my Pontiac g6 doesn't want to shift after the car is driven for awhile , but when co0ld nit shifts just fine, any ideas ? haven't tried anything , not sure what to do

  • have you checked the trans fluid level?
    – Moab
    Jul 14 '18 at 23:14

Have the transmission fluid changed. If you notice an improvement, have the fluid changed two more times, 500 miles apart.

I had the same problem, which was resolved once the valve body was rebuilt.

  • So the real answer may be to rebuild the valve body...
    – Solar Mike
    Jul 15 '18 at 14:05

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