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You can get about 6-8 quarts by draining the pan. Doing this every 10k is fine.
You can add a drain valve if you like.
Thanks, that seems like about 50% of the fluid. I think I'd be happy with that every 10K. I haven't checked if my pan has a plug. Is the seal reusable if I drop the plan?
My 06 f250 V10 has a plug. Does that mean anything? It was setup original to tow. I'm the 2nd owner. I was understanding that generally there's no plug.
The 5r110 is prob one the best tran's Ford ever built..Good Job Mark. Owners manual will say service them every 30k, but after I've found that only going 30k between services the fluid will still be bright red and hardly any metal on the magnet, I've started just doing them every 60k at my shop and I STILL had zero issues out of any of them. Even the ones that gets beat on every day, Towing way to much with a tune and still, zero issues after 500k miles.. Even at 60k the fluid will just be a deep red and still just a light dusting of metal on the magnet. Shoot unlike the 4r, I wouldn't even hardly know what they look like inside except for all the planitary gear recalls I had back in the day.
Last edited by LEEDSnDeed; Apr 18, 2026 at 07:03 PM.