is getting the shifter all the over to reverse nornally so hard? I've never driven a 6 speed but it seems to take a fair amount of pressure to get it to shift over to put it into reverse. I have a 2002 LS1/T56 combo. From what I've gathered from other threads is that the cpu controls the soleniod and should not have to do anything to it. So in theory it should be working. So I guess another quesiton would be how can you tell if the solenoid is working?


This is going into a 1969 camaro is that matters and I have the stock cpu/motor/tranny from a 2002 camaro.

 

The PCM does control the solenoid. Any time the speed sensor is at zero, and the PCM is powered up, it will retract the solenoid and make it easier to get into reverse. If you know someone nearby with a good scantool (one with bidirectional controls, like a GM Tech-II or EFILive) have them plug into the car and manually switch the reverse lockout on and off.

Another possibility, is if its only difficult while the engine is running (vs. key on, engine NOT running), the clutch could be dragging slightly, making it harder to engage.

 

thanks for the replies. just to clarify, once the shifter is moved over it'll drop right in to 6th, so that part is ok, its just moving it over seems really stiff. I'll see if I can get a hold of a scan tool.

thanks

 

Yeah, the lockout isn't opening. Eithor you don't have a hot circuit going to it (I used the O2 heater circuit in my truck) or you don't have the ground circuit hooked up to the PCM. It is also possible that the PCM isn't flashed for a 6 speed, but there are a bunch of other issues that would occur if that were the case.

 

ah ok, I didnt realize there was more wiring invloved for it. I'll check my diagram and wire it up, I'm sure thats what it is. (I made my own wiring harness). Also something Brains said above about the pressure being different when the cpu is powered vs not powered. Currently, my has the same stiff pressure with the ignition on or off.

thanks again

 

ok, I checked the diagram and actually I think it may actually be hooked up, I'm not near the car to verify but I believe I hooked up all the pink wires (especially S104 since that is also connected to the mass air flow sensor) and the ground was already hooked up(I'll verify tonight when I get home). However, looking at the diagram, there is also a "(on brake pedal bracket) stop lamp switch". This I know is not hooked up, does this need to be? Does the reverse soleniod only disengage when the brakes are depressed?

 

If all else fails, grab a new shifter **** with a button. Wire it up to the solenoid. It will let you into reverse when you want it to... Thats what Im donig with mine. But then again...the car that I pulled my combo out of was a 6spd swap car. So the reverse solenoid wiring wasnt integrated into the A4 harness. So isntead of running new wires to the pcm to make it work...Im just using a hurst classic 6spd ball with a button on the side. Not in a position to get hit accidentally...and its going to double as my line lock momentary switch. Just another idea. I have mind hooked up to the cig lighter wire. In my 87 thats hot all the time in case i want it in reverse without the key on.

Justin

 

the pink wire should be hooked to power(rear o2 sensor). the green wire should go to pin 44 on the C2 harness. if it has the same resistance with ignition on or off. then the solenoid isn't getting powered. the computer provides a ground to the solenoid when you are below a certain speed. the solenoid is an inhibitor switch. so without that power it won't let you push over towards reverse without forcing it.

 

Thanks for all the help, it indeed was not getting any juice which is why it wasn't working. I in fact did not have S104 connected to +12v ign which means the MAF was also not functioning, which is odd cause I had started it a few times and never noticed anything. Anyways, all is well now and on to the next part.

thanks

 

Glad you figured it out.

 

GM PCM's have full speed density calibrations loaded as well as MAF cals, so they'll run without the MAF connected/operational. Ford only seems to load the MAF cal, so it'll die without it.