Speeding with OD OFF - Toyota Nation Forum : Toyota Car and Truck Forums

Threeacess3 · 10-19-2007, 04:48 PM

Going 75 mph with with OD off does it hurt the engine? I notice when I go this speed the engine rev 4200Rpm . When i have OD on the engine at 75 mph is 3100 rpm .

xtremeskier97 · 10-19-2007, 04:53 PM

You dont get as good of gas mileage if you do that and the engine probably wont last as long as it would using OD.

Threeacess3 · 10-19-2007, 04:56 PM

Your saying OD is bad for the engine why? I should leave it off all together than put the pwr button on .

CamrySExxx · 10-19-2007, 05:01 PM

reread what he said. With the OD off you will get bad gas milage. AND the engine probably wont last as long as it would if OD were on

xtremeskier97 · 10-19-2007, 05:03 PM

No...i was saying your are not going to get as good of gas mileage if you leave it off...and the engine will run at a higher RPM with it on, so it will wear parts faster, thus, shortening the life of the engine.

Simple: OD ON is better.

**EDIT**

He posted the explanation before me.

Thank you!

eddie926 · 10-19-2007, 05:39 PM

Can't think of any good reason to be cruising at high speeds with OD off.

On the other hand, if I'm cruising at high speed and need to slow down quickly because I'm coming up on a traffic jam or something, I'll shut OD off to get some engine braking to help with the slow down.

When you want to do some sporty driving around town or on the back roads, then you want to go PWR on, OD off. And of course, for those stop light to stop light moments, make sure you hit the turbo button on the dash.

That's what I jokingly call the button that you turn your A/C off with. Turning AC off is good for a little additional "boost"

But for cruising. PWR off, OD on. Better gas mileage, better top end at lower rpm. Less engine wear. Less engine noise...

Threeacess3 · 10-19-2007, 05:52 PM

Is Od off and Pwr on good for crusing in stop and go traffic at 45 mph.

eddie926 · 10-19-2007, 06:11 PM

Quote:

Originally Posted by Threeacess3

Is Od off and Pwr on good for crusing in stop and go traffic at 45 mph.

I like OD off a lot of times in stop and go. Again, it keeps you from shifting into 4th so you get 3rd gear engine braking for the stop part and you don't have to downshift from 4th for the go part. In really bad slower stop and go I'll run in 2nd gear sometimes so I don't have to keep going back and forth between the brakes and the gas.

As far as PWR on, I use it whenever I want better acceleration like around town stop light to stop light kind of driving. I don't use it all the time around town. Just when I want more power. Sometimes I'm taking it easy and want the better gas mileage with PWR off, other times I'm feeling "frisky" (however frisky you can feel in a NA camry

) so PWR on.

Just experiment to see what works best for you, and just know there's always a tradeoff between better power and better gas mileage.

Again though, can't think of any benefit to OD off or PWR on at highway cruising speeds.

blackhawk · 10-19-2007, 06:14 PM

dont mean to thread jack but if is it the same for manual cars after a auto to manual swap !!!

MIC0417 · 10-19-2007, 06:43 PM

no, OD is a extra little gear in the AUTO tranny, if you press it and have a manual it won't do anything because there is nothing for it to do. If you cruise OD on is what you want, for your best possible acceleration you want it off, its very simple, it just shifts higher in the powerband, ok

CamrySExxx · 10-19-2007, 06:45 PM

Quote:

Originally Posted by MIC0417

no, OD is a extra little gear in the AUTO tranny, if you press it and have a manual it won't do anything because there is nothing for it to do. If you cruise OD on is what you want, for your best possible acceleration you want it off, its very simple, it just shifts higher in the powerband, ok

im not exactly sure but it wouldnt matter if it was on or off if you were to accelerate from a dead stop would it. Since your car has to eventually go through all teh gears before going high enough to even matter if the od is on or off.

Black95Cam · 10-19-2007, 07:13 PM

pretty much what everyone is saying is correct . here is what the owner manual states..

"Always turn the overdrive switch one for better fuel economy and quieter driving, If the engine coolant temperature is low, the transmission will not shift into overdrive gear even with the overdrive switch on. If the transmission is repeatedly up shifted and down shifted between the third gear and overdrive when climbing gentle slope (or in stop an go traffic), the overdrive switch should be turned off. Be sure to turn the switch on immediately afterward."

"For ordinary driving, Toyota Recommends using the NORM mode to improve fuel economy"

eddie926 · 10-19-2007, 07:19 PM

Quote:

Originally Posted by CamrySExxx

im not exactly sure but it wouldnt matter if it was on or off if you were to accelerate from a dead stop would it. Since your car has to eventually go through all teh gears before going high enough to even matter if the od is on or off.

OD has no effect on low end acceleration. OD simply enables/disables your overdrive gear. If it's off, your Xmission just won't shift into OD.

The PWR button is what effects your shift points, and therefore your acceleration. PWR on = shifts at higher RPM for better acceleration. PWR off = shifts at lower RPM for better gas mileage.

As a side note, you'll also get "smoother" shifts with PWR off, which can make the Camry seem more luxurious or whatever you want to call it compared to similar cars that don't have the Camry's transmission. When I bought my '95 I4 LE in '95, I was shopping it against a '95 I4 Accord. One of the things that sold me on the Camry that year was how smooth it's engine/transmission was compared to the same year Accord. The Accord, as nice as it was, seemed almost tinny by comparison because it's transmission wasn't as smooth.

94CoupeV6 · 10-19-2007, 08:24 PM

^ He summed it up pretty well. The PWR button does NOT add power, it just changes when the car shifts.

Personally, I always have the PWR button on. Been off once to see what it was like. O/D is usually off as well unless I'm going over 45mph.

Quicksilver300 · 10-19-2007, 10:32 PM

however the accords motor is more than slightly better than the camry's. I've owned an accord just as long as I've own this camry......4yrs.........100,000mi. My 91' accord did 0-60 in 6.8, where as this camry, does about 11.1(both autos). And it sounded way more refined, I never questioned revving the honda up to 6k or more, it was like music. The camry sounds like it'll explode.