Anyone familiar with TCI handheld controllers for auto?

[XfireZ51]

Yep. That's what it is.

http://www.dakotadigital.com/pdf/sgi-5c.pdf
Can't tell by pic but it looks like there's no sensor ground.

[Schrade]

I'm presuming Dominic, that it is a signal adaptor of some sort, although it's of course not part of the TCI EZ-TCU control module. I haven't found reference to an external / 3rd party device yet in the schematics, or install instructions...


Still digging though.............................

[WVZR-1]

You won't find reference to it. I don't believe there's a necessity for it unless there was something done foolishly internally of the transmission that would have eliminated the drive/driven combination for the VSS. All C4 Corvette 700R4, 4L60 and 4L60E tailshaft housings I'm quite sure are the same for the one piece case that was used. I would have thought unless the controller wanted to see a different type of signal it could have been assembled with a 15 tooth drive gear and maybe a 41/42 tooth driven using your VSS from the ZF. The 15 tooth drive is a tough find but I believe I could. The source might be very expensive. Very!

It could be done with a 17 and a 45 but the speedometer would read a little fast. 45 is the MAX driven available.

I believe that the 4L60E uses a relluctor wheel and a different VSS originally but I would have guessed that it could have been accommodated in the transmission build. It may very well not have been able to have been done because the output shaft is differently part numbered, maybe my thoughts are all wet but I've seen extensions made for the 2-piece case 4L60E that offer up the drive/driven VSS combination needed. I had found information that mentions the internals remained interchangeable.

I actually thought maybe the build would have been done with a 2-piece case since there's a QuickTime housing that mates the LT5 directly to the center case and there's a 6 to 4 bolt adapter and extension to finish it off. I did it on paper but wasn't able to confirm one dimension which would have confirmed the build was a dimensional fit correct for the C-beam and the drive-shaft. It's generally mentioned that any 4L60E can be fitted to the C4 using a cut-off wheel to shorten the output-shaft by 1".

[Schrade]

So I'm starting by install instructions first, before wiring trace...

1) Connect main harness connector, and VSS connector to tranny...

Back end up, and ...

And I got new fluid on the floor.

I thought that maybe just an over-filled tranny had blown off excess fluid, and was happy. Not so...

It's running down the C-beam, with the front on ramps. WHAT ORIFICE IS ALLOWING THIS??? Certainly not the VSS connector - it's DRY.

[Schrade]

Alright there Dave - driveshaft yoke centers are about 27.0". Cannot get a good draw on the C-beam just yet here...

And a part # on the output shaft / yoke:

[Schrade]

Originally Posted by Schrade

So I'm starting by install instructions first, before wiring trace...

1) Connect main harness connector, and VSS connector to tranny...

Back end up, and ...

And I got new fluid on the floor.

I thought that maybe just an over-filled tranny had blown off excess fluid, and was happy. Not so...

It's running down the C-beam, with the front on ramps. WHAT ORIFICE IS ALLOWING THIS??? Certainly not the VSS connector - it's DRY.

So I felt with my grubby digits on the C-beam, where the yellow arrow is.

Dry.



Felt the rear end of the C-beam, and of course, wet.



Then I saw the one telltale drop. Under the output shaft yoke - see pic.

My output shaft seal is leaking, and dripping off the yoke.





Leaking only because the front end is on ramps? So what if I park on a hill with such a shallow incline? Gravity feed will never equate to gaseous pressure from heat while in operation.

Bad install, and a bad tranny seal.

You busy there Pete? I'm reachin'for a sleeping bag and toothbrush...

[Schrade]

Not much reason to continue here - anyone believing this tranny WON'T have to come down? Can a new seal be installed with tranny in place???

1)
So the main harness, and VSS harness APPEAR connected properly (liberal usage). I'll follow the VSS harness carefully, for the speedo error, while I try to find the Comm Error of the handheld...



2) RPM signal in handheld SEEMS good...

3) Handheld does SEEM to calibrate TPS in idle position, and at WOT position, ignition on, with no error messages for that function...

4) Doesn't apply.

5) Unit mounted (although with damage to dash underside panels).

6) Battery has 2 new connectors, on top of main connectors (I'm presuming those are correct).

7) Module Power / Diagnostic light comes on with key to Run; I'm assuming for now that that's correct...

8) Does not apply.

9) No new switches are installed for this feature, that I see. ???

10) No new switches are installed for this feature, that I see... BUT, with respect to the Comm Error (unsaved handheld changes):
Must this circuit be closed (or switched), in order to make ANY changes to programming? Either basic, in Setup Wizard, OR IN ADVANCED OPTIONS???

Doesn't seem likely, EXCEPT:



Does this text indicate that some changes (3C, 3D, is Advanced Options stuff), cannot be written, including basic Setup Options, unless this circuit is wired???

[Schrade]

and now #11...

If an electronic speedo is used, route the speedo output (of the TCU module, presumably) to the speedo.

Where? At the speedo wire of the cluster input? Or BEFORE the ECM speedo output? Or to the speedo ECM INPUT???

Or to the Dakota Digital? And from there, TO where? NOW IS TIME TO RESUME TRACING...

[XfireZ51]

The DD unit converts the VSS pulse from the trans to something the ECM can understand.

[Schrade]

Originally Posted by XfireZ51

The DD unit converts the VSS pulse from the trans to something the ECM can understand.

OK ... so, the VSS pulse (from tranny) goes to the DD FIRST? Or, IS SUPPOSED TO, FIRST???

And then FROM the DD TO the TCU Module?

And then from the TCU module TO ... where?

------------------------------

I think the path is

VSS OUTPUT -> TCU module -> Dak Dig -> ???

It's dark and chilly now (not enough Global Warming in Schrade's carport), so wire trace is incomplete...

Studying Wire Diagram for Module now ...