4L80E and actual gear indication

[AEH]

Reviving an old thread to see if there something out there I’m missing. I’m using the 4L80 with the gm C&C TCM and harness. Dakota digital gauges. Getting the gear selection is straight forward but I’ll be using a Lokar bump shifter and I’m looking for a way to display the actual gear the trans is in. The Lokar Sport Shifter I’d like to use has PRND +/- so there’s no manual 1st gear selection through the lever.

[andrewb70]

Reviving an old thread to see if there something out there I’m missing. I’m using the 4L80 with the gm C&C TCM and harness. Dakota digital gauges. Getting the gear selection is straight forward but I’ll be using a Lokar bump shifter and I’m looking for a way to display the actual gear the trans is in. The Lokar Sport Shifter I’d like to use has PRND +/- so there’s no manual 1st gear selection through the lever.

Does the C&C TCM have the ability to use the tap shifter? The 4L80e also used a gear position switch. It bolts to the side of the trans and when used in an OEM application it would show what gear the shift lever was in on the dash.

Andrew

[AEH]

It’s been a while since I read the literature but until you asked I was confident it does. I’ll read thru it later but still pretty sure it does.

[AEH]

From the literature:

SuperMatic Transmission Control System Works With 4L80-E

Optional features for personal preferences
– Gearshift timing
– Multiple shift patterns
– Manual shift mode
– Supports most “Tap Shifters” or wheel-mounted paddles
– On-Board data logging

[andrewb70]

From the literature:

SuperMatic Transmission Control System Works With 4L80-E

Optional features for personal preferences
– Gearshift timing
– Multiple shift patterns
– Manual shift mode
– Supports most “Tap Shifters” or wheel-mounted paddles
– On-Board data logging

Did they include a wiring diagram? The Lokar is pretty straightforward for wiring.

[AEH]

Yes. Wiring the shifter is simple. I’m looking for a way to display the actual gear. If I use the Lokar there is no physical position for first, second etc gear. Only drive and the manual bump shift. Dakota digital states that the connect & cruise system does not broadcast the gear selection via obdii. I’m hoping someone has found a solution.

[andrewb70]

Yes. Wiring the shifter is simple. I’m looking for a way to display the actual gear. If I use the Lokar there is no physical position for first, second etc gear. Only drive and the manual bump shift. Dakota digital states that the connect & cruise system does not broadcast the gear selection via obdii. I’m hoping someone has found a solution.

This is where you would use the gear position sensor that bolts to the side of the trans.

[AEH]

Thanks Again. That would take care of PRN&D and that’s doable multiple ways, but that’s not my question.

[andrewb70]

Then I'm confused what you're asking.

[AEH]

Is there a way to display the actual gear the transmission is in. ie. 1st 2nd etc. Park, reverse, neutral and drive are physical positions, easily determined by the position of the shaft. When in manual mode, there will be no indication whether your in 1st or 3rd. Not that that’s a huge deal, but if there is a way to get the gear selection information from the ECM/TCM, it’d be nice to have. It’s in there.

[andrewb70]

Is there a way to display the actual gear the transmission is in. ie. 1st 2nd etc. Park, reverse, neutral and drive are physical positions, easily determined by the position of the shaft. When in manual mode, there will be no indication whether your in 1st or 3rd. Not that that’s a huge deal, but if there is a way to get the gear selection information from the ECM/TCM, it’d be nice to have. It’s in there.

Your controller should have a commanded gear channel. This information should be available over the CAN bus.

Andrew

[AEH]

Dakota digital states that the connect & cruise system does not broadcast the gear selection via obdii.

Figure out how to get it out of there for me then.lol. That’s my question.

[andrewb70]

Figure out how to get it out of there for me then.lol. That’s my question.

Various companies make OBD2 interfaces that can display data. Look at PCS. They have a paddle shifter with a display. They may sell just the display.

Andrew