Growling noise

[hottpotato65]

i shall............ thanks for the Beta

 

[hottpotato65]

[PROBLEM NUMBER ONE]okay we jacked the truck up all the way around(all four wheels off the ground) and engaged the 4 wheel drive hi took the truck up to 40 mph- rear wheels spin -left front wheel spins(drivers side wheel does not spin but tries to) engaged truck into 4 wheel low took truck up to 25 mph and same effect-only three wheels spin-drivers side tries to but does not---i figure the vacuum hub is not engaging on the driver side
[PROBLEM NUMBER TWO] when the three wheels were spinning there was no growling/vibration/hum only sound of wheels freely spinning slightly out of balance.
when trying to determine if there was play in front wheel bearings after grabbing at 12 and 6 o'clock i cannot detect any play at all plus the wheels do not spin freely,feels if brakes are ever so slightly engaged(ABS symptoms ?)

[Question 1 ]so is the severe humming/vibration noise a symptom of a wheel bearing ready to fail yet has not failed?
[2] found receipt for Right Front(passenger side) hub assembly was replaced by garage last year... drivers side was not replaced-previous owner did not disclose the repair-where di i go from here?????????????????????

 

[crusin93]

Answer to 1- Yes. You have successfully demonstrated that by taking the weight off the wheels, the noise stops.
Answer to 2- You need to find why the right front is not engaging. Most likely a poor job by repair facility. They may have torn an o-ring while servicing hub. Now it won't hold vacuum. You will need to manualy introduce vacuum into the hub. See that the gauge holds steady for a minute.

 

[hottpotato65]

drivers side does not engage(left side)i will attempt to pull off the vacuum hub clean and replace o-rings but what about the humming noise/vibration with speed?