Vibration only in 4h at highway speeds.

Driver side axel was just replace. Front dif oil was replaced at the same time and nothing looked bad.
Also ECGS was installed.

 

I still have this vibration...
285/70/r17 summer wheels properly balance and 285/75/r16 winter wheels properly balanced...

WTF is going ooooooonnn

 

I had this problem for awhile. I kept using advanced autoparts cv axels (I kept going through them with a 3" spacer lift). I eventually put in a diff drop and switched to NAPA cv axels and it went away. I have not had a problem since, could be coincidently.

 

Operator error.

4X4 vehicles aren't designed to be driven at highway speeds while in 4X4. Stop doing that and the vibration goes away, and you will stop wearing out parts and having to replace them. You have a 4X4, not an AWD vehicle. They don't work the same.

Despite previous inaccurate posts all 4 wheels get power when in 4X4. An open diff will allow one wheel on each axle to coast in certain situations and not get power. When people see a truck that is stuck in mud, they only see one wheel on each axle getting power and assume it is that way all of the time. It isn't.

All 4 of them are getting power right up to the point where it gets stuck. Having a locking diff may make the difference and get you through, but it is just as likely to get you stuck worse in mud or snow. A locking diff is most useful when in situations where one wheel on that axle is either off the ground, or almost so. When that happens the diff only sends power to the wheel with no traction.

When you are driving on any surface slight curves or irregularities in the road, even small dips or humps will cause each of the 4 wheels to turn at slightly different speeds because they are all taking a different route to get where you're going. An open diff, on just one drive axle allows them turn at different speeds. But when you are in 4X4 you are forcing the front and rear axle to turn at the same speed. The open diff's will allow one wheel on each axle to turn at different speeds. But you will have one front, and one rear wheel being forced to turn at the same speed, even though they are all traveling a different route. This is causing your front and rear axles to constantly fight each other. Creating vibrations and wearing out axles, U-joints and even transfer cases.

Lifts, and oversize tires magnify the issue and make it more severe. I'm not opposed to doing that. You just have to accept the fact that if you're gonna play, you're gonna pay for parts that wear out sooner than stock.

You don't notice the vibration at slow speeds, especially on a surface that will allow some wheel slippage to account for wheels turning at the same speed yet taking a different path. If it is safe for you to drive over 20-25 mph, you don't need to be in 4X4. If you want to drive at highway speeds buy an AWD vehicle. Some trucks and SUV's have systems that use both. You can use AWD on pavement, light snow or mild off-road conditions then switch to true 4X4 as conditions get worse.

Vehicles with AWD send power to all 4 wheels, but they use a more expensive complex systems to do that and still allow each of them to turn at different speeds without wearing out parts. The 4X4 system in your truck is the same dumb system that has been used for over 100 years. It is cheaper, and very effective if used properly. But too many guys don't understand the difference.

And they are axles, not axels.

 

Thanks for the recommendation!

I found the fix. I had to put it in 4LO with my rear dif locked. There are no more vibrations at highway speeds but the engine is almost at red line... I guess I will just need to fill up more often!!

 

Where in Muryca do you live?