- Location
- Rainy side of Washington
Funny thing is, the jeep and yota manual trans are very closely related, the W/G series yota ones are close to an AX5 and the R series are close to an AX15. So you can play some pretty fun mix and match games with parts. It's probably actually more work to stay with the auto (without swapping the entire front half of an A340 in, anyways) than it is to convert to a manual.
87-90 the tach is run off the negative ignition coil lead, so it's 4cyl vs 6cyl specific. 91-96 it's run via the tone ring for the CPS, but it's conditioned by the ECU first (afaik this is because the notches in the flywheel aren't evenly spaced so that the ECU can tell which cylinder is coming up next, which would make the tach waver as the pulse rate changed between cylinders), and the signal is 33.3Hz per 1000rpm indicated. 97 and later, it's one of the many signals that's multiplexed over the CCD data bus.
87-90 the tach is run off the negative ignition coil lead, so it's 4cyl vs 6cyl specific. 91-96 it's run via the tone ring for the CPS, but it's conditioned by the ECU first (afaik this is because the notches in the flywheel aren't evenly spaced so that the ECU can tell which cylinder is coming up next, which would make the tach waver as the pulse rate changed between cylinders), and the signal is 33.3Hz per 1000rpm indicated. 97 and later, it's one of the many signals that's multiplexed over the CCD data bus.