Hi!
I'd been doing a little searching, and found some information that has helped, but nothing specific to what I'm trying to accomplish.
I'm looking for a way to force a downshift from OD to drive electronically in my 2000 XJ. The way I understand it, that would involve breaking the circuit on the overdrive sense wire to fool the TCU into thinking I'd manually downshifted, but I'm wondering if I'd also need to apply power to the 3 sense wire at the same time or is there already power on it when the shifter is in OD?
I'm not sure if anybody has tried this before, but what I'd like to do is use a microswitch or adjustable vacuum switch to control OD so that I can set it to downshift sooner (1/2 to 3/4 throttle instead of WOT). I'm hoping this will eliminate the yo-yo between 3 and OD I'm seeing on hills by downshifting sooner and staying in drive longer.
Thanks in advance!
Tony
I'd been doing a little searching, and found some information that has helped, but nothing specific to what I'm trying to accomplish.
I'm looking for a way to force a downshift from OD to drive electronically in my 2000 XJ. The way I understand it, that would involve breaking the circuit on the overdrive sense wire to fool the TCU into thinking I'd manually downshifted, but I'm wondering if I'd also need to apply power to the 3 sense wire at the same time or is there already power on it when the shifter is in OD?
I'm not sure if anybody has tried this before, but what I'd like to do is use a microswitch or adjustable vacuum switch to control OD so that I can set it to downshift sooner (1/2 to 3/4 throttle instead of WOT). I'm hoping this will eliminate the yo-yo between 3 and OD I'm seeing on hills by downshifting sooner and staying in drive longer.
Thanks in advance!
Tony