4L80E sport shift mode

For non EFI mechanical discussion
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Joined: Fri Feb 24, 2017 11:27 am

Re: 4L80E sport shift mode

Postby gmtech825 » Sun Jun 06, 2021 12:50 am

Ok, so what you posted is only selecting how the performance/tow mode is selected by the driver. Not a manual/sport mode. It is telling the pcm if class 2 or manual switches are used to select the secondary shift tables. There is a boolean switch in OS 12587603 that allows for manual shift mode, but I'm not sure if the pcm has actual inputs for manually shifting. That might be for vehicles with TCMs.

Posts: 15
Joined: Mon Sep 26, 2016 2:45 pm

Re: 4L80E sport shift mode

Postby Sachem » Fri Jun 11, 2021 2:21 am

The OS is 12587603. Sorry for the delayed response, been working too much!

Posts: 15
Joined: Mon Sep 26, 2016 2:45 pm

Re: 4L80E sport shift mode

Postby Sachem » Fri Jun 11, 2021 10:41 am

I sent the sport shifter back since it will not work with my ECU. I purchased an old fashioned gate shifter. When I get it installed I will try using pins 71 and 31 and post my results. Thanks to all who answered my post.

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