The 722.6 trans oil looks the same as Dexron, red.
I am unsure about the cooler question. If it is really driven hard, then I suppose an extra cooler may be in order, your asking the wrong guy is the long and short of it.
Gilly

Got my trany cooler in and driving it hard. Here is the part# for the Earl's transmission oil fitting if anyone needs it.

paid $16. each.
female fitting

3001EBJ

This is the fitting that goes onto the the hard line coming out of the transmission.

I will have the Part# for the 722. trans dip-stick tool soon.

The Part# for the 722. trans dip-stick tool is 140589152100.

I am not really sure I understand how the additional tranny cooler works, coud someone please explain?
I drive my C280 hard and think I might benefit from one of these, especially them being so cheap. Though I drive hard, and change fluid every 25-30k miles, I have never burnt the trans fluid.
Thanks for the info.

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

The aftermarket tranny cooler is an additional mini-radiator for your tranny fluid. Its purpose is to provide additional cooling to the tranny to maintain lower temps.

__________________
Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record

So how hard (or easy?) is this to install? And it only costs $15??
Thanks gagin.

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

I am sure that the trans cooler costs much more than $15.

I think what c36amg88 was referring to as being $16 was the cost of the fitting, not the cooler.

__________________
Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record

Changing your trany at such interval is nice way to keep you car well maintained.

Your trany fluid should be at an optimal operating temperature. If the trany fluid is below or above its optimal temperature then less protection is provided. This is why, it is always a good thing to let you car warm up before you stomp on the LT1’s or your SVT Cobra on the freeways.

Sometimes when driven hard for long periods of time (on a track course) you trany fluid will overheat and not provide protection (just like your engine oil). Your car has a factory trany oil cooler already. But an additional one will provide extra cooling to keep it within “optimal operating temperature”.

The $16 fitting is only 1 of 4 that was used, plus the steal braded lines, the oil cooler its self, and brackets came just a little below $300. Not including self-labor.