OD on or off?
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Veteran
Joined: Sep 2005
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From: Eastern MA
RE: OD on or off?
ORIGINAL: OldDodgeDriver
If most, say 50% to 75% of your driving is local city driving below 40 mph, you should turn it off. If most of your driving is highway above 45 mph, then it would be best to leave it on. Turning it off around town prevents the lockup converter from constantly engaging and disengaging, which causes wear. It has been my experience that using overdrive around town has very little impact on fuel economy.
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If most, say 50% to 75% of your driving is local city driving below 40 mph, you should turn it off. If most of your driving is highway above 45 mph, then it would be best to leave it on. Turning it off around town prevents the lockup converter from constantly engaging and disengaging, which causes wear. It has been my experience that using overdrive around town has very little impact on fuel economy.
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Good discussion fellas! This is what I wanted.
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Veteran
Joined: Sep 2005
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From: Eastern MA
RE: OD on or off?
ORIGINAL: f0x672
is it safe to turn OD off while the truck is moving or no?.... i was never sure
is it safe to turn OD off while the truck is moving or no?.... i was never sure
Joined: Jul 2006
Posts: 43
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From:
RE: OD on or off?
There are only a few instances where I turn it off, in this order:
1. Towing and the tranny starts hunting gears: LOCK IT OUT! It'll save your tranny.
2. For engine braking coming off a hill or coasting to a red light
3. I see a hill coming and need/want some gusto to get up the hill (and even then only sometimes, usually I'll just let the slushbox do its thing).
The O/D is there for a reason (fuel economy, less engine wear); leave it on unless you need to turn it off.
1. Towing and the tranny starts hunting gears: LOCK IT OUT! It'll save your tranny.
2. For engine braking coming off a hill or coasting to a red light
3. I see a hill coming and need/want some gusto to get up the hill (and even then only sometimes, usually I'll just let the slushbox do its thing).
The O/D is there for a reason (fuel economy, less engine wear); leave it on unless you need to turn it off.
RE: OD on or off?
ORIGINAL: Daksport1pa
More power going up and not having to ride the brake coming down.
More power going up and not having to ride the brake coming down.
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RE: OD on or off?
ORIGINAL: virused
i am assuming that everyone knows this, but i just want to be safe. overdrive (od) is not a way to gain power. overdrive is simply a 4th gear. going into it is just like shifting into a higher gear with a standard transmission. the reason there is an overdrive, other than to alllow your truck to go safely over 60 mph, is for better gas milage and highway travel. turning od off does not give you more power by any means, it just does not allow the transmission to be shifted into the highest gear.
ORIGINAL: Daksport1pa
More power going up and not having to ride the brake coming down.
More power going up and not having to ride the brake coming down.
Record Breaker
Joined: Jul 2005
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RE: OD on or off?
I know this. By saying more power going up hill I mean turning it off which leaves it in 3rd gear and not wanting to shift to 4th where the RPMs will drop.
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this whole subject is realy simple....50mph or below no od, unless your going the same speed on a level grade for a realy long time then it will save some fuel, also no od if ur towing at any speed
basicaly if you would not use 5th gear in a mt truck then dont use overdrive..
-travis
[/quote]
this whole subject is realy simple....50mph or below no od, unless your going the same speed on a level grade for a realy long time then it will save some fuel, also no od if ur towing at any speed
basicaly if you would not use 5th gear in a mt truck then dont use overdrive..
-travis
Champion
Joined: Dec 2003
Posts: 4,119
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From: Sycamore, Illinois (displaced to Arkansas)
RE: OD on or off?
stev98312, for the last few weeks, I've been doing the same thing (turning O/D off when I start the truck).
Mileage was not effected.
I'm now following the "only while going appx. 50MPH+" rule.
Mileage was not effected.
I'm now following the "only while going appx. 50MPH+" rule.