Has anyone done an AWD conversion using STS-4 parts? Being from the PNW and the V is my daily driver, the only gripe I have with the car is the lack of AWD. So its come down to keeping the V and converting it to AWD or trading in for an Audi S6 or S7.
When I was swaping out the brakes the other day, I noticed the driveshaft hole through the oil pan and the front bearings are splined which makes me think they are the same as the rear and the same as the STS-4. Looks like the front struts would be in the way front half shafts, but I would think the STS-4 ones would bolt right in.
Do the STS-4 and STS-V share the same trans? I wonder if the AWD drivetrain could handle the torque of the V engine?
So physically, I think it would be a pretty simple conversion with all bolt on parts and no custom fabrication. I would think the dificulty would come with all the electronics. The STS-4 uses the same size tires front and rear which would throw off all the calibrations from the ABS, traction control, active handling, etc. Maybe they could be imported from the STS-4? Do the STS-4s use a separate computer for the transfer case or is it programmed into the PCM?
Back in 2007, a friend of mine was looking at the different STS options and was trying to decide between the V and the 4. He was told that the reason GM didn't offer the V in AWD was the drivetrain couldn't handle the power.
Yeah you would definitely be better off buying an STS4 and putting a turbo on it. You could then swap on the V2 hubs and brakes, and have lots of good wheel options. And then go looking for a V hood and front bumper to complete the look. You would then have an AWD STS that makes more power than the V, and looks just as good. You would likely have to build the transmission also, but i'm sure you could find a shop out there that can do that for you.