Loud clunk noise when backing up. It's loudest when it's wet out. It started after rear brakes were replaced.

2400 a 2500? seems so.
find a real ASE shop, and win.
yes clunks never just go away, they get worse as the wear accelerates..(like slugging wall hard each day hurts more )
due to velocity is faster for more wear (traveled, and goes worse FASTer) aka as doomed, wise is not going to far like this.

REAR: 101:" I use an electronic stethoscope to find mine.
rear clunks,. I've had them all in 60 years driving! you name it.bing.
no miles on truck told mine was 2004 1500(5speed m/t)
I used to restore 4wd cars as 2nd job. (for years) I am a gear head.
I had 4 bay shop on my property. upto 2009

• bad U-joints !
• bad brakes rear.
• bad emg, brakes top hats bat, gee.
• bad axle bearing , I just fixed, 5 years ago.

the microphone (my tool) clamped to axle 3 places, 4 channels mic.
left rear , center and right rear
the right is 10x louder.
so I , remove the whole real brake assembly. and bingo bad brakes seen. or in 2nd case all that is good but if I man handle the axle end with my trusty lever (crow bar) I SEE ILLEGALL play in the AXLE bearing it 3 planes, in and out and up and down and forward read.
I also man handle THe Ujoint, no play at all allowed L/R/Top down
or other suspension parts bad in rear
a real ASE shop levels all that in and find excessive play or even makes the noise doing so.
I can drive or buddy does and my head phones on and 4 channel knob, and can hear the noise. them move mics to hone in to loudest spot. this method avoids injury. finding any noise on a moving car
did you do the safe jump on bumber test, left and right rear.
trucks are easy.
real bumper pickup truck 2500 I guess.
jump it hard even 2 mean or one fat LOL. hard
CLUNK>?or push hard hands on one side of rear fleet side. rear. end. and see if transverse bar CLUNKS.
or take car to a body shop that does body and suspension work
and watch the magic tests. the first. lots or what is called man handing and levering and visual inspections first. and brakes too. rear.
and the drive shaft (aka prop shaft)
there are even youtube showing how to lever parts even with a 2by4
to find parts bad, easy. in suspension or the drive shaft.
on stands or lifts./

NOISE is complex topic and noise can be telegraphed.
fooling even the best techs. anyone..

Loud Noise Unknown Origin - Ask the GM Technician - GM-Trucks.com

www.gm-trucks.com > ... > Ask the GM Technician

Jun 30, 2006 - 7 posts - ‎3 authors
I get a loud clunking, grinding noise while turning to the right only, and ... I moved the passenger side tire to the rear driver side just in case it ...

can bad wheel bearing/hub cause loud clunking noises?

www.jeepsunlimited.com/.../showthread.php?...loud-clunking-noises

Nov 12, 2009 - 14 posts - ‎6 authors
driving home, i noticed some metal clunking sounds coming from the front driversside. at ... hmmmm....if it's grinding, then probably a bearing.

Front Clunking sound when driving straight. - TDIClub Forums

forums.tdiclub.com > ... > VW MKIII-A3/B4 TDIs

Dec 21, 2011 - I have a sporadic clunking noise from the drivers side front end. '98 jetta ... If I try to coast it gets really louder and more pronounced. ... whirring orgrinding could be several things: wheel bearing, brake pads due to a caliper ...

Quick Guide to Diagnosing Differential & Driveline Noises ...

rear brakes are sticking get it serviced

I would tend to believe it's more likely a worn sway bar bushing or link if it's a rattle or a small clunk, if it's a loud clunk probably a strut, try bouncing he back of the car when parked, if you get the clunk probably a strut if only when driving,turning,braking probably just a bushing on the sway bar

Check your universal u joints.

check the sway bar links

Three things: Either the rear brakes are releasing, causing a clunk, try service and adjust rear brakes. If not, go to the drive shaft, check the u-joints and/or jack up the rear of the truck and rotate your tires by hand to see if there is a clunk in the rear end itself.

a clunking clanging noise sounds very much like your stabilizer bar end links and bushings. you have a thin rear "sway" bar on the rear of your odyssey. this can cause a whole lot of noise. grab each side and pull/push. if it feals loose, replace the end links and bushings.

have ya,ll checked the rear differetial fluid level.if u have an need more help feel free to email me at [email protected]

it would not hurt to check rear tire wear due to misalignment
cupped tires will cause a faulty bearing type noise or humming.