rattling sound

2000 jetta - automatic

the word "automatic" seems to be the problem here.

So between 1200-1400 rpm's my car makes a really loud rattling sound coming off the driver side. It happens at other low rpm's but a lot less frequently. I'm 99.9% sure that this is a transmission issue, but I don't exactly know what and I don't know my way around transmissions very well. Could it be a torque converter issue? I still have good power and shifts nice into all of the gears. I should mention it occasionally happens in park, but its a very even rattle. Anything helps.

Thanks to anyone who responds. Really helps me out. Ben

Might be harmonic vibration. Have you inspected your CV axles yet?

Nero Morg said:

Might be harmonic vibration. Have you inspected your CV axles yet?

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No, haven't done much yet as I don't really have time right now - working too much. I'll probably check it out tomorrow, hopefully it's just harmonics

Nero Morg said:

Might be harmonic vibration. Have you inspected your CV axles yet?

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CV axles checked out good
Anything else I should look at before I drive in by the tranny and check out torque converter?

Can you get someone to work the go pedal and cause the vibration?
Might be easier to find.
I've found a few rattles by hitting things in the area.
By hand or lightly with a rubber mallot.