2018 Expedition Tranny Occasionally Slipping in Reverse

[Tom Tulloch]

I've read a couple other older posts from people experiencing similar issues, but have seen no resolution. My 2018 Limited has about 78,000 miles - and is a former Enterprise rental. I bought it with about 60,000 miles. It is not garaged and I've noticed lately that after it sits for a few days when I shift to reverse to back out of driveway, the transmission will hesitate and slip for a few seconds before taking hold. I've read that some run their trucks many more miles before a transmission fluid flush and filter change and was just wondering if this is a sign of failing fluid or something much worse.
Thanks!

 

[Tom Tulloch]

Any recommendations for a transmission flush?

 

[Timo2824]

My 07 explorer with 165,000 has the 6R60, my 19 Transit 250 with 85,000 has the 6R80 and both of them do it. Your 18 has the newer GMord 10 speed, so it might just be common deal with them. Both seem worse when it's cold and sat over several days, and if I'm in reverse as soon as the engine starts. If I let them run a couple of minutes there's no delay. My Transit just started around 75,000 miles.

 

[justinp16ex]

You may want to change the fluid and filter.