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Andye39

2002 e39 losing auto gearbox fluid

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Hello, this is my first post as a new member.

I only bought the car 2 weeks ago with a known gearbox 'slip issue, turns out the slip was because the gearbox had next no fluid in it after the drain plug was removed. 

My mechanic topped it up on sunday evening and it definitely made a difference however today on return from work there was a lot of fluid on the ground under the car.

Both drain plug and fill plug have been replaced after use.

Can anyone help by suggesting possible ways the gearbox may be losing fluid and pretty quickly at that.

 

Thanks in advance,

 

Andy.

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Clean it off, run it and find where it is leaking. Hopefully, it will not be where the bellhousing mates up

 

PS.

If you are losing ATF fast, the gearbox could get hot. Overheating kills auto gearboxes. So it is critical you keep and eye on it. Leaking from the front of the bell housing indicates the main seal may be gone. That's a gearbox out job. Once out, you would want to ensure that the lay shaft isn't wobbling about or you will be doing it again.  

Edited by whiskychaser

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 Check where the gearbox coolent pipes connect to the gearbox rad. They are on the pass side, one on top of the other, held in with a clamp and in there are two little seal's which can go awol.

 

 

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Try posting in the E39 section for a better response.

Transmission leaks can occur between the torque convertor and transmission seal, the tail shaft seal, the oil pan gasket, and the oil cooler pipes, and the oil cooler itself.

You could put a sheet of wallpaper backing paper under the car to see where the area of the leaks are, after removing the plastic undertrays.

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Thank you all for the replies,

 

Turns out the ATF leak is coming from the cooler pipes at the near side close to the edge of the radiator.

Car has had a botched repair by a previous owner.

So it's a new cooler/pipes to fix the problem properly.

Not sure if the pipes are available separately or if the come as a unit attached to the cooler.

 

Appreciate the help, much appreciated.

 

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10 hours ago, Andye39 said:

Thank you all for the replies,

 

Turns out the ATF leak is coming from the cooler pipes at the near side close to the edge of the radiator.

Car has had a botched repair by a previous owner.

So it's a new cooler/pipes to fix the problem properly.

Not sure if the pipes are available separately or if the come as a unit attached to the cooler.

 

Appreciate the help, much appreciated.

 

 

 The pipes and cooler are all availble seperatly

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