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03-10-2016 #1
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- Jan 2011
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- Brisbane, Qld, Australia
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- 98
Can anyone explain how they have made a G8 / caddy shifter work with a 6l80e?
I have the TU/TD wire coming from the trans. The trans also has 12v power.
I am aware of the speartech tap shift box but thought if its achievable without buying this then that would be great.
Thanks!
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03-10-2016 #2
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- Jan 2011
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- Brisbane, Qld, Australia
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- 98
Seems the aftermarket options (there are several in Australia) use CAM BUS interface to control shifting. Originally BCM appears to have used several resistors as per the attached diagram.
Has anyone attempted to replicate the circuit in the attached? Make your own resistor module to enable use of an OEM shifter?
04-01-2018 #3
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- Dec 2010
- Location
- No. CA
- Posts
- 34
Very informative, current forum link regarding this tap up tap down topic. Sad that this feature cannot be conquered by US programmers and harness builders without sacrificing other features. https://forum.hptuners.com/showthrea...p-shift-no-BCM
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