JLaud
TYF Newbie
First of all I'd like to say this forum has been a wealth of knowledge and a great help to me, been lurking around here for a few weeks now ever since i got my 2003 Tahoe Z71. Used the how to's to do the rear brakes, Intermediate Steering Shaft, DRLs, belts and other misc items.
Went for a drive with the family yesterday up I-70, hit the snow storm and used 4WD. Everything worked great but there seems to be a growling/humming noise like I've got mud tires only when slowing down/coasting between 35 - 25 mph. It's very quiet at all other speeds. This happens whether I'm on the brakes or not, tranny in neutral or drive. It happens in both Auto 4WD and 4Hi mode, and goes away in 2Hi. It's also kinda intermittent, does it only when its warmed up and not when its cold, and there are times when it doesn't do it at all.
Did some research online and the only thing that came up with similar symptoms was unevenly worn tires between the front and back causing the driveline to bind up a bit. My tires aren't the best, they are a bit unevenly worn between the front and the back, figured since its going to be summer I will hold off on buying new tires until the fall.
Truck is very quiet with no noises or sounds in 2Hi or when accelerating in 4Hi or Auto 4Hi. Come to think of it, I've only got 2 strange noises in my truck, this 4WD noise and a noise from the back like a screech or squeal when going over speed bumps or dips. Searching online, most people think this is the slip yoke that needs to be greased. My folks' 03 Suburban makes the rear squeal noise as well.
I got it serviced a week ago and everything checked out, no leaks underneath and the CV axles look good.
Sorry for the long winded post, figured I'd give you guys as much info as possible. Appreciate the help in advance.
Went for a drive with the family yesterday up I-70, hit the snow storm and used 4WD. Everything worked great but there seems to be a growling/humming noise like I've got mud tires only when slowing down/coasting between 35 - 25 mph. It's very quiet at all other speeds. This happens whether I'm on the brakes or not, tranny in neutral or drive. It happens in both Auto 4WD and 4Hi mode, and goes away in 2Hi. It's also kinda intermittent, does it only when its warmed up and not when its cold, and there are times when it doesn't do it at all.
Did some research online and the only thing that came up with similar symptoms was unevenly worn tires between the front and back causing the driveline to bind up a bit. My tires aren't the best, they are a bit unevenly worn between the front and the back, figured since its going to be summer I will hold off on buying new tires until the fall.
Truck is very quiet with no noises or sounds in 2Hi or when accelerating in 4Hi or Auto 4Hi. Come to think of it, I've only got 2 strange noises in my truck, this 4WD noise and a noise from the back like a screech or squeal when going over speed bumps or dips. Searching online, most people think this is the slip yoke that needs to be greased. My folks' 03 Suburban makes the rear squeal noise as well.
I got it serviced a week ago and everything checked out, no leaks underneath and the CV axles look good.
Sorry for the long winded post, figured I'd give you guys as much info as possible. Appreciate the help in advance.
Last edited: