

i was reading my manual on my lunch break, and it basically said the same thing

im just gonna start using d3 for city and d for highway. The car just feels so much more responsive in d3 and you hear the intake a lot more (that deep sound). My only concern was if it was bad for the tranny but I think that's cleared up now

Thanks fellaz.
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Old April 16th, 2004, 05:48 PM   #10
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Simply put, "D" will keep your RPMs down, less engine noise, and the engine doesn't have any reason to be spinning so fast. D3 will give u almost immediate response in 3rd gear which makes it more fun. If i'm cruisin around 50 and know i wanna speed up considerably soon, i shift into D3 so OD don't take over. So yeh, if u plan on being on the highway or above 60-65, def. use D.
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Old April 16th, 2004, 05:53 PM   #11
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Quote:
If i'm cruisin around 50 and know i wanna speed up considerably soon, i shift into D3 so OD don't take over. So yeh, if u plan on being on the highway or above 60-65, def. use D.
Nightshift I'm confused, isn't that contradicting yourself? I mean, if you're going 50 then you shift into D3, you're obviously going to go over 60 right? I don't know maybe I'm misinterpreting what you're saying.
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Old April 16th, 2004, 08:46 PM   #12
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Old April 16th, 2004, 09:02 PM   #13
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Wow, what a useful remark, thanks.

Anyway, LIL, how is he contradicting himself. He is saying if you want less noise and plan on being on highway for a while, use D (OD). If you want to be running at a higher RPM so that you are easily in the powerband without having to downshift you should be in D3.
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Old April 16th, 2004, 09:12 PM   #14
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got it, Thanks again TriKKy
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Old April 17th, 2004, 02:41 AM   #15
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IMO, I would never drive around town in D3. It burns more gas and puts more stress (mostly more heat) on the transmission. I never hear of people driving around in 3rd gear around town with a M/T so why do it in an automatic?

I only use D3:
A. To keep it out of 4th for a short time (under 40 MPH).
B. For “spirited” driving.
C. For Drag Strip racing (3rd in a 6th gen can go to 120 MPH. Since my car can't do 120 MPH in the 1/4 I keep it in 3rd to prevent it from up shifting to soon.)



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Old April 17th, 2004, 09:39 AM   #16
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Your reason A is exactly why an auto would do it in traffic.
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Old April 18th, 2004, 06:42 PM   #17
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Quote:
Originally posted by TriKKy on April 17th, 2004 at 11:39 AM

Your reason A is exactly why an auto would do it in traffic.
6th gen AV6 transmissions tend to shift into 4th as low as 30 MPH, especially when you are barely touching the gas. I put it in D3 to keep this from happening and put it back into D4 when I go over 40-45 MPH.



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Old April 18th, 2004, 07:06 PM   #18
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Plum, if you do that "Shifting into D4 when you go over 40-45 mph" is that bad for the transmission? I mean you are essentially telling the transmission when to shift, and not letting the tranny shift where it was pre-programmed. Granted, our trannies aren't the best, but I'm pretty sure we would all like them to last as long as possible, right?
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Old June 10th, 2004, 03:22 AM   #19
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Quote:
Originally posted by VietGuy03 on April 18th, 2004 at 09:06 PM

Plum, if you do that "Shifting into D4 when you go over 40-45 mph" is that bad for the transmission? I mean you are essentially telling the transmission when to shift, and not letting the tranny shift where it was pre-programmed. Granted, our trannies aren't the best, but I'm pretty sure we would all like them to last as long as possible, right?
No, there is no difference if you maually do it or if the transmission does it automatically. Constantly manually downshifting to D3 and upshifting to D4 all day long isn't good for the tranny (over an extended length of time) but holding it in D3 from a stop wouldn't hurt it.



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Old June 10th, 2004, 07:23 AM   #20
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both

I drive through my gears a lot and always have. I miss manual trannies, but since it's not offered in the sedan I have no choice.

When around town/burbs I usually keep it in D3 until the rpms climb above 3500 or so, then I shift. I find myself shifting into D3 manually when passing or making a move in traffic. It's just easier to prepare for the move in D3 than waiting until the time is there and punching it. I can also keep it in gears longer than the computer often will.

I tend to start off the line slower and manually keep it in 1st, but then like to rush into second if I"m having fun. Too many nuts around here run red lights and crap to warrant jumping off the line. Besides...the Accord doesn't jump at all, so why try

Shifting manually allows more control IMO and won't hurt the tranny or car in anyway. You may wear out the shift plate or as in the case of my 02 Trailblazer, the wire that controlled the brake lock but I delt with that.
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Old June 10th, 2004, 08:02 PM   #21
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Re: both

Quote:
Originally posted by pdqgp
Shifting manually allows more control IMO and won't hurt the tranny or car in anyway.
Agreed. I use D3 around town for the most part, and D5 on the highway. Won't hurt a thing.
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Old June 11th, 2004, 01:21 AM   #22
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interesting.... maybe ill try using D3 when gas price goes down a bit. hahah
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Old June 11th, 2004, 05:27 AM   #23
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Mackdaddy...what exhaust?

are you running stock or aftermarket exhaust?
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Old June 11th, 2004, 05:31 AM   #24
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Re: Mackdaddy...what exhaust?

Quote:
Originally posted by pdqgp
are you running stock or aftermarket exhaust?
Still stock. I tried the Magnaflow catback (for 1 day.) It looked fantastic, but had the "drone from hell" between 2k-3k RPM. I'm still trying to find the perfect "tone."
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Old June 11th, 2004, 11:06 AM   #25
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Re: Re: Mackdaddy...what exhaust?

Quote:
Originally posted by Mackdaddy
Still stock. I tried the Magnaflow catback (for 1 day.) It looked fantastic, but had the "drone from hell" between 2k-3k RPM. I'm still trying to find the perfect "tone."
Me too. Never did find one I liked for my Trailblazer. I-6's....especially that one, are loud as heck!
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Old June 11th, 2004, 12:00 PM   #26
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Quote:
Originally posted by Plumaccordcoupe
IMO, I would never drive around town in D3. It burns more gas and puts more stress (mostly more heat) on the transmission. I never hear of people driving around in 3rd gear around town with a M/T so why do it in an automatic?
I always drove around town in D3 in my Accord. The constant shifting back and forth between 4th and 3rd was annoying, 4th gear has zero pep anyways, and on top of that all of the shifting is what overheats and wears out the clutch packs and overheats the tranny. Just holding 3rd doesn't do that. It's nice and flat in Florida, but up here in the hills 4th is a joke.

I drive around town in 3rd gear in the Maxima too (M/T) when I'm going through the red light district.

The Highlander has plenty o torque thanks to VVT-i, the variable intake manifold, and short gearing, so no need to lock out 4th in that around town.
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Old June 11th, 2004, 04:23 PM   #27
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Quote:
Originally posted by SteVTEC on June 11th, 2004 at 02:00 PM

I always drove around town in D3 in my Accord. The constant shifting back and forth between 4th and 3rd was annoying, 4th gear has zero pep anyways, and on top of that all of the shifting is what overheats and wears out the clutch packs and overheats the tranny. Just holding 3rd doesn't do that. It's nice and flat in Florida, but up here in the hills 4th is a joke.
No wonder you got such bad gas mileage in your Accord . Yes, Florida is nice and flat most of the time so driving in D4 isn't a problem. Some of our highways have steep slopes but that’s about it . Driving in D3 around town sometimes is fun though .



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