Auto Trans Leak

[crash]

My TD5 Disco has developed an auto trans leak.
The mechanic figures it is coming from between bellhousing and auto.
Have to rebook it in in a couple of weeks so they can take it apart properly.
Fortunately it is a small leak and only occurs when driving. It is a real pain to keep an eye on the fluid levels without a dipstick.
I had a new transmission put in about 30K ago.
What could be causing this leak?

[GuyG]

Is the mechanic who is currently looking at it the one who fitted the new transmission? Was there a warranty with the replacement transmission?

[Franz]

My TD5 Disco has developed an auto trans leak.
The mechanic figures it is coming from between bellhousing and auto.
Have to rebook it in in a couple of weeks so they can take it apart properly.
Fortunately it is a small leak and only occurs when driving. It is a real pain to keep an eye on the fluid levels without a dipstick.
I had a new transmission put in about 30K ago.
What could be causing this leak?
So the leak is producing red oil and not black?

[30t of coolness]

Make sure the trans cooler pipes haven't been over tightened & split as the pipes seal on a rib on the pipe itself & sometimes crack.

[justinc]

Also they have a common habit of springing a leak from the front cover/ pump housing to main case gasket. It is just a paper thin gasket, literally.

JC

[crash]

Is the mechanic who is currently looking at it the one who fitted the new transmission? Was there a warranty with the replacement transmission?
No a different shop is looking at it, I have lost my trust in the original mechanics that fitted the new transmission. Yes it had a warranty but is out of warranty - had a look at the paper work and it is 18months and 50K since the change over.

[crash]

So the leak is producing red oil and not black?
Yes it is red, and I have had to top up the fluid as well. The engine oil level has not changed.