Transmission shift

Asked by Ksanford95 Apr 23, 2019 at 11:36 AM about the 2004 Chevrolet Trailblazer

Question type: Maintenance & Repair

I just changed the transmission filter amd fluid on
my automatic 2004 4wd trailblazer. Now it runs
fine but it wont go into 3rd. It goes into first fine
amd goes into second fine but it just womt shift
into 3rd. It sounds like its trying to but it juat wont
make it. And ideas?

1 Answer
60

Billy answered 4 years ago

Well, I've seen this happen a few times, when you change the fluid in an older transmission. Sometimes little bits of grit or burnt fluid will get in the valves that control when the car shifts and get stuck. Sometimes you can flush it out, but a lot of the time it will just make it worse. I'd take it to a mechanic and see what they can do about it. It may need a rebuild. Although I recommend just getting a used transmission. Rebuilds are pretty pricey and they aren't done right almost half the time unless your mechanic knows what he is doing.

Mark helpful

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