Boosted
Well-Known Member
My 2020 Expy transmission was having many of the telltale signs that the 10R80 was not working as intended.
-Hard engagement from park to reverse/drive
-Clunky shifts between 5-3 on downshifts when decelerating.
Problems started at ~37K, but I kept seeing Ford dragging their feet on really fixing the problem with the CDF drum, so I waited as long as I could and called my local dealer about a month before the 5-year powertrain warranty expired, and made sure a loaner was reserved. The car went in with about 5 days left on the warranty.
The tech verified the conditions, found no codes, and rebuilt the transmission under TSB 25-2026C with the latest CDF drum part number JL3Z-7H351-B. Time in the shop ~5 weeks.
I picked up the truck on a Friday night and left for a ~1200 mile trip to Canada the next morning. Everything was going fine until driving home. I had one weird shift downshift from 10-9-8 at 75mph. I don't know if the transmission just had a little burp, or it was a combo of the adaptive cruise and changing lanes to overtake slower traffic. Next thing I know I see the transmission temperatures climb and match or exceed the coolant temps. Temperatures topped out at 230F on both coolant and transmission temperature. I took her off cruise and slowed down to see if things would cool down and they did.
For the rest of the trip the transmission temps stayed 10-20 degrees below the coolant temps. For the most part the transmission stayed around 203F.
Any thoughts?
-Hard engagement from park to reverse/drive
-Clunky shifts between 5-3 on downshifts when decelerating.
Problems started at ~37K, but I kept seeing Ford dragging their feet on really fixing the problem with the CDF drum, so I waited as long as I could and called my local dealer about a month before the 5-year powertrain warranty expired, and made sure a loaner was reserved. The car went in with about 5 days left on the warranty.
The tech verified the conditions, found no codes, and rebuilt the transmission under TSB 25-2026C with the latest CDF drum part number JL3Z-7H351-B. Time in the shop ~5 weeks.
I picked up the truck on a Friday night and left for a ~1200 mile trip to Canada the next morning. Everything was going fine until driving home. I had one weird shift downshift from 10-9-8 at 75mph. I don't know if the transmission just had a little burp, or it was a combo of the adaptive cruise and changing lanes to overtake slower traffic. Next thing I know I see the transmission temperatures climb and match or exceed the coolant temps. Temperatures topped out at 230F on both coolant and transmission temperature. I took her off cruise and slowed down to see if things would cool down and they did.
For the rest of the trip the transmission temps stayed 10-20 degrees below the coolant temps. For the most part the transmission stayed around 203F.
Any thoughts?
