Has anyone with an automatic trans had their transmission Heat exchanger (located on the passenger side of the block) fail?If so is this a prone part to fail?The reason im asking is that at 10 years, and 8 year old engine coolant(before i changed it), im wondering if it will stand the test of time, or if i should go about replacing it, and avoiding trashing my fully built transmission.

...to me, I don't see how it could fail?

...to me, I don't see how it could fail?

Just like the rad cooler in the rad. A leak between the 2 fluids. Never heard of one leaking/failing. only the lines to it.