4L60e Overdrive Problem

JeaneZ28 · 11-02-2009, 10:41 AM

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?

JeaneZ28 · 11-03-2009, 10:03 AM

Anyone

performabuilt · 11-03-2009, 10:07 AM

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

JeaneZ28 · 11-03-2009, 10:10 AM

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

performabuilt · 11-03-2009, 10:46 AM

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.

JeaneZ28 · 11-03-2009, 11:01 AM

Thanks for the info I will have my tuner check it out.