My auto gearbox goes wrong

[Guest]

Guys, help me please.
It's the second day I start my car, then set gearbox lever into Drive position, it does a punch into the transmission, and sets 2nd gear.
It doesn't change to any other gears except 2nd and rear (i mean, 1-3-4-5), during 1-2 kilometers, doesn't matter if I rev it high or stop the car. It doesn't go neither up nor down.

After 1-2 kilometers it accidently changes to 3rd while the car goes faster, and after that everything works OK till the next morning.

No errors from gearbox ECU nor from main ECU.

Gearbox is filled up to level with fresh MMC DiaQueen SPIII month ago (2000 kms since then), and outer oil filter was changed at the same time.

Gearbox oil doesn't look burnt or overheated, it has a good smell and colour, without any small pieces in it.

What can it be? and what should I do?

 

[pu-11-me]

Cry.... Thats what i would at a time like this

Sounds like the trans oil is too cold actually.... As odd as they may sound. How cold is it there?

 

[Scottie]

Check the vacuum hose that runs from the engine to the gearbox. It might have popped off or split.

 

[Guest]

Cry.... Thats what i would at a time like this

That's not the way I do

Sounds like the trans oil is too cold actually.... As odd as they may sound. How cold is it there?

+10 celcius this morning.

Check the vacuum hose that runs from the engine to the gearbox. It might have popped off or split.

I'll watch the MMC ASA to check which vacuum hose is that.

 

[pu-11-me]

+10 celcius this morning.

Hmmmmm.... Not cold enough to make that happen

 

[Guest]

Check the vacuum hose that runs from the engine to the gearbox. It might have popped off or split.

Didn't find any vacuum hoses to gearbox in the ASA software. Will look for it under the hood.

 

[bradc]

Check the gearbox oil level is correct. Do you have any warning lights on the dash?

 

[Guest]

bradc, I already wrote:

No errors from gearbox ECU nor from main ECU.

That was read with a MUT-II scanner, and that also means that no warning lights on the dash are flashing.

Gearbox is filled up to level with fresh MMC DiaQueen SPIII month ago (2000 kms since then), and outer oil filter was changed at the same time.
Gearbox oil doesn't look burnt or overheated, it has a good smell and colour, without any small pieces in it.

That means the level is correct (at the middle of cold mark while cold, at the middle of hot mark while hot).

 

[Guest]

o.. i also had that problem
but once after i reset the ECU the next moring it works fine for 10 15 minutes and it stuck in 2nd, and reverse only
i still have no time to fix that, i was overseas but before i also change new oil and filter

before that happen, my car have TCL lights on and i was also thinking if the vaccum hose will make that happen too..

 

[bradc]

Possibly a sensor problem then

 

[Guest]

but the TCL lights gone now and i still got the problem...still fixing it

 

[Guest]

My needs more and more time to wake up and start working properly. It needs 5-6 km now..

 

[Guest]

i just have my box rebuild

good luck mate

 

[whiteleg]

Alexander I had a similar issue when my mechanic installed a new gearbox, it just got stuck in second gear. He simply replaced a sensor from my old box and it was all fine after that.

 

[Guest]

Alexander I had a similar issue when my mechanic installed a new gearbox, it just got stuck in second gear. He simply replaced a sensor from my old box and it was all fine after that.

Which sensor was that?