Occasional hesitation from stop

[smithhead]

I have a stock 2021 GT with auto trans, 20k miles. Ever since new, once in a while it goes flat for a second or two a bit after starting out. This seems to only happen when I have to pull out into traffic and in a hurry, and it's almost gotten me hit. I have not had this problem in Sport mode and try to remember to do that in these situations but unfortunately forget sometimes.

A search leads me to believe it might be the traction control, but never was I very aggressive with the throttle. When it happens then I give it more gas, and it still doesn't respond. Usually I am turning slightly but not always.

And then today I had a similar but different problem that I have not had before.. I was stopped at a neighbor's house idling; the car was still relatively cold. When I went to leave, slowly, it started briefly but then seemed to go into neutral for a second before going back in gear.

Anything I should have looked at? I didn't think to have this looked at before my full warranty expired a week ago.

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[Paddles]

In normal mode the car will prefer to skip shift from 1 to 3, leaving you with no power. When that happens it's almost impossible to get the car to downshift back to 2, it doggedly sticks to 3rd gear even if you go deep in the pedal. Sport mode makes the car more willing to let you use 2nd gear but it can still skip shift on you. Paddle shifting eliminates the problem entirely but takes practice.

Easiest solution I've found if you want to stay in normal mode is just to give it more pedal, right away, from the stop. Just don't go so hard that you lose control.

As to brief neutral feeling, check your transmission fluid level or get it checked. Especially if it's also slamming into drive or reverse from park. Also I might be wrong but I think software updates were released for some A10s, dealer should know for sure if there's one for your car.

 

[smithhead]

In normal mode the car will prefer to skip shift from 1 to 3, leaving you with no power. When that happens it's almost impossible to get the car to downshift back to 2, it doggedly sticks to 3rd gear even if you go deep in the pedal. Sport mode makes the car more willing to let you use 2nd gear but it can still skip shift on you. Paddle shifting eliminates the problem entirely but takes practice.

Easiest solution I've found if you want to stay in normal mode is just to give it more pedal, right away, from the stop. Just don't go so hard that you lose control.

As to brief neutral feeling, check your transmission fluid level or get it checked. Especially if it's also slamming into drive or reverse from park. Also I might be wrong but I think software updates were released for some A10s, dealer should know for sure if there's one for your car.

Thank you. I didn't realize it skip shifted, I haven't paid attention to the shift indicator while this is happening as I'm too busy worried about getting hit.

My old Audi S4 would shift from 1-2 at 3 mph and bog down unless you were literally at full throttle, which was really annoying and dangerous when pulling out into traffic. Fortunately there was a simple reprogram for that. That shifting was obvious though. I don't feel any shifting with the Mustang.

This only happens when I am turning, so I probably back off a bit mid-turn, causing it to upshift. But yesterday I was going across traffic turning left onto the main road, but it happened when I was still going straight, before I turned and I don't recall backing off. But I will have to pay more attention in the future, but of course if I were doing that it would be in sport mode. I don't manual shift a lot as I don't really drive the car much anymore plus it takes so long to get it back into drive mode.

 

[raptor17GT]

when i had my hire car, A10 auto I found the exact same issue and it annoyed the fck out of me. IIRC before i pulled out of junctions i used the paddle shift to pull it into manual mode and it stayed in 1st til i changed up with the paddles or it timed out which was always plenty of time. This was was in normal mode.

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