Recent Topics
Milwaukee 2485-20 M12 1/4” Right Angle Die Grinder
by The Critic - 10/21/19 12:41 AM
Group 78 Battery Connector Issues
by Falcon_LS - 10/21/19 12:37 AM
Factors that can affect warming up time
by SlavaB - 10/20/19 11:59 PM
A nokian lineup review
by UG_Passat - 10/20/19 11:19 PM
Dealer Oil Change
by HowAboutThis - 10/20/19 10:35 PM
small qty of automitive paint
by danez_yoda - 10/20/19 09:36 PM
2017 Chevy Cruze recommended oil filter
by Electromotive - 10/20/19 09:13 PM
4L80E to Allison filter conversion
by P10crew - 10/20/19 09:03 PM
Pickles and gardenia
by 53' Stude - 10/20/19 09:00 PM
Weird Electrical Problems Due To Bad Ground.
by RayCJ - 10/20/19 08:59 PM
ECOGARD X 4610 CUT OPEN
by 53' Stude - 10/20/19 08:23 PM
FRAM ULTRA 7317 CUT OPEN
by 53' Stude - 10/20/19 08:17 PM
Easy to use free video editor
by Rat407 - 10/20/19 08:11 PM
Best budget tire for 2006 Nissan Pathfinder SE
by Dogred08 - 10/20/19 07:51 PM
Latest on SSD, HDD and USB Drives?
by JHZR2 - 10/20/19 07:43 PM
Oxy Clean On Leather Seats...WoW
by Warstud - 10/20/19 07:22 PM
Winter street biking
by CourierDriver - 10/20/19 06:47 PM
Fram Ultra or Mobil 1 for Jeep JK?
by SkipCam - 10/20/19 06:42 PM
Supertech 5QT Cardboard Thingy
by Gebo - 10/20/19 06:36 PM
Newest Members
whizznbyu, Oildude, JDVW2019, Carlos40A, GeraldT
69624 Registered Users
Who's Online Now
53 registered members (carlprop, bubbatime, AdditiveOCD, bdcardinal, CharlieBauer, boulderdentist, 4 invisible), 997 guests, and 21 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics296,249
Posts5,094,189
Members69,624
Most Online3,532
Jul 30th, 2019
Donate to BITOG
Print Thread
Hop To
Page 1 of 2 1 2
O/D off on an Automatic & Manually Shifting #5208580 09/09/19 03:47 PM
Joined: Nov 2002
Posts: 32,285
B
buster Offline OP
OP Offline
B
Joined: Nov 2002
Posts: 32,285
On another auto forum, I was reading a post that talked about how it's good to turn overdrive off when driving locally. Is there any negative impact on a transmission when you turn O/D off? My thought is let the AT stay with O/D on and let it decide what gear to be in. I never really gave it much thought. I've only driven manuals the last 20 years. In a mountainous/hilly area or when towing I can see the need to turn it off, but not for city driving. Modern transmissions are fully computerized, so they are much smarter at deciding when to use overdrive than you or I.

This was one of the comments:

"I manually shift mine all the time, in 3rd for around-town and into 4th when running a bit faster but not quite able to open it up for full highway cruising. According to my AutoMeter trans temp guage, it does not appear to change anything at all temps-wise and I find the throttle response and smoothness to be greatly enhanced. My trans usually runs around 155 to 160 indicated unless crawling through town in hot weather with the AC on, like today, where it appeared that a movie or TV sequence was being filmed downtown Baltimore and traffic was diverted into a complete snarl. A total Charlie Foxtrot but temps still hovered around 195 to 200."


2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208649 09/09/19 05:27 PM
Joined: Aug 2008
Posts: 3,946
R
Reddy45 Offline
Offline
R
Joined: Aug 2008
Posts: 3,946
You could drive without OD indefinitely and you wouldn't hurt the transmission. Your gas mileage would plummet but everything would function.

On my Tacoma, I'll drive in "4" when I remember to (and within the city) because it is peppier, but I'm habitually sticking it in "D" because that's the default.

Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208665 09/09/19 05:46 PM
Joined: Nov 2018
Posts: 1,480
S
Skippy722 Offline
Offline
S
Joined: Nov 2018
Posts: 1,480
There won’t really be anything gained, and all you’ll lose is fuel economy. That being said, my 8 speed is very quick to drop out of one of it’s OD’s when needed, and won’t go into OD in sport mode.


2016 Chrysler 300S v6
2018 Dodge Grand Caravan GT

Slight Mopar obsession
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208677 09/09/19 06:13 PM
Joined: Nov 2002
Posts: 32,285
B
buster Offline OP
OP Offline
B
Joined: Nov 2002
Posts: 32,285
Agree, that's what I figured. I don't see the benefit.


2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208684 09/09/19 06:33 PM
Joined: Jan 2018
Posts: 381
R
red7404 Offline
Offline
R
Joined: Jan 2018
Posts: 381
i bought a nissan frontier last year 2016 model. 244 ci V6 261 HP. O.D in a 4,220 lb truck. 3.31 rear gear. checked mine at 0-60 in 7.2 sec. 1/4 @ 15.7 sec these numbers are very aprox. my point is in town in O / D it pulls very very good down to 30 mph. O / D is a 0.839 ratio. much better than i thought a 244 ci in a 4,220 lb truck would.

Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208774 09/09/19 08:46 PM
Joined: Jan 2008
Posts: 4,259
E
exranger06 Offline
Offline
E
Joined: Jan 2008
Posts: 4,259
If a car is geared poorly (too tall), the transmission might hunt gears and shift back and forth between OD and D a lot. That will create heat and put extra wear on the transmission. If you find the trans hunting a lot, turn off OD.


2006 Ford Ranger Sport
1992 Honda Accord EX
2013 Toyota Sienna XLE AWD
1994 Ford Bronco XLT (project)
2011 Cadillac Escalade ESV (wife's)
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208849 09/09/19 10:35 PM
Joined: Mar 2016
Posts: 535
N
ndfergy Offline
Offline
N
Joined: Mar 2016
Posts: 535
Driving within city limits often requires a lot of nuance with the accelerator to properly gap both the car ahead an adjacent to you. Selecting the appropriate gear gives you better response both on and off the throttle. When not driven aggressively, most cars today are programmed to get quickly into high gear to engage the lock up torque converter saving fuel.

Our Camry’s 6 speed auto’s accelerator pedal is real mushy in the 50-60ish Km/h range. Having it in S4 locking out the top 2 gears is much better. A simple tap to the right puts us back in normal drive when above those speeds.


2015 Toyota Yaris 5spd Manual
Summer: Mobil Super 1000 10w30
Winter: Mobil Super 1000 5w30
OEM Filter
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208851 09/09/19 10:36 PM
Joined: Nov 2008
Posts: 10,192
D
dishdude Online Content
Online Content
D
Joined: Nov 2008
Posts: 10,192
This is such a 1980's conversation! When I was a kid I remember my Mom asking if she should drive her Astro van in OD or D. lol


2018 Challenger SRT 392 PUP 0w-40 Wix 57899XP
2018 GTI M1 Euro 0w-40 Wix WL10024
2019 Tiguan
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208855 09/09/19 10:44 PM
Joined: Mar 2015
Posts: 6,962
B
bbhero Offline
Offline
B
Joined: Mar 2015
Posts: 6,962
Originally Posted by buster
Agree, that's what I figured. I don't see the benefit.



I disagree...

I had a Audi 2019 a5 whole traveling up north on vacation in Barryville NY...

That car was much better being driven in manual mode... Rpm in 5th gear going 63 mph was much better to drive. Enough power there if you needed it at 2300 rpm and when one pulled the foot completely off the gas pedal... Enough to slow the car down. Unlike it being in 7th gear and running 1200 to 1400 rpm and had was always hunting the lowest rpm it could find... Which is greatly annoying to me. I kept the car in 5th gear even cruising at 78 mph... And it was turning 3300 rpm. This was a 2.0 L turbo motor that was a 4 cylinder making almost 260 hp.


Nissan Altima 3.5 Coupe
Cam2 Dexos1 Gen 2 5w30 Wix 57356 Oil filter
"Treat your family like your friends and treat your friends like your family."
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208915 09/10/19 03:10 AM
Joined: Nov 2002
Posts: 32,285
B
buster Offline OP
OP Offline
B
Joined: Nov 2002
Posts: 32,285
Good point. I'd rather keep it in 3rd then turn O/D off if I'm driving around town. Speed limits are usually 25mph.


2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208919 09/10/19 03:28 AM
Joined: Jan 2016
Posts: 1,005
Duffyjr Offline
Offline
Joined: Jan 2016
Posts: 1,005
Granted I'm talking about my older 89 GMC here but when I asked my mech about it I told him it liked to shift into OD at 35ish mph and around town it was constantly shifting in and out of OD he said it would be best to run it in D around town. I don't shift it in to OD until the speed limit is a least 40. At 35 in OD it only runs about 1000 rpm and seemed like it was lugging.

Last edited by Duffyjr; 09/10/19 03:29 AM.

89 GMC Sierra Advanced 5w30/51036 Wix
08 Lucerne CX Advanced 5w30/1040 Gold
18 Toro Super Recycler VWB SAE 30
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208972 09/10/19 07:21 AM
Joined: Oct 2014
Posts: 14,158
C
CT8 Offline
Offline
C
Joined: Oct 2014
Posts: 14,158
If the trans is hunting between the gears turn it off otherwise it is an automatic.I am beginning the see that 90% of internet chat is B.S.


2015 F150 2.7
2018 F350 6.2
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208973 09/10/19 07:22 AM
Joined: Nov 2008
Posts: 14,660
S
supton Offline
Offline
S
Joined: Nov 2008
Posts: 14,660
Manuals used to say to take out of OD if hunting was observed. Maybe that was only back when 4AT's ruled the roost, but it was pretty commonly seen.

Both of my automatics manage to handle 1-3 for the most part just fine. 4 and up though are a different story. Around town I'd rather have a bit more rpm for responsiveness. My truck really can only handle 6th on the highway, or on really flat ground. It gets better mpg at 50mph in 5th than it does in 6th at 60mph and faster. But that darn thing is in a race to get into highest gear possible, then you really have to get on it to convince it otherwise--just way easier if I block the gears I didn't want to use anyhow.

It's probably all in the trans programming--and the user's acceptance thereof--as to if manually shifting an automatic is "required" or not.


2011 Toyota Camry, base, 2.5L/6MT, 193k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 155k, ours
1999 Toyota Camry LE, 2.2L/4AT, 214k, his
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5208986 09/10/19 07:32 AM
Joined: Nov 2002
Posts: 32,285
B
buster Offline OP
OP Offline
B
Joined: Nov 2002
Posts: 32,285
I keep mine in drive with O/D on all the time. If I’m going really slow I may just put it in 3rd.


2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
Re: O/D off on an Automatic & Manually Shifting [Re: buster] #5209003 09/10/19 07:53 AM
Joined: Mar 2017
Posts: 11,024
PimTac Offline
Offline
Joined: Mar 2017
Posts: 11,024
It’s always good to have options. In my case there are a couple of hills that are long and windy. Sport mode helps to keep the transmission in a lower gear especially when dealing with traffic. I also have the ability to manual shift.

Today’s transmissions shift up quickly so if you are in a stop and go scenario on the freeway where you get up to say 15mph and have to slow down, sometimes the transmission doesn’t follow. You can end up in fourth gear real quick and then try to accelerate from 10mph or thereabouts. Using Sport Mode helps.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
Page 1 of 2 1 2
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™