2001 Pontiac Grand Am trans shifting hard

TONY MARTINEZ

MEMBER
2001 PONTIAC GRAND AM
3.4L
V6
FWD
AUTOMATIC
144,000 MILES

Just had a used 3.4 motor put in I get my car back and it slams when I go from park to reverse and neutral to drive changed motor mount other looks good

Monday, April 6th, 2015 AT 8:53 PM

5 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Have you checked the oil level in the transmission and is the idle speed correct?

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Tuesday, April 7th, 2015 AT 2:58 AM

TONY MARTINEZ

MEMBER
3 POSTS

Not sure on the idle wat should it be idling at and how do I idle it

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Tuesday, April 7th, 2015 AT 8:45 AM

MHPAUTOS

MECHANIC
31,937 POSTS

Just a s long as it is not racing at idle, the idle will be controlled by the ECU

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Tuesday, April 7th, 2015 AT 4:11 PM

TONY MARTINEZ

MEMBER
3 POSTS

Changed two motor mounts and its ildling at 1000 rpm the tranny still slams into drive would missing a bolt where the tranny bolts into the engine I'm stump only other thing it mite be is the silnoid not sure thank u

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Tuesday, April 7th, 2015 AT 11:22 PM

MHPAUTOS

MECHANIC
31,937 POSTS

The missing bolt will have no controlling factor at all, sounding like a sticky internal shift valve, as internal pressure come on servos activate if valving is sticky pressure builds up and then releases servo with extra force giving the slam into gear feeling, go get a trans service and see if that helps.