Sharing abt gearbox problem (Renault dpo box)

gunnerzz

2,000 RPM

gunnerzz

2,000 RPM
Jul 3, 2014
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Melaka
i want to share a problem i encojnter recently to add to our knowledge and who knows it might helps u guys one day.

I was driving one night when suddenly;
-gearbox jerk
-it seems to lock on 2nd gear
-gb check light on
-gear felt like slipping clutch in manual tranny(safe mode i guess)

what i tot;
-tcu needs to be retune(normal on euro electronic)
-one off error

i park at the roadside and restart.it worked before but not this time.now i am accepting the fact that something major is wrong in the gb.most probably a solenoid valve.i still make it home driving like a snail.that night i remove the tcu fuse to reset it after looking on my porch and see no atf leaks and drip on it.

next day a reinstall the fuse and the problem is still there.have a proper look under the hood and only then i discover the atf is leaking and its all over the left lower arm.fyi my gb does not have dipstick.i decided to call the tow truck and not drive it to workshop to prevent damage.well,not u less i have fried the auto box last night...

My regular mech drop the gb on the floor but decided to call gb specialist as the job require special tool.when completed they replaced 3 seal which are;
1.main seal(output shaft of the gb)
this is just a precautionary replacement.i agreed as removing the gb might caused some extra wear.
2.pump seal.its what they called it.
3.one more seal i cant remember.

what they said is that the gearbox itself is not leaking.with the seal kn the pump leaking,everytime i select a gear atf will be spilled and the system looses pressure.the tcu detect this and trigger safe mode which is why i cant go fast.

considering the mileage of my car (186k km) and the fact that keepi g om driving with the supposedly low atf level due to leak might caused the gb to spoilt..i was preparing to order a manual box from uk.

to my surprise...the gb survive and it feels just like before.
it still need a complete retune though as engine is not responsive enough.guess the safe mode really save the gb.
 

gunnerzz

2,000 RPM

gunnerzz

2,000 RPM
Thread starter
Jul 3, 2014
2,089
684
713
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Melaka
For those whom notice my other post, u will know that my 1.8 waja has been grounded for few month with GB problem again.
This time the GB checklight does not lit up together with the gear indicator.
When i select a gear, a loud knock will happen which shake the entire car.
The car can move but again...in safemode.

I decided to drive the BLM for a few month and only warm up the 1.8 engine.
Last week decided to send it for repair at German Garage Melaka branch.
They hook up their diagnostic tool but it cant connect to the ECU or TCU.
When it do connect it will only last for few second.
They gave up and i drove home in the annoying safemode.

I parked at the porch for half an hour before i need to move the car as my bro want to drive out his car.
My dad notice some oil spill under the car, i checked and confirm its ATF.
Nevertheless i start the engine to move the car and to my surprise the GB seems to be fixed.
Everything is back to normal.

I have been driving it everyday to work now, no problem.
I am grateful but still a bit confused...what actually went wrong?
 

gunnerzz

2,000 RPM

gunnerzz

2,000 RPM
Thread starter
Jul 3, 2014
2,089
684
713
36
Melaka
Your TCU wiring? Suddenly full contact again?
Maybe....
My bro bought a contact cleaner and just spray the ecu connector.
Next will spray the tcu connector as now i dont know how to remove it.
Looks complicated and really dont want to break the clip.

Wil monitor the outcome.
 

vr2turbo

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vr2turbo

Beyond 20,000 RPM!
Helmet Clan
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May 11, 2010
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Maybe....
My bro bought a contact cleaner and just spray the ecu connector.
Next will spray the tcu connector as now i dont know how to remove it.
Looks complicated and really dont want to break the clip.

Wil monitor the outcome.
In a way, can be also. My mechanic have a Citroen ZX, and that day he did mentioned had some problem with wiring. The plastic clips were brittle also. So he remove, spray contact cleaner into the connectors, plug back, then after that okay dy.....hahhahhahah