Absolutely, as in your case you have a system of flushing it all out each time so its ok. I would only be concerned if you have high mileage 100K+ or don't know the history.
Originally Posted by kaneboats
Case in point, the Vette is turning 140K tomorrow, maintenance book shows it got a full trans rebuilt at 120ish but I will still only drop the pan, change filter and keep going. Just the way I do it lol.
On the diesels I had it was simple, the pan had a drain plug in it. I would drain them at 12K and refill, then change filter every other drain.
This is all we did at cadillac for a trans service. Drop the pan, change the filter, and top off with new fluid. You never got all the fluid in one hit but you diluted it enough doing this every 30k that it stayed pretty fresh.
Originally Posted by mmandley