My 2000 Impala 3.4 slipped before harshly engaging.
In the first teardown they found metal in the pan & changed a valve. No
change in problem. Then they changed a shift solenoid & the car shifted fine
for a few months. The problem reoccurred & I believe they changed another
shift solenoid. After a couple of slipping occurrences they kept the car for
several days & couldn't duplicate the problem. It hasn't slipped harshly for
a couple of months. I believe that there are 2 shift solenoids. I know that
changing 1 of them fixed my car for a while. I hope this helps!
How many kilometres (miles) on the Impala. I have a 2000 Impala that had the
same issues at 103,000 kms (off of GM warranty) and the transmission had to
be replaced. They found a seal cracked inside the housing somewhere. The
onboard computer detected something wrong and placed the transmission into
limp mode which basically puts high oil pressure at all conditions so you
notice it when you shift out of park. Did you take it to the GM dealer to
have the codes pulled?
How is the color of the transmission oil? It had better be bright red, or
else replace it...
I did battle with the extended warranty company on my transmission as they
insisted that the transmission should have been serviced at 80,000 kms
although the owner's manual says 160,000 kms. They did finally pay but it
was a battle. Along the way I asked the mechanic what happened and he was
convinced it was a bad seal, he even showed me the crack. He also mentioned
that this transmission has a good service record, better than most...He did
advise to skip the GM maintenance manual on everything and cut the frequency
in half, including spark plugs at 80,000 kms instead of 80,000 kms etc.
The car has 45,000 miles (72418 km) on it, the mechanic said no codes showed
up so he couldn't find the problem. I bought the car at a Ford dealer and
bought a Ford warrantee. Ford sent it out to a Chevy dealer for the
service. Since the car didn't "act up" at the dealer they did nothing
except charge me $90. I haven't looked at the color of the transmission
fluid, I assumed the service people did that.
Thank you for your advice
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