722.9 Auto Gearbox issue *Juddering*

[allybassman]

I'm surprised that didn't generate a fault code. When it's fixed it would be interesting to see if it was contributing to your judder.

I'd have thought that too, I'm dissapointed I did not spot it earlier either although in my defence i've only had the car two years and the hole is on the underside of the batwing, so not noticeable straight away.

It will be interesting, I doubt it will as my belief is something gearbox/TC related. Happy to be proven wrong though having spent £1000 in the last few days already on a new batwing + service items!

 

[allybassman]

Replaced the batwing today with a brand new OEM part from Mercedes, included were new orange seals for Turbo, PCV and Air filters. While I was at it I replaced the air filters and fuel filter (pig of a job - who decided to add a stick out part of top intercooler pipe that goes right over the fuel filter!?!)

Anyway, took it for a drive and it was very well behaved, I did 15 miles over diffrent conditions, tried to get it to judder but I couldnt! I still need to drop the oil so will take it on another drive tomorrow or over the weekend to get it warmed up... fingers crossed!
Every journey recently has had the car acting up, so either it was air intake related, or it's playing a sick joke on me and leading me down a narrow path of dissapointment later.

 

[Jason63]

Good luck. An air leak, just like a misbehaving EGR can cause all sorts of weird problems. Hopefully you've fixed it.

 

[allybassman]

Plenty more trouble free miles - Garage booking cancelled.

Thanks everyone for your replies/advice/ideas

GAD remap fund depleted, but atleast I have a car that is actually enjoyable/consistent to drive again!

Alasdair

 

[Jason63]

Brilliant - thanks for closing out the thread. So ultimately it was an air leak causing poor running and it was most noticeable when the gearbox torque converter locked.

 

[bembo449]

Glad you updated the thread pal , enjoy your new found smoothness

 

[allybassman]

Brilliant - thanks for closing out the thread. So ultimately it was an air leak causing poor running and it was most noticeable when the gearbox torque converter locked.

I would agree, only poor running when under very light load which coincided with TC lockup.

Looking back it all makes sense, the issue would 'go away' for a while... during winter / colder days. I was so convinced it was a Gearbox issue!

 

[bembo449]

One of my customers batwing was in a hell of a state , it just dumped oil all over the port shut off motor but never missed a beat otherwise , cars can be strange

 

[allybassman]

One of my customers batwing was in a hell of a state , it just dumped oil all over the port shut off motor but never missed a beat otherwise , cars can be strange

They really can! Wierdest thing is, no faults were logged and when scanned with STAR no meaningful codes were found by the garage..

I guess my Car is like one of those people who you can tell is clearly in a mood but when you ask them they say "i'm fine"

 

[John Laidlaw]

Good to hear a resolve- now enjoy!