A few snippets out of the 06 FSM....
Section 8E-139
Quote:
Electronic Pinion Factor - On vehicles without the optional Antilock Brake System (ABS) the BCM provides a source voltage to the rear wheel speed sensor and monitors a returned vehicle speed signal input. The BCM is able to use the vehicle speed signal input to accurately calculate vehicle speed and distance information by applying an electronic pinion factor. This factor is based upon either a pre-programmed tire size or a Tire Rev- olutions per Mile (TIRE REV/MILE) value that compensates for multiple optional axle ratios and tire diameters. The correct electronic pinion factor must be programmed into the BCM using a diagnostic scan tool in order for the vehicle speed and distance information to be accurate. The BCM then transmits the correct vehicle speed information over the PCI data bus for use by the EMIC for control of the speedometer and odometer.
I have ABS... so I am assuming I can't use this "flash" to utilize the rear wheel speed sensor?
Section 8E - 142 ELECTRONIC CONTROL MODULES KJ
Quote:
INPUT AND OUTPUT CIRCUITS HARD WIRED INPUTS
The hard wired inputs to the BCM include the following:
[edited to illustrate the point]
• Vehicle speed signal
Hmmm.... dunno if I am reading into this right... I have never really been good with the FSM stuff... it gets into refering to CAN data....
06 KJ Sport: you might be better than Okay as you have sourced your rear axle off of a KJ... I plan on keeping my 8.25 should/when I go SFA... if I am reading the above quotes out of the FSM... does that mean that I need to get my hands on a ECM out of a 2006 6-speed manual... non ABS? Or would disconnecting the front wheel speed sensors cause my libby to revert to the rear WSS's only for the vehicle speed/distance?
Either way... I think I have sourced a HP D30 with 3.55's (which according to one link I found) is what I am sitting on with my KJ being a 6-speed manual sport... (Yeah, I know 3.55's will suck on bigger tires, but I am going for the super budget up front cost on my SFA... as much custom fab as I can.... just get it SFA'ed then worry about gears, lockers, chromolly kit, etc I'm planning on keeping the initial build as frugal as I can while getting quality springs, shocks, driveshafts, etc.... I can always throw a locker gears and chromolly shafts at a D30, but I don't want to get into replacing shocks, and fabbing up new control arms all the time....
Any updates on this SFA? It's been a few weeks....
Mark