Overfull Transmission: 2006 2.7 auto (A340E)

Truck has 155k miles. Did a trans service at 150k, fluid level was good. It drives normal, shifts good, no leaks, no noises or other problems... all good. Today I check fluids after a good city and highway run, the trans fluid is 1/2 inch above the upper HOT mark idling in park. The truck was parked sitting at a very slight incline, nose up (in the garage). Since there aren't any running issues, should I bother draining the extra 8oz? It won't take much time or effort, I just wonder if it's really a concern. I know most engines run fine with 1/2 quart or more overfull, but this is my first time overfilling a transmission. THanks!

 

Since you were on an incline, I would check level again after warming it up on a flat surface.

 

https://youtu.be/qag71Uu9RRw

 

Wouldn't hurt to drain some of it out, then double check the transmission dipstick and fill back to the hot mark after running it.

 

Follow up to using this method >works like a charm, I had some old plastic tubing around that had a Interior diameter as the same size as my pump sprayer hose I stuck a Philips head screw driver into the hose to ream a bigger hole and pushed the pump sprayer hose in nice and tight, a couple FYIs don't leave the pump tail end too long cause the suction wont get going I would say cut 3-4 inchs up from the top of the AT dipstick tube to get some decent pressure up, you'll only need about 2' 3-4" of tube, push it all the way down you'll feel the stop, have some sort of graduated catch can to pull out the amount you overfilled. I knew I overfilled 4-7 oz. I pumped out 6 1/2 oz. I'll have to recheck it when its operating temp. Other than that it works like a charm and accurate better than having to drain from the pan or cooler lines. This will only work if you have a dipstick on your AT transmission.