hotrod_cannit
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- Jan 6, 2019
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Today my 2007 Tahoe (LS 5.3L V8 Flex Fuel) made a horrendous grinding/whining sound as we were driving down the road at about 45-50 mph. It sounded like it was coming from the front left portion of the car. It almost sounds like it's 'free-spinning' on wet pavement, but it's not physically doing that. we pulled over and turned off the car, restarted and put it in drive. When we reached 10mph and the car tried to shift the noise happened again. As I braked the whining/grinding sound slowed and stopped once I stopped. I put the car in reverse and as soon as I did the whining/grinding sounds immediately started without the car moving, my foot still on the brake. We tried driving in 3rd, 2nd, and 1st as well with the same symptoms. I tried to engage the 4wd both hi and lo, and still had the same issues.
I've also been having issues over the last few months with my 4wd engaging when it wants (with the auto 4wd function off and in 2wd), and not engaging when I try to do so. The stabilitrak light comes on and off when it wants, and occasionally I will brake hard or take off quickly and the wheels have made sounds as if they are not quite engaged but 'rubbing' against something as if trying to go into 4wd all of a sudden.
So here's what we've tried so far:
- unplugged the 4wd fuse, the transfer case fuse, the battery, the transfer case wires. All resulted in the same symptoms - no change to the sounds. All have been plugged back in.
* when we unplugged the transfer case wires we put it in drive and with no shifting capabilities we were able to get to 15-20 mph before the noises started...so again, no change. We've plugged those back in
- we replaced the actuator back in October, and it didn't seem to fix the 4wd auto engage issues, but now it sounds as if it may be the culprit....
We trailered it home and chose to push it off onto the drive way for fear of using reverse.
We are capable of doing the labor for the fix, but not sure where to start. Every forum I've looked at isn't quite what we're experiencing, or it's for an older model. So I'm looking for suggestions/experience from anyone who has been in this similar situation.
Currently there are about 170,000 miles on it, and I'm the second owner. I bought it used from a dealer back in 2015, and I haven't had any issues up until late summer 2018.
Any help or direction is appreciated.
I've also been having issues over the last few months with my 4wd engaging when it wants (with the auto 4wd function off and in 2wd), and not engaging when I try to do so. The stabilitrak light comes on and off when it wants, and occasionally I will brake hard or take off quickly and the wheels have made sounds as if they are not quite engaged but 'rubbing' against something as if trying to go into 4wd all of a sudden.
So here's what we've tried so far:
- unplugged the 4wd fuse, the transfer case fuse, the battery, the transfer case wires. All resulted in the same symptoms - no change to the sounds. All have been plugged back in.
* when we unplugged the transfer case wires we put it in drive and with no shifting capabilities we were able to get to 15-20 mph before the noises started...so again, no change. We've plugged those back in
- we replaced the actuator back in October, and it didn't seem to fix the 4wd auto engage issues, but now it sounds as if it may be the culprit....
We trailered it home and chose to push it off onto the drive way for fear of using reverse.
We are capable of doing the labor for the fix, but not sure where to start. Every forum I've looked at isn't quite what we're experiencing, or it's for an older model. So I'm looking for suggestions/experience from anyone who has been in this similar situation.
Currently there are about 170,000 miles on it, and I'm the second owner. I bought it used from a dealer back in 2015, and I haven't had any issues up until late summer 2018.
Any help or direction is appreciated.