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Old 10-24-2007, 01:33 PM
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4l60e sonoma trouble

Hi guys,
I've got a 2002 Sonoma with a 4l60e behind a V-6. I pulled out the other day and when it went to shift from 1st to 2nd, it just revved up and finally slid into 3rd. Later when I went to back up, I found that I was without reverse. Now, it gives a hard shift between 1st and 3rd - I take it up to about 25MPH, then back off the gas and it goes into 3rd, and it doesn't go into 4th at all. Plus, no reverse.
I had it scanned, and it read a PO752; shift selenoid A stuck on.
Instead of jumping right into changing the selenoid, I changed my oil and filter. The pan was real clean, no metal etc, just some old oil. My od. is at about 95,000. After the oil and filter change, it still acts the same.
Anybody have any ideas? Can the A selenoid blow out reverse and keep it from going into 4th? Is it really a selenoid, or could it be ignition problems, which I have heard can make the scan innaccurate?
Thanks for any ideas

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Old 10-24-2007, 03:35 PM
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This is a very common failure in the 4L60E. It is a broken or stripped reaction drum (sun shell) It will require removing and tear down (basicly overhaul time with 95k on it) Make sure whoever does the work replaces the orginal with an aftermarket unit called "the beast" It is beefed up where the origanal fails.Sorry for the bad news, hope this info helps.
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Old 10-25-2007, 01:48 PM
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That's the opposite of what I wanted to hear. I was hoping for an easy fix. -Guess I better get out the old check book!
Thanks for the info Randy!
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