Transmission downshifting hard and when shifting up it hesitated to shift

2013 HYUNDAI ACCENT
92,000 MILES • AUTOMATIC
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ERIC JOHNSON4
  • MEMBER
  • 1 POST
Does not feel like it is slipping. Feels almost as if it is losing communication from the computer. And engaging then disengaging over and over again.
Oct 28, 2018 at 4:17 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning.

It is very possible that it needs an update to the TCM. They require updates just as your home computer needs updates as well.

Have you kept up on service? Have you change the oil/filter in the trans as needed? A lot of times, sticking valves in the valve body will cause this.

Roy

https://www.2carpros.com/articles/automatic-transmission-problems

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
Oct 28, 2018 at 6:38 PM
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