TCM electronics

[rustynuts]

Originally Posted by Richard buttocks

98 up is different.

another reason pre updates are better

OK. I am hearing you.

[Richard buttocks]

98 up has a different speed sensor and has 2 of them.
cable is just the firmness of the gear change.

[awg]

Originally Posted by rustynuts

Well I am a dumbass but I do know my TCM does take inputs from the PCM. Parts of the trans is cable operated from the throttle cable but it will not lock the convertor unless a TPS signal is present. It also likes to know RPM. I have an AW4 book if you get stuck.

agreed one would need to rig a TPS for my application, the speed sensor is within trans, cable must be connected etc etc, many mechanical complications, but mostly already overcome. So what I am hoping is the TCM does the job on its own. This functionality is available from several aftermarket systems, but would prefer to use Jeep stuff, which keeps it on track for this forum, (although the vehicle is a Jaguar 420G), costs 10k+ to get a 4sp auto in one otherwise

Originally Posted by Richard buttocks

Im not your average dumbass.

as a non-average non-dumbass, is your opinion nay or yay on whether TCM can control the trans without a PCM?

[Richard buttocks]

Originally Posted by awg

as a non-average non-dumbass, is your opinion nay or yay on whether TCM can control the trans without a PCM?

Pre update, yes.

[awg]

b4 i forget, found stacks of info on the topic on these threads

http://www.naxja.org/forum/showthread.php?t=24701

http://www.naxja.org/forum/showthrea...&highlight=AW4

some points;

*A340/AW4 output shafts, tailhousings & torque convertors can mix & match (which I need)

*91-96 have TCM electronics that are easy to take control of

* later/other models can work, but want to throw a Warning light (cause they have more integration with ECU)

All that is for another project for the benefit of future seekers.

In the case of XJs, when I get around to it, like to add a "hold 1st gear" function for all ranges, not just 4LO