[Monger007]

I have a 320D 2010 E90 M Sport with the 6 speed auto box. The car has only covered 26k km

When I drive slowly I can feel a clunk when changing through the gears, it does not happen in every gear but it only appears at slow speed when driving in the town.

If I wind the car on the open road there is no issue.

[tom619]

I think I have the same issue bud.

On my commute to work 4-5 miles town traffic I feel a judder when the the box is up shifting around 2000rpm.

Soon as I take it through the gears on the motorway no problem at all.

[Monger007]

Originally Posted by tom619

I think I have the same issue bud.

On my commute to work 4-5 miles town traffic I feel a judder when the the box is up shifting around 2000rpm.

Soon as I take it through the gears on the motorway no problem at all.

With my car there is no judder, its just a single clunk sound when changing from one gear to another. I would have thought at 26k km the box would be very smooth and change through the gears with ease. This does not happen in every gear, and appears to be intermittent. My dealer is a long way from my location so I guess the system can be checked on the computer.

I was thinking if I had some pre- knowledge on the subject, I would compare this with what the dealer will tell me is wrong.

[old grey steve]

You need to get the car in the air check the underside of the gear box sump for oil sweating if there are signs of this then the cars lost some oil and will be scavenging for the required oil and certain times(which has been lost)

If you find this is the case then change the sump/oil and sleeve. Once done re set the gear box adaptations to zero and drive for around 50 miles which will create the desired re learn procedure to enable the gear box to acclimatise to fresh oil and oil quantity.

At a gu3ess I'd say the thump you're feeling/hearing is a lack of fluid/pressure required and suspect you'll find the answer on the underside of the trans oil sump as a sweating residue on the underside of the plastic sump and we've done loads here and once done and adaptations re set the issue largely never re occurs

[Monger007]

Originally Posted by old grey steve

You need to get the car in the air check the underside of the gear box sump for oil sweating if there are signs of this then the cars lost some oil and will be scavenging for the required oil and certain times(which has been lost)

If you find this is the case then change the sump/oil and sleeve. Once done re set the gear box adaptations to zero and drive for around 50 miles which will create the desired re learn procedure to enable the gear box to acclimatise to fresh oil and oil quantity.

At a gu3ess I'd say the thump you're feeling/hearing is a lack of fluid/pressure required and suspect you'll find the answer on the underside of the trans oil sump as a sweating residue on the underside of the plastic sump and we've done loads here and once done and adaptations re set the issue largely never re occurs

Steve many thanks for that info. When you mention a sweating would that reflect to some form of leak from the auto box sump area ?

On the location I park my car there is not a pin drop of oil visible on any area of the surface.

On my model of car I assume there is no way to check the auto box oil level as it has no dip stick, and I am unable to obtain any form of manual regarding this model in English at my location.

[old grey steve]

Originally Posted by Monger007

Steve many thanks for that info. When you mention a sweating would that reflect to some form of leak from the auto box sump area ?

On the location I park my car there is not a pin drop of oil visible on any area of the surface.

On my model of car I assume there is no way to check the auto box oil level as it has no dip stick, and I am unable to obtain any form of manual regarding this model in English at my location.

You sadly won't see any oil from the gearbox area(unless the leak was horrific)when we have the car in the air and inspect we see oil sitting in and around the finned plastic and around the off side rear of the plastic sump casing and the sleeve. Best/only suggestion I can give you is car in the air covers off and inspect, if moist then there's part if not all your problem.

So your sump will look like this from the underside



nice and clean as you can hopefully see the fins you see is where a lot of the oil from the transmission general tends to lurk



notice nearest to the front the darker colour(small amount of sweating fluid) dirt has from the road also "welded itself on to the escaped fluid" you'll also notie the odd dark wet patch on one or two of the fins from fresh trans fluid leakage. If you look at another sump below



you'll see its nice and shiny(this car lost over 2 litres of fluid). And if you drain the fluid and it comes out like this




trust me it needed to be changed as this stunk!!!!

[Monger007]

Originally Posted by old grey steve

You sadly won't see any oil from the gearbox area(unless the leak was horrific)when we have the car in the air and inspect we see oil sitting in and around the finned plastic and around the off side rear of the plastic sump casing and the sleeve. Best/only suggestion I can give you is car in the air covers off and inspect, if moist then there's part if not all your problem.

So your sump will look like this from the underside



nice and clean as you can hopefully see the fins you see is where a lot of the oil from the transmission general tends to lurk



notice nearest to the front the darker colour(small amount of sweating fluid) dirt has from the road also "welded itself on to the escaped fluid" you'll also notie the odd dark wet patch on one or two of the fins from fresh trans fluid leakage. If you look at another sump below



you'll see its nice and shiny(this car lost over 2 litres of fluid). And if you drain the fluid and it comes out like this




trust me it needed to be changed as this stunk!!!!

Steve lots of good info provided, and thanks for the pictures.

Would you happen to know whare to obtain a workshop manual for my car. I have searched everywhere and still unable to find. If you was able to obtain one through being a trade dealer only, I would then make the purchase direct from yourself.

[old grey steve]

Originally Posted by Monger007

Steve lots of good info provided, and thanks for the pictures.

Would you happen to know whare to obtain a workshop manual for my car. I have searched everywhere and still unable to find. If you was able to obtain one through being a trade dealer only, I would then make the purchase direct from yourself.

I'm not aware of any manual for the car that as a member of the public you can buy I'm afraid .