Quote:
Originally Posted by lazer
Well at first I was driving with the fuse out. and then when I put the fuse in there the car was still only driving in front wheel drive.
So the only difference between having the fuse in and out is the diflock light in the dash. Still only fwd. About my rewire. I did change the internal loom in the transmission as the speedsensor 2 feeds 2 more wires to the transmission connector.
In theory could I run current to the difflock solenoid in the rear to lock the diff up?? What kind of signal does this solenoid get??
If I could run 12v to the solenoid to engage this then I can check that the difflock actualy works. in the tranny
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Martin,
I
think I know what you are asking, and I'm wondering if you read my reply above to Dave?
Unless you bought a gearbox from a Twin Turbo Legacy, there is a 10:1 likelihood that you have purchased the US type 4EAT, which is the electrical rear assist type.
The software in the transmission controller in the SVX varies the torque to the axles depending on conditions. Normal or default is 35% Front, 65% Rear, and in loss of traction conditions at the back varying frontwards to 50/50. All controlled through the gearbox by the gearbox computer[TCU].
In the transmission controller for the US type [which I think you have] normal torque split is
90% Front and
10% rear. This is varied by the computer manipulating the solenoid and making torque split up to 50/50, this time if the Front wheels slip or lose traction.
You can see these are fundamentally different programmes. For that reason I think it is possible the SVX TCU [controller] that you have may not be able to vary torque split for the US type rear assist gearbox you have just installed. I could be wrong about this, but that is what I suspect.
You say you drove it with the fuse out. In this position, assuming the rear drive is activated at all, you should be getting 90 Front/10 Rear split in the default position. All of this assumes you now have what Subaru calls the Active Torque Split AWD gearbox from a Legacy, the USA type and the rear control solenoid is powered up.
Your problem here is torque distribution, rather than diff lock. If you put the fuse IN now with your current Legacy gearbox, this in theory will turn it 100% Front drive, no power to the back. Or it will if the signal goes the same path the Legacy box requires [unlikely?]
However, if you put the fuse in with the SVX box wired in, this locks the diffs at 50/50. Your rear drive using the Legacy box may be getting no power at all right now because the software in the TCU is not set up to control it. If the fuse locks anything at all in your current set-up, it would possibly be locking it to 90/10, but my guess is the signal from this fuse is only lighting up the dash light, but doing nothing at the gearbox.
If you want to persist with this Legacy transmission, I suggest the easiest way to make it work properly is to get a US style TCU to control the box.
Otherwise go for the manual or buy the correct SVX style Euro gearbox that your TCU controller is programmed to operate.
Joe