Question about 2001 Chevrolet Impala
I have a 2001 Impala 3.8 with 90K; bought 18 months ago. The trans always shifted smooth; dont know if or when the fluid was changed last. Was told the fluid smelled burnt so I had it changed. Now it shifts hard and abruptly after about 20 minutes driving. What should I expect a trans shop to tell me? Not looking for a repair bill as it still shifts smooth when cold. Is dirt now getting stirred up; can/should it be flushed? Opinions please, before they have me do something I dont need to.
Check the transmission filter.
If replacing or refilling transmission fluid does not help, there are many possible reasons why this happens.
The most common is a faulty shift solenoid. The solenoid pack is located on the valve body in the transmission.
A faulty TPS or a faulty speed sender can cause trouble shifting.
A slipped component inside the transmission can cause similar problem.
The transmission is also controlled by a module caused TCM, that will be the last part to test.
The first step in troubleshooting is getting the fault codes from car computer.
You can get a free Fault Code reading at AutoZone. The test is free of charge.
If there is no AZ in your area, then you can either go to a local mechanic and have the code reading done for a small fee, or purchase a code reader and hook it to the PCM module to read codes.
If you have Autozone near, go there, and have the code scan done.
Take note of the codes on a piece of paper and come back here with the codes, so that we can be more specific on what the problem can be and how to fix it.
Posted on Nov 12, 2009
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Posted on Jan 02, 2017
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