4L60e Overdrive Problem

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11-02-2009, 09:41 AM

JeaneZ28

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4L60e Overdrive Problem

If I accelerate up to about 45 mph the car goes to shift into overdrive. If I keep the mph at 45 the car seems to be going in and out overdrive. It doesn't seem to stop unless I start to accelerate. Anybody know what it could be?

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11-03-2009, 09:03 AM

JeaneZ28

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Anyone

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11-03-2009, 09:07 AM

performabuilt

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It would seem more likley it would be dropping in and out of lockup than dropping in and out of overdrive.

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11-03-2009, 09:10 AM

JeaneZ28

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I'm no expert so maybe thats what its doing. What would cause that?

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11-03-2009, 09:46 AM

performabuilt

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Most typical reason is Random Missfire Detection by the PCM perhaps real or not and caused by either a small converter or a large cam . In anycase sounds like a tuning issue.

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