A-4 in third for Dyno

[Beer99C5]

When I was dabbling with the Predator, James at RWTD said he could create a tune to keep the transmission in third gear (1:1) for dyno runs.

Can I do the same by just using the bidirectional controls on the dyno?

Get the drum rolling, let it get to third, then lock it in third with the Bi-Dir; do the pull, then unlock it?

[joecar]

Should be able to; can also lock/unlock the TCC if required.

[zrx1200]

with a bit of wiring and an extra switch you can have full manual.been meaning to try it ....d0409.......these options enable the various shift pattern modes within the PCM.
Note: J1 is the 'BLUE' connector on the PCM.
Switch types used must be momentary connect to ground.

'No Switch' = Performance mode via a switch is not functional.
'One Switch' = Performance mode via a switch can be activated (J1 - pin71).
'Two Switches' = Performance mode via a switch can be activated (J1 - pin71), and Manual Mode can be activated (J1 - pin31).
'C2 Data Bus' = Shift pattern modes are sent on the data bus to the PCM from another module, eg - BCM.

Only the following values may be entered into this table:
- No Switch
- One Switch
- Two Switches
- C2 Data Bus

[minytrker]

with a bit of wiring and an extra switch you can have full manual.been meaning to try it ....d0409.......these options enable the various shift pattern modes within the PCM.
Note: J1 is the 'BLUE' connector on the PCM.
Switch types used must be momentary connect to ground.

'No Switch' = Performance mode via a switch is not functional.
'One Switch' = Performance mode via a switch can be activated (J1 - pin71).
'Two Switches' = Performance mode via a switch can be activated (J1 - pin71), and Manual Mode can be activated (J1 - pin31).
'C2 Data Bus' = Shift pattern modes are sent on the data bus to the PCM from another module, eg - BCM.

Only the following values may be entered into this table:
- No Switch
- One Switch
- Two Switches
- C2 Data Bus

So if I used one switch, I could switch between normal and performance mode and run 2 differnt shift modes on my camaro?

[Doc]

Yes I do believe you are on the right track. I think it would be like the "Tow/Haul" mode on a Silverado.

[minytrker]

Cool, thats what Im looking for. I want to do a street n/a setup and strip n2o setup. I will have to try it out in the next few weeks when I get the car finished hopefully.

[Treurentner]

Hi,

thats very interesting info for the later OS. But how to activate the performance mode tables on the 97/98 PCM under OS #9352031 (97th vette).
The tables are already there but how to switch them on?
In the cal is no D0409...

Marco

[Redline Motorsports]

When I was dabbling with the Predator, James at RWTD said he could create a tune to keep the transmission in third gear (1:1) for dyno runs.

Can I do the same by just using the bidirectional controls on the dyno?

Get the drum rolling, let it get to third, then lock it in third with the Bi-Dir; do the pull, then unlock it?

I do that all the time when pulling a A4 on the dyno. I get the car into 3rd gear, select 3rd gear and also lock up the converter. make the pull and deactivate the TC and deselect the gear.

Howard