growliing noise when decelerating from highway speed

I have a 98 and when slowing from high speed I. Hear a growing noise. I changed front hubs, rear wheel bearings, transfer case fluid to auto track and all u-joints. Any suggestions?

So only happens while braking? Have you checked the pads and rotors?

Narrow it down to front or rear?

Yes I changed front & rear brakes with new calipers on rear...thanx 4 your reply...noise isn't when braking just deceleration ...I'm thinking maybe road noise? Sounds like comming from rear but cant just place it exactly

Just updating ..I. was just wondering if the clutches in transfer case could be sticking? There is no binding when I turn wheels all the way either direction .. I changed to auto track fluid but noise still there when slowing from 65+..kinda sounds like comming from front the more I drive it & noticed a little vibration in floorboard on driver side..any ideas out there? Once I get below 60 sound goes away..wether brakeing or not

You might check the lube levels in the differentials.

Sticking clutches in that transfer case gave a "bump" feel in the seat and floor every 50 ft. or so, on or off the throttle on the '98 I test drove a few years ago. I told them how to address it but being a used car dealer, I doubt they did anything about it.

Thanks Chris..I know rear differential is ok..I changed rear wheel bearings ..but haven't had a chance to check front...will try that...hope it is the fix...thanks again

You might also check the exhaust system to be sure it doesn't come in contact with any body or chassis parts/ hangers with worn out bushings.

Thanx again Chris... exhaust is tight ..I noticed this morn on way 2 work noise seemed to come from left front..since I aleeady changed hub..I wonder if left axle bearing might be making noise..I've had truck since last april & with both hubs making noise never thought of changing axle bearings..( would've been easier while I had hubs out) sound like a possibility?

You have constant velocity joints there also.
You might check that one for looseness, excessive play or wobble.
I have no real experience with them but have seen and heard shot CV joints.
They start clicking just before they bust.

Thats what I. Thought...I'm beginning to think this might be something I will have to live with..truck has just over 200k on it..might just be normal wear and tear..haven't had time to check front differential fluid (been turning cold up here) I have to take in for grease job anyway I'll have them check it while doing u-joints ..I'll keep ya posted on what develops ..doesn't seem to hurting truck...thanx for your input