Question about 1996 Chevrolet Blazer

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For the last couple of years I have had this issue and hope someone knows what is causing it.

After I average 60mph + for about an hour or so my check engine light comes on( or when towing my boat at any speed for more than 30 minutes), after I stop and re-start, the transmission SLAPS (jerks) into 2nd. This continues until I have started and restarted the engine 10-20 times, or disconnect the battery for about 10 seconds. After that the check engine light goes out and the tranny works properly again.

To avoid the slapping I just manually start the vehicle in 2nd gear and then bump it back up to 3 and then OD.

It's more of an annoyance than anything. I talked to a transmission shop and he has some theories, but nothing I am willing to spend a Grand on....... it seems to me it's more of a computer problem than a transmission problem, since disconnecting the battery ALWAYS makes my problem go away. I read somewhere before that this vehicle has a computer regulated pressure system in the transmission, one theory is that there is a computer problem for some reason, telling the computer that it needs "more pressure" when shifting to 2nd, thus causing the slap.

Thanks in advance for any response.

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  • Anonymous Dec 30, 2008

    I have a 1996 s-10 pickup with the same problem.



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  • 16 Answers

Youre blazer has a electoncly contoled 4L80E trans. my buddy has the same prob with his 2001.i think is a faltly presser senser or a shift soloniod

Posted on Dec 30, 2008


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