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2002 Chevrolet Venture 1SA Pkg 4dr Reg WB

2002 Chevrolet Venture
Trim Info:
Front Wheel Drive, 4 Door, 2WD Minivans
19 mpg city / 26 mpg hwy
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May 1, 2013, 7:49 pm

Kurt B

Question: My transmission punches quite often when I'm driving. Could a transmission flush fix this problem?

When I'm driving, even if I'm keeping a constant speed, the transmission will jerk or punch at times. The van has 190k miles on it, and I got it 10k miles ago. Is it possible that it could just need a transmission flush? I don't have any problem with power going to the wheels during acceleration. Also, I think I checked the fluid before, and it seemed fairly red. I hope it's not the computer causing the issue, but then again, the engine isn't reporting any codes against the transmission. Would the check engine light report on a transmission problem?

May 5, 2013, 7:06 am

Ron W
Expert Mechanic

Lots of things can cause abnormal shifting. You'll have to have a transmission shop diagnose whether it's in the transmission itself, or if the transmission is reacting to a sensor giving it poor data.

a flush probably won't fix this type of issue, but if you haven't had it serviced in a long time, it is a good place to start as poor fluid quality can cause problems.

Transmission related codes can turn on the check engine light, but sometime a malfunctioning transmission won't set codes for symptoms like you are describing.

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