Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 4L60E no shift, one gear only
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Old 04-26-2011, 07:38 PM
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Have you scanned the vehicle?

What is the history on the vehicle?

Mileage, recent trans repair work or service?

If the speed-O ias not working the system does not knwo the vehicle is moving... since you say the speed-O works, there is another test

You can unplug the trans connector at the case or remove the trans fuse in the panel. This will put the trans into default - fail safe mode. The trans will then be in 3rd gear and would not want to move from a full stop without lots of throttle applied.

That will at least tell you the 3-4 clutch pack is good

In manual 2nd gear, the trans is not in 2nd gear?
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