RedTwo
Well-known member
Skylines have a hydraulic drive gear that is electronically controlled (4WD ECU)
Pull fuse = cut power
Cut power to 4WD ECU = RWD.
And for those of you who want to know more allow me to elaborate:
Ahem...
Starting with the R32 series Nissan introduced the ATTESSA-ETS (Advanced Total Traction Engineering System for All-Terrain - Electronic Torque Split) version of their ATTESSA system (as fitted to their U12 Bluebirds and Pulsars).
The normal ATTESSA has a viscous center diff feeding into a transfer case in a traditional FWD/Transverse arrangement. ATTESSA-ETS allows the RWD/Longitudinal fitment on Skylines to be converted to 4WD by adding a transfer case in between the gearbox and the driveshaft. The transfer case holds a chain driven clutch pack (in essence the center diff) fitted to a front driveshaft which runs, parallel, along the outside of the gearbox, through the bell housing and into the front viscous LSD diff under the sump. The rear diff has an electric high pressure oil pump that feeds pressurized (up to 290 psi) transmission fluid into the transfer case. The greater the oil pressure in the transfer case, the tighter the clutch pack is compressed and the greater the drive (up to 50% of total driving force) given to the front diff. This is then split with the front LSD to each front wheel evenly.
The ETS ECU uses the ABS sensors and a G-sensor in the cockpit to detect wheel spin/loss of traction in each wheel, checking roughly 10 times a second, and adjusts the diff pumps output (pressure) to increase front drive and grip. The system is set from the factory to produce slight oversteer (meaning the harder the cornering the less front drive is applied) rather than understeer apparent in normal 4WD cars.
Shutting down the ETS ECU will prevent the rear diff oil pump from operating and increasing the drive to the front wheels. The two common methods of doing this are ATTESSA-ETC/4WD fuse pull or rolling shut down.
The fuse pull is self explanitory, either perminately remove the ETS fuse or fit a toggle switch into the ETS wiring. Rolling shut down involves completely turning off a car while it is still moving, waiting a few seconds and restarting it. The car will be RWD until the wheels stop turning. Which just sounds like a damn stupid way to do things if you ask me.
Pull fuse = cut power
Cut power to 4WD ECU = RWD.
And for those of you who want to know more allow me to elaborate:
Ahem...
Starting with the R32 series Nissan introduced the ATTESSA-ETS (Advanced Total Traction Engineering System for All-Terrain - Electronic Torque Split) version of their ATTESSA system (as fitted to their U12 Bluebirds and Pulsars).
The normal ATTESSA has a viscous center diff feeding into a transfer case in a traditional FWD/Transverse arrangement. ATTESSA-ETS allows the RWD/Longitudinal fitment on Skylines to be converted to 4WD by adding a transfer case in between the gearbox and the driveshaft. The transfer case holds a chain driven clutch pack (in essence the center diff) fitted to a front driveshaft which runs, parallel, along the outside of the gearbox, through the bell housing and into the front viscous LSD diff under the sump. The rear diff has an electric high pressure oil pump that feeds pressurized (up to 290 psi) transmission fluid into the transfer case. The greater the oil pressure in the transfer case, the tighter the clutch pack is compressed and the greater the drive (up to 50% of total driving force) given to the front diff. This is then split with the front LSD to each front wheel evenly.
The ETS ECU uses the ABS sensors and a G-sensor in the cockpit to detect wheel spin/loss of traction in each wheel, checking roughly 10 times a second, and adjusts the diff pumps output (pressure) to increase front drive and grip. The system is set from the factory to produce slight oversteer (meaning the harder the cornering the less front drive is applied) rather than understeer apparent in normal 4WD cars.
Shutting down the ETS ECU will prevent the rear diff oil pump from operating and increasing the drive to the front wheels. The two common methods of doing this are ATTESSA-ETC/4WD fuse pull or rolling shut down.
The fuse pull is self explanitory, either perminately remove the ETS fuse or fit a toggle switch into the ETS wiring. Rolling shut down involves completely turning off a car while it is still moving, waiting a few seconds and restarting it. The car will be RWD until the wheels stop turning. Which just sounds like a damn stupid way to do things if you ask me.
