Auto gearbox slightly backward when in "D"

[CHB]

guys, sorry for the title as i don't know how to describe it in short hehe...

i just purchased a Toyota RAV4 SXA-11. it has 3SGE-BEAMS version and its mated with automatic gearbox.
when it on a slightly slope road, it tends to go backward even the gearbox in "D". this never happens to my other automatic geared vehicle. how can i rectify this problem?

[RA35GT]

Dood, this happens in some cars. (The new commodores do it for example).

Nothing to worry bout, just gotta keep it in mind when on hills.

[Adash=P]

Handbrake

[V-Na]

Hill start?

[Z2TT]

Hi,

I'd imagine all automatics would do this to some extent, depending on the car and the hill.
Just use the brakes.

[woggin]

worn stallie??? not engaging enough at low rpms??

[CHB]

that is what i'm trying to find out mates. when i came to a stop at a slightly slope road (traffic stop), i have to step on the brake or apply slight throttle to keep the car static or else it will just moving backward, even the gearbox still in "D" and the engine idling nicely..

[Jt_70R]

in between your engine and automatic is basically a fluid coupling, ie. the two are not connected with an actual solid shaft. try doing some quick googling for 'torque converters' and 'fluid couplings' to get an idea. hard to explain the concept neatly (and shortly) here.

anyway, short story, what you describe is perfectly normal, the few extra RPMs you have to give your car balances out the torque on either side of the fluid coupling, hence keeping the vehicle stationary. perhaps you might need to bump up your idle speed a tad, if you find it that much of an issue?

[V-Na]

in between your engine and automatic is basically a fluid coupling, ie. the two are not connected with an actual solid shaft. try doing some quick googling for 'torque converters' and 'fluid couplings' to get an idea. hard to explain the concept neatly (and shortly) here.

anyway, short story, what you describe is perfectly normal, the few extra RPMs you have to give your car balances out the torque on either side of the fluid coupling, hence keeping the vehicle stationary. perhaps you might need to bump up your idle speed a tad, if you find it that much of an issue?

And if you don't mind using more petrol.

[DoctorDubb]

i have to step on the brake or apply slight throttle to keep the car static or else it will just moving backward

Last time i checked i thought this the point of having brakes?

Torque Converter from Google Images:

[greywolf]

Last time i checked i thought this the point of having brakes?

Torque Converter from Google Images:

Google images FTL, automatics don't use flywheels. I used to work in an Auto Trans shop, and the first time I used flywheel as the terminology I had my head bitten off. And for the life of me I can't recall what it's meant to be called !!!!

Drive plate maybe ???

[V-Na]

Howstuffworks FTL, automatics don't use flywheels. I used to work in an Auto Trans shop, and the first time I used flywheel as the terminology I had my head bitten off. And for the life of me I can't recall what it's meant to be called !!!!

Drive plate maybe ???

Fixed for you.

[DoctorDubb]

Ok so the terminology isnt the best, it was more to show the guy a rough idea. It was the first or second google image that came up just incase he was too lazy to search, back to my work now .

Cheers,
Steve

[Adash=P]

Flexplate?

[DX20VT]

Auto flywheel is called a flexiplate,


and have you checked the fluid level?

I dont believe it is normal unless the hill is pretty steep.

I drive customer cars every day so driving different stuff all the time,
and cant remember any normal auto's doing that.