I like to tinker with things, today I pulled the 4x4/PTU fuse. For those that don't know some members have had their PTU's replaced. After doing so the slip threshold before the AWD/4x4 kicks in has been raised, meaning it allows more slip before the back tires kick in. This has positives and negatives, positive is that fuel economy goes up because the rear end is not getting any power (The awd system can completely disengage meaning the driveshaft isn't moving at all). Negative is with the slip threshold higher when driving in slick surfaces unless un snow or sport mode you will see more tire spin than before.
I pulled the 4x4 fuse on my TH, driving characteristics changed alot. Its actually surprising how much power the rear axle gets in warm dry weather. With the fuse pulled I can spin the tires through most of first gear. From a roll anything below 30kms/h a downshift to first causes a lot of tire spin. Now i didn't do this so I could spin tires, I did so to see if there is a fuel economy gain. I can't report on that until next week when I take a long highway trip.
Try this at your own risk.
It the F10 Fuse (20Amp) in the fuse block under the hood.
Make sure the vehicle is completely off when you remove or install the fuse.
If successful, upon start up you will see "SVC 4WD" in the bottom right corner of the Driver Information Center. The message "4WD system unavailable service required" this only happens at startup.
To return everything back to normal, turn the vehicle off install fuse and start vehicle.
I pulled the 4x4 fuse on my TH, driving characteristics changed alot. Its actually surprising how much power the rear axle gets in warm dry weather. With the fuse pulled I can spin the tires through most of first gear. From a roll anything below 30kms/h a downshift to first causes a lot of tire spin. Now i didn't do this so I could spin tires, I did so to see if there is a fuel economy gain. I can't report on that until next week when I take a long highway trip.
Try this at your own risk.
It the F10 Fuse (20Amp) in the fuse block under the hood.
Make sure the vehicle is completely off when you remove or install the fuse.
If successful, upon start up you will see "SVC 4WD" in the bottom right corner of the Driver Information Center. The message "4WD system unavailable service required" this only happens at startup.
To return everything back to normal, turn the vehicle off install fuse and start vehicle.
