2008 Chevy Impala SS transmission problem


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2008 Chevy Impala SS transmission problem

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Jackson111
New User

Nov 16, 2016, 12:04 AM

Post #1 of 4 (3826 views)

2008 Chevy Impala SS transmission problem

2008 Chevy Impala SS. 170,000 miles, 5.3 L V-8 engine. It seems like my transmission is slipping a little. When I was driving and I set my cruise at 85 and was cruising along and every once in awhile my RPM's would jump 400-500 for a few seconds and then return back to normal. When it did that, my engine would kick a little and the car would jerk forward but I didn't lose or gain any speed. Could that just be from low transmission fluid? I drove at a slower speed and my engine still kicked and my engine roared without me pushing down the pas peddle more. I haven't tried anything yet. Was looking for any help.

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 16, 2016, 5:05 AM

Post #2 of 4 (3818 views)

Re: 2008 Chevy Impala SS transmission problem

It may be simply downshifting to maintain momentum.

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

kev2
Veteran
kev2 profile image

Nov 16, 2016, 6:24 AM

Post #3 of 4 (3809 views)

Re: 2008 Chevy Impala SS transmission problem

Scan for codes yes even if CEL is off...
the cruise control stays engaged just the RPM flair, no mountains, rolling hills, road grades - anything that would change MAP ?

Jackson111
New User

Nov 16, 2016, 7:57 AM

Post #4 of 4 (3801 views)

Re: 2008 Chevy Impala SS transmission problem

The first couple times it happened there were some hills but I didn't lose speed at all. My RPMs just kicked up briefly. Now it seems like it happened even when I'm not going up hills.

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