c43 Gearbox Problems - Locking Out / Slipping

[Hughinafrica]

Hi there,

yesterday my gearbox started playing up with the following problems:

1. When I pulled away from a roundabout the box jammed in second gear. When I accelerated it would not change up and I could not over-ride it with the tiptronic. I had to pull over, switch the engine off and restart and it seemed fine.

2. Then later on on the same journey i was overtaking. When the box went to kick down out of 5th, it went into neutral and jammed and again I could not over-ride or select any gear with the tiptronic, so had to freewheel to a standstill at the side of the road, switch off the engine and start again. This happened again later on the same journey.

I had the gearbox oil changed less than a year ago and have never had any other probs with the gearbox.

Any thoughts as to what the cause of this could be? Thanks in advance.

 

[Alps]

always start with checking the oil level before going into expensive diagnostics.

 

[c43]

I would agree - get the oil level checked. My C43 gearbox used to odd things and it turned out to be oil levels. Always got it topped up once a year regardless and all my problems went away...

 

[Hughinafrica]

Thanks for that - I have booked it in to be checked out however that isn't for another 2 weeks.

 

[vijilants]

Hi there,

yesterday my gearbox started playing up with the following problems:

1. When I pulled away from a roundabout the box jammed in second gear. When I accelerated it would not change up and I could not over-ride it with the tiptronic. I had to pull over, switch the engine off and restart and it seemed fine.

2. Then later on on the same journey i was overtaking. When the box went to kick down out of 5th, it went into neutral and jammed and again I could not over-ride or select any gear with the tiptronic, so had to freewheel to a standstill at the side of the road, switch off the engine and start again. This happened again later on the same journey.

I had the gearbox oil changed less than a year ago and have never had any other probs with the gearbox.

Any thoughts as to what the cause of this could be? Thanks in advance.

Sounds like a possible controller plate issue. I'd get the error codes read.

 

[vtwin]

My C43 gearbox can behave as if its not engaged if i accelerate hard at about 5-10mph and then suddenly it engages and the car launches itself down the road. Its like its between 1st & 2nd. My g/b oil was changed less than 5000 miles ago at MB World. I would love to cure this as the most fun can be had from nailing the gas at 5-10mph Sometimes I catch it right for a perfect takeoff, usually when the cars warmed up.

Would a software upgrade help this problem?

 

[Adam230K]

My C43 gearbox can behave as if its not engaged if i accelerate hard at about 5-10mph and then suddenly it engages and the car launches itself down the road. Its like its between 1st & 2nd. My g/b oil was changed less than 5000 miles ago at MB World. I would love to cure this as the most fun can be had from nailing the gas at 5-10mph Sometimes I catch it right for a perfect takeoff, usually when the cars warmed up.

Would a software upgrade help this problem?

Maybe thats a clutch?

 

[miro]

Put the selectopr in D on the console,

Uncouple the linkage underside of the selector

Put the gearbox in D by hand

And then see if the linkage has drifted so that it needs adjusted.


Sounds like a linkage position problem and one which is done according to the mentioned steps.

 

[lynall]

There was a post a while ago, iirc was howards 430 with gearbox probs and turned out to be engine mounts, think blackc55 sorted it.



Lynall