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Posted by talontsiboy24, May 11, 2009
Automatic Tranny - 4G63 automatic tranny discussions. Sponsored by Import Performance Transmissions
i heard to always keep it on?
In drive the car is under load, so fluids temps may rise some, which won't help anything. If you're going to be sitting for any longer than a routine stoplight, just put it in neutral to take the load off.
yea thats what i thought. some lights take 2 damn long so i usually throw it in neutral.
As far as putting it up into neutral if sitting for a while, I do that all the time.
The REAL benifit of this is not to make the tranny last longer necessarily, but it CAN extend the tranny's life by extending the tranny FLUID life. When you are sitting with an auto car in gear and holding the brake pedal you are actually causing fluid shearing in the transmission fluid and this over time will break down the fluid and can cause the tranny to fail prematurely.
I heard if u keep switching it on and off its just gonna endup not working thats why people just leave it on? The manual says to keep it on all the time also.
You're listening to the wrong people. I would like to see where the manual says to keep it on all the time.
Well i didnt see it in the manual with my own eyes since i dont have mine just heard that but i do think pressing it off and on would not be a good thing to do cause speeds change around here from 30-55 so i just leave it on.
. I've asked more than one transmission technicians and they all recommend that you should keep the over drive on all the time unless your going uphill.
By the way I keep mine on all of the time and I haven't really had any problems either.
Did you ever know you can get engine braking with the o/d off? This can be handy for in town driving and can save your brakes by not using as much of them to stop. It can also help your transmission as I said before, by not having it hunting/shifting as much around town.
But whatever you choose to do... Good luck to all and their automatics.
This is one of those ridiculous questions that keep coming up all the time.
The overdrive is just the fourth gear and you wouldn't tell the MT guys not to use their 5th. OD is NOT some special function that kicks in at anytime like a turbo. An auto tranny is designed to to do all the work for you and you can go right ahead and leave the OD on ALL THE TIME if you want. In low speed city driving you will never get up to speed for OD anyway.
You do have the option of turning the OD off if you feel it is appropriate. When would you do this? Good times to do so would be for engine breaking down a hill, or for more power going up a long hill. Yes, even turn it off if you are on a highway and want better acceleration, but once up to speed switch it back on. Leaving the OD switch on during these occasions will not significantly affect your tranny. Keep in mind that you lose fuel economy if you keep the OD turned off on the highway.
For those who want a reference, the first line in the owner's manual for a 92 on page 56 states "During ordinary driving, the overdrive switch should be left in the pressed-in (ON) position." It then goes on to give the same examples that I did on when you may choose to turn it off.