My 1988 LFX F40 build. (Page 10/68) fieroguru FEB 02, 10:06 AM quote Originally posted by Daryl M: My question is, does needing the BCM cause that many problems? With the BCM, the ECM and the Transmission Control Unit, there is more to mess with, but it should be possible. ABS, SRS, and Traction Control would have to be disabled, but the donor car instruments could be used. The Impala had a 160 mph speedo. That would be cool. The other possible issue I see is the physical size of the tranny. It is bigger than a manual and may require a shoe horn and a big hammer to make it fit. Adding the BCM is just more wiring and other supporting modules. It will take more time and the wiring will be more complicated, but fundamentally not a huge deal. Many people are already adding auxiliary modules for auto sensing head lights, remote door locks, retained accessory power, etc... the BCM allows all those features and more (like newer instrument clusters & newer HVAC control systems). It all depends on which supporting modules you want to add. For the auto swap, you will need feedback from a brake pedal sensor (start circuit, TCC lockup, cruise, etc), and those are now separate modules that feed information directly to the BCM. The BCM collects information from the brake sensor module and sends it to the ECM/TCM through the GM LAN wires. The later model ECMs (and some calibration applications) don't have direct wiring points for some of this sensor information, which is why the BCMs are being required more and more. Tuning out the extra modules not used (like ABS, HVAC, etc) shouldn't be difficult, but might require a specific tuning software. Daryl M FEB 02, 07:23 PM Does the transmission care if traction control is operative? wftb FEB 02, 07:34 PM I have HP tuners. Some things can be simply turned off, other things you just fake out by changing the parameters. My donor car was a manual, so it came with the traction control not turned off but with it set to come on at 10,000 rpm. There are other transmission parameters that were worked around in a similar manner. So this OS (from a 2004 cavalier) was probably used for both automatic and manual equipped cars. HP Tuners has a great website and forum where you can find out exactly what it can do for your vehicle. fieroguru FEB 03, 09:53 AM Generally speaking, traction control uses the ABS sensors on the wheels, vehicle speed from the transmission VSS, the BCM to help send information between modules, and the ECM to adjust timing and override control of the DBW. There are other sensors/modules in play, but those are the main ones. Without the BCM, most swaps will need to go into the traction control and abuse control tables and either zero them out or raise the activation speed/rpm to effectively disable. With the missing input from the wheel sensors, at large throttle openings, the ecm can determine the missing data as wheel slip and intervene by closing the throttle or lowering the timing to reduce power. The available tables and ability to edit information is largely ecm and calibration specific, so you really need to get the ecm, HP Tuners or your tuning package of choice, and see what table are there and your ability to change the values. RacerX11 FEB 04, 04:00 PM quote Originally posted by Will: Hondas V6's have 90 degree bank angles. Given the Miata's engine bay, the narrower bank angle of the LFX probably fits better. Only the older C-series Honda V6's are 90 degree. The J-series are 60 degree, and fit the Miata just fine. RacerX11 FEB 04, 04:05 PM quote Originally posted by msweldon: Will, no plastic intakes for any LLT's, they were introduced on the LFX's and on with the LGX. The later LLT's in the Lambda chassis SUV's used the LFX plastic upper intake with an adapter. Marty msweldon FEB 04, 05:07 PM quote Originally posted by RacerX11: The later LLT's in the Lambda chassis SUV's used the LFX plastic upper intake with an adapter. Marty Thanks for the correction... Will FEB 04, 05:22 PM quote Originally posted by RacerX11: The later LLT's in the Lambda chassis SUV's used the LFX plastic upper intake with an adapter. Marty Oh, snazzy! Daryl M FEB 06, 12:04 AM Ok, time to tap the community mind. I got my 88 in pieces and didn't see it when it had the engine in it. This cable and bracket was hanging in the engine compartment. The other end seems to go to the very front of the console tunnel. It is difficult to see just where, but it appears to be hooked to nothing? Does anyone know what it is ? The car is a 1988 and had an Isuzu transmission in it. Anything else I would tell you would be a guess. Thanks, Daryl Daryl M FEB 06, 01:17 PM I did a test fit this morning just to make sure it is all going to fit. So far I think I'm pretty happy, that is until I find that first thing that I didn't notice.😝