I just started to notice a noise in the rear. It ONLY happens between 20 and 25 mph. Always under acceleration. It seems to be coming from the rear of the car and you can feel it as well as hear it. I took a quick peek at the rear flex disc and it looked OK. I had it out for a highway trip (400 miles) and averaged about 65-70 mph with no noises. Only happens between 20-25 mph.

Is it my rear going or flex discs?

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R

have you checked you sway bar links i had lots of clunking from the back everytime i went over a bump. they are about $6-$10 each from ********

Or $15 for the pair at the dealer.

This was one of those parts that it just didn't make sense to order and wait for. There really are a few parts that this is true for

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http://i68.photobucket.com/albums/i1...Untitled-1.jpg

definately not that. I replaced those about 2 years ago. This is a noise that happens only on acceleration, not as I go over bumps.

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R

is the noise sort of a vibration? I get a rumbling vibration that you can feel when I really stand on it at about 25mph, and I have no clue what it is... sorry to leech off your thread.

I had that and it was my axel. Is your boot torn?

I second kdvrwgn's idea, as this was my initial thought upon reading your post, too. Before I replaced the half-shafts on my '85, I was getting a popping/clunking noise, which *at first* was apparent only when speeding up or slowing down. Later, it became more pronounced, especially when exiting the freeway, etc.

Good luck, -Chris

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Christopher
'06 Mercedes E350 station wagon (silver/black)
'85 Mercedes 300D (black pearl/palomino)
'85 Mercedes 300SD (smoke silver/burgundy)
'79 Cadillac Sedan DeVille

'05 Toyota Camry (because always running is nice)

'85 Mercedes 300D sold back to orig. owner 8-1-06
'84 Volvo 264GL Diesel, owned 2000-2013

my 87 300d had a klunk when shifting 2-3 ,sounded like rearend , checked everything in rear, o k . replaced trans mount , noises are gone

mike d

check the two bushings on the back of the rear end. I had a clunk at the shift from first to second gear. The rear bushings ended up being shot. Replaced and no clunk.

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Owen

87 300TD 603 I-6
94 Jeep XJ I-6 4.0 (see the pattern)
89 750il
seventy-two hundred feet above sea level (kinda cold up here)