For those of you with automatics, I found a secret from a parts supplier.

[Whitexi]

I ordered a new Automatic trans cooler T-stat from AutohausAZ and it stated it was a Wahler oem.

When it arrived it indeed was stamped with the logo and part number. For what the dealer wanted $75 my cost and $90 list I got this shipped for $53.77. Free ground shipping to since anything $50 or more qualifies.

http://i434.photobucket.com/albums/qq66/whitexi/1160999225_photobucket_54232_.jpg?t=1311979135

http://i434.photobucket.com/albums/qq66/whitexi/1160999225_photobucket_54252_.jpg?t=1311979162

WINNING!

[Hornung418]

Solid! And now your transmission will thank you too!

RootedDROIDXstatus. Come at me, bro.

[Whitexi]

Solid! And now your transmission will thank you too!

RootedDROIDXstatus. Come at me, bro.

Yes I hope so! Its original with a lot of miles, never changed it when I did the cooling system at 120k because I didn't know it existed. I was a real noob :eeps

[Mtnman]

Ok i bite. I have an auto trans, and dont know what an "auto trans cooler t-stat" is. Is this just for IX models, or what. More info please.

[Whitexi]

Ok i bite. I have an auto trans, and dont know what an "auto trans cooler t-stat" is. Is this just for IX models, or what. More info please.

Its in all E46's as far as I know with an automatic transmission. It sits under the expansion tank, so i have to pull it to change it. Basically its function is to help the trans fluid heat up when cold and then keep it cool when hot. Same as a regular t-stat function I guess, closed cold and open hot.

Here's a link to explain http://www.e46fanatics.com/forum/showthread.php?t=760515

[az3579]

Its in all E46's as far as I know with an automatic transmission. It sits under the expansion tank, so i have to pull it to change it. Basically its function is to help the trans fluid heat up when cold and then keep it cool when hot. Same as a regular t-stat function I guess, closed cold and open hot.

Here's a link to explain http://www.e46fanatics.com/forum/showthread.php?t=760515

Is this one reason why it's more of a biotch to do the cooling system on an auto, other than the mechanical fan? I thought I remember hearing something about the expansion tank being hard to remove as well. Any thoughts?

[DeM3n]

Is this one reason why it's more of a biotch to do the cooling system on an auto, other than the mechanical fan? I thought I remember hearing something about the expansion tank being hard to remove as well. Any thoughts?

Eeek! I hope not.

[danewilson77]

Is this one reason why it's more of a biotch to do the cooling system on an auto, other than the mechanical fan? I thought I remember hearing something about the expansion tank being hard to remove as well. Any thoughts?

It's not been that easy to remove on my auto, or my manual.

[Whitexi]

Yea it's the same to remove on either car.