Tranny Flush at 30K?

i think i was around 50k when i did mine and it was pretty damn black, so around 40-50k should be ok

I just hit 45k, I am doing mine next week to be prevenative and because I am switching to Royal Purple Trans fluid.

Plus doing myself makes it so much cheaper on my wallet.

I did coolant flush last week because I changed hoses.

Next is brake and Power steering ( ATF ).

i did mine around 30k, because it was pretty black and I wasn't going to do multiple drain and fills.

I had mine done at ~35k, but only because they had to while installing a Quaife in it Otherwise I probably would have stuck to what the manual suggests and done it around 60k.

This is in a manual transmission car; if I had an automatic I might consider doing it a bit earlier, as they seem to be harder on their fluid.

I just did my 2nd ATX flush at 35k. The first one was done at 15k, when I switched to Mobil 1 synthetic ATF. The fluid coming out at 35k looked horrible...like used motor oil, not red at all. I'm going to stick to 15k intervals on flushes, or I'll start doing drain and fills with every oil change (I change oil every 5k).

The ATX in the 3 absolutely eats fluid for lunch.

I'm pretty sure D Bone, if he checks in, can show you what his fluid looked like at 30K or before (can't remember). It was pretty bad!

I think it has a lot to do with where most of your driving takes place. More city driving will eat the fluid a lot faster. I do mostly highway/interstate driving and my atx fluid was still dark red and smelled normal at 30k but I had it flushed at the dealer anyway. The new fluid was only a little bit brighter and it still shifted the same afterwards so that tells me my old fluid was still good.

[quote author=mshu7 link=topic=137582.msg2967000#msg2967000 date=1235834339]
I'm pretty sure D Bone, if he checks in, can show you what his fluid looked like at 30K or before (can't remember). It was pretty bad!
[/quote]

I knew my ears were burnin'! I don't have pics anymore, but on my ATX, 2006 GT hatch, I couldn't believe how black my OEM fluid was after only 12K miles or so. My average miles are probably 65% highway and 35% city. 70-75mph on the freeway, and the temps range from 15f to 113f year around.

I have adopted the drain-refill at each oil change, because draining the ATF fluid, is actually easier then changing the oil. I could easily do it every 3rd OCI, but since I'm giving my car to my daughter in a few years, and it has to get her through high school and college, I'm taking no chances. Knowing what I know, I wouldn't go past 20K on the fluid.