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overdrive?

6.8K views 49 replies 22 participants last post by  kwg2371  
#1 ·
i searched and searched but can't find a good answer for my question. my question is, what is overdrive? How does it work? Does it work? Your answers are well apreciated, thank you
Ryan
 
#4 ·
Oh my.

Overdrive is 4th gear in our cars. It refers to the transmission output spinning faster than the engine. It helps with fuel economy while at highway speeds.

All modern cars have at least one overdrive gear. In our case it just refers to the highest gear, and the ability to shut it off and keep the transmission in 3rd.
 
#8 ·
DSMscreamer said:
Limited vocabulary, eh? Google it.
Why do you have to be a jackass huh? Its not a damn english class where you have to correct people on every little mistake, and hey the word "eh" is not really a word so get your shit straight before criticizing others on their vocabulary while your vocabulary isn't all that Mr. Jackass..
 
#9 ·
daonlyillwiz said:
Why do you have to be a jackass huh? Its not a damn english class where you have to correct people on every little mistake, and hey the word "eh" is not really a word so get your shit straight before criticizing others on their vocabulary while your vocabulary isn't all that Mr. Jackass..
A: "eh" is in the encyclopedia with a full explanation of its meaning and usage. I used it appropriately. B: I was merely trying to help the guy use proper English which most people on the forum appreciate. C: I wasn't talking to you little cretin. So, C’ya! (Maybe you can grasp that intention.)
 
#10 ·
Ok i got a question also, Are you supposed to drive with over drive on or off??? what gives better gas mileage??
 
#11 ·
Overdrive "on" will give better fuel economy. Just imagine having a manual tranny with 4 gears. If you were cruising on the highway would you leave it in 3rd? Of course not. Shifting to 4th will drop rpms conserving fuel. You could consider 5th gear overdrive in a 5-speed manual.
 
#12 ·
Thanks you answered my question and saved me alot of money lol.
 
#13 ·
DSMscreamer said:
Overdrive "on" will give better fuel economy. Just imagine having a manual tranny with 4 gears. If you were cruising on the highway would you leave it in 3rd? Of course not. Shifting to 4th will drop rpms conserving fuel. You could consider 5th gear overdrive in a 5-speed manual.

Aside from wasting gas your engine will be turning way too fast (high rpms) which is not good for the motor at all -- you'll burn the damn thing out and then complain how dsm's are pos's.


In case someone missed it -- O/D IS 4th GEAR -- and our cars are 4-spd autos so don't be confused because there is an o/d button which is simply a nice feature for those times you may want/need to hold 3rd gear and prevent it from upshifting -or- when you want to downshift to 3rd without throttle shifting.

People seem to get so thrown off because we have a button that reads 'od' -- for those of you that just can't get past the o/d thing I'd say paint a little '4' on that button.

OP: Try searching a little harder the next time because this subject has been discussed many times before.
 
#14 ·
The car will not burn out with o/d off unless your driving like 80 mph. At 55 you will be turning like 3500 rpm and if your engine can't take that then time for a rebuild anyway. Mine took it with 200k miles on the engine with no ill effects. Now gas milage goes in the toilet with out o/d. I ran mine for like a year without o/d on the intersate at 65 mph turned around 4300 rpm. Gas milage was around 16 to 19 mpg.
 
#15 ·
Gs dewd said:
The car will not burn out with o/d off unless your driving like 80 mph. At 55 you will be turning like 3500 rpm and if your engine can't take that then time for a rebuild anyway. Mine took it with 200k miles on the engine with no ill effects. Now gas milage goes in the toilet with out o/d. I ran mine for like a year without o/d on the intersate at 65 mph turned around 4300 rpm. Gas milage was around 16 to 19 mpg.

My car turns 3500 rpm at 80 mph and I only feel comfortable driving it like that for a few miles at a time before bringing the rpms down to what I'd consider a more reasonable range. At those rpms my gas gauge sinks like a stone anyways and after 5 mi or so I would basically want to cry as the fuel disapears at a terrible rate. AND I'd NEVER continuuously run my car or any car at 4300 rpm UNLESS I was looking to prematurely end its life so I really don't get what the point of doing that is. I wouldn't even have to look at the tach to know that the engine is turning too fast, i'd haer and feel it and intuitively know that its too fast and would want to shift to 4th. If my 4th gear wasn't working I would maybe drive 3500 rpm but even then I'd be uncomfortable doing so. If you're talking about a brand new car then maybe those high rpms are ok but I bought my 91 TSI in '97 with 67,000 mi so it was far from brand new and I wasn't looking to drive it with the attitude "yeah well the motor can take it", perhaps, perhaps not. My thinking was 1) it's a DSM 2) an older DSM 3) engine rebuilds are not cheap and require a lot of down time 4) don't need the headaches.

Why would anyone want to cruise down the highway in 3rd gear anyway? If I was cruising at 50-55mph and wanted to get in 3rd gear for a wot run I just click the od button or throttle shift depending on mood.
 
#16 ·
91-Bluebird said:
My car turns 3500 rpm at 80 mph and I only feel comfortable driving it like that for a few miles at a time before bringing the rpms down to what I'd consider a more reasonable range. At those rpms my gas gauge sinks like a stone anyways and after 5 mi or so I would basically want to cry as the fuel disapears at a terrible rate. AND I'd NEVER continuuously run my car or any car at 4300 rpm UNLESS I was looking to prematurely end its life so I really don't get what the point of doing that is. I wouldn't even have to look at the tach to know that the engine is turning too fast, i'd haer and feel it and intuitively know that its too fast and would want to shift to 4th. If my 4th gear wasn't working I would maybe drive 3500 rpm but even then I'd be uncomfortable doing so. If you're talking about a brand new car then maybe those high rpms are ok but I bought my 91 TSI in '97 with 67,000 mi so it was far from brand new and I wasn't looking to drive it with the attitude "yeah well the motor can take it", perhaps, perhaps not. My thinking was 1) it's a DSM 2) an older DSM 3) engine rebuilds are not cheap and require a lot of down time 4) don't need the headaches.

Why would anyone want to cruise down the highway in 3rd gear anyway? If I was cruising at 50-55mph and wanted to get in 3rd gear for a wot run I just click the od button or throttle shift depending on mood.
You need to sell your DSM or grow some balls. These motors will take an amazing amount of abuse, cruising at 4500 rpm ain't shit. How about roadracing an internally stock motor for over an hour with revs near redline almost the whole time. That's what these motors are built for.
 
#17 ·
DSMscreamer said:
You need to sell your DSM or grow some balls. These motors will take an amazing amount of abuse, cruising at 4500 rpm ain't shit. How about roadracing an internally stock motor for over an hour with revs near redline almost the whole time. That's what these motors are built for.

What I'm saying is why would anyone want to cruise down the highway CONTINUOUSLY in anytHing but top gear? Why put the motor under undo stress and waste gas? In what DD situation would I even want to drive at 4500 rpm when I can be at 3000 instead? We weren't discussing a race situation either but rather everday driving.
 
#18 ·
DSMscreamer said:
You need to sell your DSM or grow some balls. These motors will take an amazing amount of abuse, cruising at 4500 rpm ain't shit. How about roadracing an internally stock motor for over an hour with revs near redline almost the whole time. That's what these motors are built for.
I TOTALLY second that!!!

If you want to drive like a GRANNY, then sell the DSM to someone worthy of driving it, and go get youself a Mini-Van...

These cars Love to rev!!!

They're built to run! Not haul Groceries & Grandma's...
 
#19 ·
Arctic_GST said:
I TOTALLY second that!!!

If you want to drive like a GRANNY, then sell the DSM to someone worthy of driving it, and go get youself a Mini-Van...

These cars Love to rev!!!

They're built to run! Not haul Groceries & Grandma's...

Totally agree that Turbo DSMs are meant to be driven and mine got driven hard everyday BUT i never drove around in the wrong gear either SO please explain why I'd want to drive down the highway at 60+ mph in 3rd gear with the engine screaming when I can let it shift to 4th?
 
#20 ·
You say you get uncomfortable runnin at 80 mph for any length of time. That's kind of anal... Hell, it,s 382 miles from my house, to where my son lives.I drive my GST there on a regular basis. (Couple times a month) When I hit the Interstate, the cruise control never comes below 80 mph, and were talking a 6 hour drive. It doesn't run hot, and I do this on 1 1/2 tanks of gas...

These cars have No-Problem running hard, and 3800 rpm's for them is not remotely stressful...
 
#21 · (Edited)
Arctic_GST said:
You say you get uncomfortable runnin at 80 mph for any length of time. That's kind of anal... Hell, it,s 382 miles from my house, to where my son lives.I drive my GST there on a regular basis. (Couple times a month) When I hit the Interstate, the cruise control never comes below 80 mph, and were talking a 6 hour drive. It doesn't run hot, and I do this on 1 1/2 tanks of gas...

These cars have No-Problem running hard, and 3800 rpm's for them is not remotely stressful...

Your '97 GST has a lock-up TQ so at 80 mph you're not running 3500 rpm you're running closer to 3100 which I'd have no problem running all day long either.

On a 100,000+ mi motor without a logger or gauges I wouldn't be that comfortable runnnig a steady 3500 rpm/80 mph but that's just me. I guess part of it has to do with how fast that gas gauge drops at a steady 3500 rpm and on long trips I like to baby the engine a bit anyways.

I guess everybody has their own ideas on what is hard on a car and what is not. On the one extreme is the guy who only drives his car like grandma and on the other is the guy who beats the crap out of it constantly but most of us no doubt fall somewhere in between those extremes as we all have our own subjective opinions on what it means to drive the car hard versus abusing it and most of us will wind up driving so accordingly.
 
#22 ·
My GST is a 5 spd, my 96 talon is an Auto... But regardless 3100 rpm's on a 100k mi. motor is nothing... People take 100k motors to 400+ hp every day, with NO INTERNAL MODS whatsoever... DSM's are not quite the POS's you seen to think... They love to rev!!!

But hey, It's all cool... I just like to drive faster than you do...

Don't Sweat the Small Shit!!! And 3100 rpm's on a 100k DSM, is VERY SMALL SHIT!!!

Have a Nice Day!!!
 
#23 ·
Arctic_GST said:
My GST is a 5 spd, my 96 talon is an Auto... But regardless 3100 rpm's on a 100k mi. motor is nothing... People take 100k motors to 400+ hp every day, with NO INTERNAL MODS whatsoever... DSM's are not quite the POS's you seen to think... They love to rev!!!

WHOA THERE BUDDY!! READ BEFORE SPOUTING OFF:mad:

I did not say DSM's are POS's and I've been driving them for over 10 years now!

I SAID I have no problem driving 3100 rpm all day long. I said driving long distances at 3500 rpm makes me a little uncomfortable and I said I don't see the purpose AND wouldn't drive at 4300 or 4500 rpms going down the highway.

You are correct in that they do love to rev and I've made 100's of 1/8-1/4 mi runs going to redline on a stock high mileage motor. At the same time though I don't feel the need to do stupid shit like drive 60+ mph in 3rd gear but hey if you want to do that then go right ahead!


aRCTIC_GST said:
But hey, It's all cool... I just like to drive faster than you do...


Don't Sweat the Small Shit!!! And 3100 rpm's on a 100k DSM, is VERY SMALL SHIT!!!

Have a Nice Day!!!

Drivng faster!? The discussion is about RPMS not MPH. Do you even know the difference?


BTW, stop pm'ing me asking "WHAT MODS DO YOU HAVE". Mods have nothing to do with engine spped.

Have a Nice Day!!
 
#24 ·
Wow!!! Three things come to mind, Anal, Insecure, PARANOID!!!

Easy there buddy, don't blow a gasket.

As for Speed vs RPM's? Show me a car where RPM's do not increase with MPH... Or is that concept a little deep for such a feeble mind???

Sorry OP, don't mean to be hoarding your thread, just trying to get a point across to the little "BlueBirdie" everywhere I go and post, he follows and makes uneducated comments, that usually don't relate to the thread...

Sorry guys, Have a Great Day, and good Luck...
 
#26 · (Edited)
Arctic_GST said:
Wow!!! Three things come to mind, Anal, Insecure, PARANOID!!!

Easy there buddy, don't blow a gasket.

Sorry OP, don't mean to be hoarding your thread, just trying to get a point across to the little "BlueBirdie" everywhere I go and post, he follows and makes uneducated comments, that usually don't relate to the thread...

LMAO!!! I'm following you everywhere you go and making uneducated comments?? Who's paranoid and insecure :confused::confused: