transmission only changes when traveling fifty mph

2000 CHEVROLET IMPALA
120,000 MILES • 3.8L • V6 • AUTOMATIC
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JENFRY
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  • 1 POST
good day,

My vehicle presents faults since sometimes only makes a change of speed and when going to fifty mph the rpm's in four. Does not make the other change, but it is only sometimes! Why is this fault? How can i fix it?
Nov 21, 2016 at 7:18 AM
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HMAC300
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  • 48,601 POSTS
scan for codes first to see if there are any. it sounds like a transmission problem so have him look at it. he can scan as well.
Nov 21, 2016 at 7:20 AM