09-15-2015, 09:16 PM
Join Date: Jan 2011
Seems I remember that the normal lockup is a modulated signal that was designed to mask the TC lockup to soften the transition. This would make the actual lockup point difficult to detect. I was told by my transmission guy that the TC lockup should be the last event, this means it goes through the gears using the TC slippage to again soften the shifts and then finally locks up. On the 03 you can turn off the OD which puts you in third gear. Maybe try to hold the speed steady and note your rpm, then turn on the OD. Try to detect the gear change and TC lockup. This should be two events, but as mentioned the lockup is modulated. If nothing else at this point you can calculate rpm to speed change to confirm both events occurred.
On my 46RH TC lockup is just a on/off switch and when the TC locks up it feels like an actual gear change. Just as an example of what a TC lockup can feel like.
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