Shifting hard in traffic

Tiny
SUSEN
  • MEMBER
  • 2004 PONTIAC GRAND PRIX
  • V6
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
I have noticed for the past few years that only when I am in traffic that my automatic transmission likes to act manual. If I am in constant stop and go traffic then after about ten minutes or so when I press on the gas I notice that every five mph it shifts hard so it jerks forwarded. When I get up to normal speed and constant movement it gets less and less until it goes away. Whats wrong?
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Monday, August 22nd, 2016 AT 7:47 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,606 POSTS
Check fluid if you have a dipstick if not a mechanic will have to do it. If color is dark brown or black there is something internally wrong. Then have a transmission professional scan for codes.
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Monday, August 22nd, 2016 AT 7:57 AM

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