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dennishazard
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Jun 11, 2012, 8:30 AM
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easy question, this time
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i have a dodge durang with 140,000 miles , it's a 1998 i just want to know whats best for my truck ? do i drive it with the overdrive on or off ? thanks...........Dennis, milwaukee,wi
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Tom Greenleaf
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Jun 11, 2012, 8:34 AM
Post #2 of 14
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Re: easy question, this time
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If driving steady and it's not shifting into and out of overdrive use it. If you are right at speed and load where it's constantly jumping in and out of overdrive just don't use it for those times,
T
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Hammer Time
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Jun 11, 2012, 8:57 AM
Post #3 of 14
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Re: easy question, this time
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You leave it in overdrive all the time unless you are towing. The system is automatic.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
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Jun 11, 2012, 12:59 PM
Post #4 of 14
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Re: easy question, this time
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Disagree. When driving at certain speeds, especially with hills the trans goes nuts locking and unlocking which is why you have a choice to defeat that in most vehicles,
Tom
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Hammer Time
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Jun 11, 2012, 1:02 PM
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Re: easy question, this time
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It is simply a higher gear that the transmission will select when appropriate. The transmission will jump in and out of any gear if you linger around the shifting speed.
It's not used when towing because the trans will overheat under the load with no circulation.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Jun 11, 2012, 1:03 PM)
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Tom Greenleaf
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Jun 11, 2012, 1:38 PM
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Re: easy question, this time
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Still disagree - re-typed from actual operator's manual.......
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(OVERDRIVE) - This is the normal NORMAL DRIVING POSITION. As vehicle picks up speed, automatic upshifts from first to second and third gear will occur. The upshift to fourth gear does not occur until the vehicle approaches the desired higher cruising speed and the driver eases up on the accelerator pedal. The transmission automatically downshifts as speed decreases.
The overdrive gear is specifically geared for economy and is not appropriate for certain hilly terrain, or towing large trailers. If transmission shifts back and forth excessively between overdrive gear and third gear or overdrive gear fails to provide adequate hill climbing performance (especially when on speed control), shift into D (OVERDRIVE LOCKOUT). The shift lever {{some use a button not the shift selector-my comment}} can be moved from OVERDRIVE to LOCKOUT at at any vehicle speed.
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That's exacty what it says (complete with a factory typo) and have seen close to that in many manuals. Not exactly where I live but close by N+W of here there are hilly roads, speed limits of 40 and trans goes nuts up and down hills and can't figure out what gear to be in. Can't speak for every vehicle ever made but GM and Ford say this!
Tom
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Discretesignals
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Jun 11, 2012, 1:55 PM
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Re: easy question, this time
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I can see going up hilly terrain you don't want it stuck up in 4th. 4th usually has the weakest clutches, esp. GM Hydramatics.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 11, 2012, 1:57 PM)
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Tom Greenleaf
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Jun 11, 2012, 2:28 PM
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Re: easy question, this time
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I don't want to badger this. A real hill is a load not unlike pulling a trailer. Plenty or most folks don't have to deal with that. In US most Interstate highways even in mountains chose the least grade possible and near impossible in some areas. Prior to lock up torque converts was a variable pitch one - I think high end GM cars and don't know how long that trick lasted but the RPMs could vary some in same gear at a given speed on purpose essentially changing the pitch of the engine side stator in converter. Must not have been practical for some reason as that idea didn't last?
Constant towing should be a special ordered with extra trans and even engine oil coolers, lower rear end ratios and more,
Tom
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Hammer Time
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Jun 11, 2012, 3:31 PM
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Re: easy question, this time
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Long hill, tow a trailer..................... same thing.
This is the point I was making
(OVERDRIVE) - This is the normal NORMAL DRIVING POSITION. As vehicle picks up speed, automatic upshifts from first to second and third gear will occur. The upshift to fourth gear does not occur until the vehicle approaches the desired higher cruising speed and the driver eases up on the accelerator pedal. The transmission automatically downshifts as speed decreases.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
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Jun 11, 2012, 5:06 PM
Post #10 of 14
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Re: easy question, this time
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I guess the issue is what is normal? Not stats but for perhaps 95% of people they wouldn't have any issue just using the OD gear or OD enabled and let trans do it's thing and it does when all is steady.
Traffic on roller coaster roads going at about the lock up speed in a line of traffic it's just annoying.
Fav trans was the C-6 coupled to enough HP and torque it didn't need to shift much unless your were wailing on the things but they were gas hogs,
Tom
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Discretesignals
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Jun 11, 2012, 5:36 PM
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Re: easy question, this time
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E4OD and 4R100 is a C-6 with overdrive. You need one of those Tom.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 11, 2012, 5:37 PM)
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Tom Greenleaf
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Jun 12, 2012, 1:10 AM
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Re: easy question, this time
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This was the best drivetrain ever. 4F4 = four foot drive for both propulsion and braking in one!
Oh boy!
Tom
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Discretesignals
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Jun 12, 2012, 4:50 AM
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Re: easy question, this time
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I wonder how many times Fred or Barney got their feet caught up in the back wheel?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Tom Greenleaf
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Jun 12, 2012, 6:40 AM
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Re: easy question, this time
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I just called Mr. Magoo - they were all friends and he didn't recall any mishaps!
Am I siily enough now?
Tom
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