Auto Transmission Shifting Issues
Laughing Gas
Joined: Aug 2010
Posts: 852
Likes: 12
From: Kentucky
Amen brother....
I would also like to see a 1st gear lockout when not towing. Guess there could be a problem if you wanted to get out of traffic quick and its stuck in 2nd. Although, the 1-2 shift slipping for 2 seconds is not much better while pulling out either.
Senior User
Joined: Nov 2003
Posts: 283
Likes: 0
From: Wynne, Arkansas
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 84
Here's a loop for everyone.
Sunday, 2nd gear, manual mode, TCS off, upper 60's F outside, 2hr soak.
Leaving a traffic light, less than 10 mph, still in second (started off from 0 MPH in 2nd) slowly accelerating, quick loss of momentum resulting in a jerk (no high RPM's, almost a stall) then it continued to move as if nothing happened.
Over a half tank. Hasn't happened since and was certainly transmission related only this time without changing gears.
These are such strange issues.
I can't wait for this new firmware.
Sunday, 2nd gear, manual mode, TCS off, upper 60's F outside, 2hr soak.
Leaving a traffic light, less than 10 mph, still in second (started off from 0 MPH in 2nd) slowly accelerating, quick loss of momentum resulting in a jerk (no high RPM's, almost a stall) then it continued to move as if nothing happened.
Over a half tank. Hasn't happened since and was certainly transmission related only this time without changing gears.
These are such strange issues.
I can't wait for this new firmware.
Cross-Country
Joined: Jul 2006
Posts: 60
Likes: 3
From: South Louisiana
Add me to the list. I only experienced the over-revving between gears twice so far, both times accelerating into traffic. My first instinct was to take my foot off the accelerator, then it shifted with a bang. I have 14K miles. My cousin's truck is doing it, too. He has 25K on his. Called the dealer,SUPRISE!!, first they'd heard of it. Please Ford, fix this.
Junior User
Joined: Feb 2011
Posts: 84
Likes: 0
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Senior User
Joined: Apr 2010
Posts: 451
Likes: 0
From: Panama City, FL area
The couple times mine has done the slamming shift I have noticed that if it slams into third it is also going to slam into fifth. If it shifts ok into third, fifth is ok also. I have never noticed the high rev, just hard shifting about 20 times.
Senior User
Joined: Nov 2003
Posts: 283
Likes: 0
From: Wynne, Arkansas
Weird situation:
I have documented here my harsh shifting and the occasional not-sure-which-gear-we-should-be-in and the occasional shifting "flare".
It has been getting worse since I bought the truck months ago.
Yet today, with no intervention on my part, the truck shifted pretty darn good. It was freaky!
Now, we did have a pretty good thunderstorm with lots of lightning, so maybe Ford is delivering PCM upgrades via lightning strikes?
Any idea why all of a sudden it works better?
I know tomorrow it will be back to the same old harshness. (Or will it? Stay tuned!)
I have documented here my harsh shifting and the occasional not-sure-which-gear-we-should-be-in and the occasional shifting "flare".
It has been getting worse since I bought the truck months ago.
Yet today, with no intervention on my part, the truck shifted pretty darn good. It was freaky!
Now, we did have a pretty good thunderstorm with lots of lightning, so maybe Ford is delivering PCM upgrades via lightning strikes?
Any idea why all of a sudden it works better?
I know tomorrow it will be back to the same old harshness. (Or will it? Stay tuned!)
Senior User
Joined: Jul 2010
Posts: 436
Likes: 2
From: Salt Lake City, UT
Weird situation:
I have documented here my harsh shifting and the occasional not-sure-which-gear-we-should-be-in and the occasional shifting "flare".
It has been getting worse since I bought the truck months ago.
Yet today, with no intervention on my part, the truck shifted pretty darn good. It was freaky!
Now, we did have a pretty good thunderstorm with lots of lightning, so maybe Ford is delivering PCM upgrades via lightning strikes?
Any idea why all of a sudden it works better?
I have documented here my harsh shifting and the occasional not-sure-which-gear-we-should-be-in and the occasional shifting "flare".
It has been getting worse since I bought the truck months ago.
Yet today, with no intervention on my part, the truck shifted pretty darn good. It was freaky!
Now, we did have a pretty good thunderstorm with lots of lightning, so maybe Ford is delivering PCM upgrades via lightning strikes?
Any idea why all of a sudden it works better?
I believe you are the other one that disconnected the battery (like me). I've been very hesitant to say anything, but mine has done much better the last 2 weeks or so. Not perfect, still the harsh 4-5 shift and occassional very hard downshift, but much better than before. I hadn't said anything because after the disconnect it was still the same, but maybe it is learning and improving. I wanted to give it a little more time, until I saw your post.
I know tomorrow it will be back to the same old harshness. (Or will it? Stay tuned!)
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
I think this is all temperature related, brought on by cold weather, and a repeated driving pattern the initial testers and designers didn't see. longer short term cooling (soak) times than expected, but not overnight. this left the computer confused when the fluid temp sensor and the case temp sensor disagreed significantly. (upper and lower, whatever, two sensors measuring things that cooled at significantly different rates, but are interdependent)
I suspect the bang/harsh shift was the result of some exception handler saying.. whoa nellie!!.. gotta shift NOW, full pressure!! cause the other logic threw up its hands and couldn't decide. fixing this last part, and maybe shortening the timeout and softening the apply pressure curve in the exception handler would be my guess at the total fix.
I'm not an automotive engineer, but am a software system architect and designer, so I see similar circumstances all the time. the repeated symptoms discussed fit into the scenario pretty well.
sam
I suspect the bang/harsh shift was the result of some exception handler saying.. whoa nellie!!.. gotta shift NOW, full pressure!! cause the other logic threw up its hands and couldn't decide. fixing this last part, and maybe shortening the timeout and softening the apply pressure curve in the exception handler would be my guess at the total fix.
I'm not an automotive engineer, but am a software system architect and designer, so I see similar circumstances all the time. the repeated symptoms discussed fit into the scenario pretty well.
sam