I have searched the forum and could not find anything specific to this. Over the last few weeks, I have noticed a pretty high pitched squeaking sound at different highway speeds. It is coming from underneath the H3 and was first noticed at slow speed when putting power to the rear wheels just driving around town. I am now hearing it at highway speed intermittently. My first thought was the right rear wheel/hub assembly because it does seem to come from the right rear, so as soon as I heard the sound, I immediately shifted into neutral and the sound went away. As soon as I put it back in drive and hit the gas pedal, it came back (did this at 55mph). It sounds like rear end issues or driveshaft.

Any ideas?

 

it reminds me of dried out u joint needle bearings.


even at a crawl they will squeak.

 

I had a squeak coming from the rear a couple of years ago, and then when my friend bought his H3 he had the same noise I found it on mine suggested it to him and it was the jack squeaking away in the rear door.
Just because you hear it under power and not when you slip the tranny into neutral would eliminate the jack, Open it up, move it around and tighten it up.
Go for a ride. I hope that is your problem and nothing more involved. Good luck.

 

I've had the squeaky noise in the back, it was the jack.

 

It could be as simple as the wheel bearing. Wheel bearing noise isnt always constant. Check that first. Or a garage might try to replace alot more. These trucks are bad for wheel bearings. Oh! And everything else too.

 

simply not true, made up.

 

check the sway bar bushings

 

I had the same problem, ended up being the rear u-joint. EASY FIX!

 

Thanks for the input guys...it was the rear u-joint on the drive shaft. The front one was heading south too, so I replaced both of them. Much better now.

 

so, do the things have grease fittings? I never looked and the mess outside, well you know!, anyone know?
I rear some new veh take a needle thru rubber type grease method.