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2004 Chevrolet Impala Question: 04 Impala LS 80K mi. Intermittent trans issues see below

 

Question

DR49, 3.8L V6, Frederick, MD, March 01, 2013, 10:50
 Rookie

1 - going from stop, you gas it & it starts to move like it's under a strain then a deep internal slam & it takes off. could be trying to start in a higher gear then dropping into 1st when rpm's increase?
2 - randomly has a bump or thump when upshifting under light throttle (all 3 shifts), other times shifts quietly & smoothly.
Both problems are very intermittent, doesn't seem to matter if it's warmed up or cold

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  • Answer #1

    Greg's Orange Auto (12192 Answers) , Orange, CA - (714) 361-9386
    globalhelper March 01, 2013, 12:54
     Master

    ck trans fluid level and also see if its dark brown. if its dark brown try trans service to start with

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    DR49, March 01, 2013, 14:43
     Rookie

    Thanks, but definitely not it. Bought in Dec from a Volvo dealer. Took it back soon with these problems, they had for several weeks, couldn't diagnose, put a rebuilt trans in. Now better, but still same symptoms, just not as frequesnt. I know you can get a bad rebuild, but odds of the exact same issues have to be low. I wonder if they really even needed to put trans in it. Could it be some kind of electrical gremlin vs mechanical?

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    pushrod, March 01, 2013, 15:53
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     Master

    Try a can of seafoam trans. tune!

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    globalhelper, March 01, 2013, 17:19
     Master

    do you have any trans codes?

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    DR49, March 01, 2013, 17:36
     Rookie

    thanks for the reply. don't know, dealer is working on it. They're a Volvo dlr, they sub the work out to an independent shop down the street. dlr bending over backwards but I have no confidence in their guy. Trying to get them to work with Chevy dlr or trans shop

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