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rumbling in rear end

I have a high milage 1984 944. I recently started hearing a faint rumbling in the rear end. The banging gets faster the faster I go and it slows down the slower I go. Any ideas on what the problem could be?
Old 05-31-2004, 02:17 PM
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Banging or rumbling?

Many things to consider.

Loose axle nut.

Wheel bearings.

CV joints.

I would try to isolate the noise to one of the sides and jack that side up. Grab the rear wheel top and bottom and rock it in and out. If the wheel is loose pull it off and check if the large nut has come loose. Should have a cotter key through it. A large crescent wrench will tell you if it's loose. Usually torqued to 350 ft lbs.

If it's loose then the bearings are starting to fail and you will need to disassemble the stub axle to check everything. Most of the time it's the outer bearing that rusts up and starts spinning on the stub axle. This leaves a grove in the stub axle requiring it's replacement along with the bearings, spacers and seals. If one side is bad it's best to do the other too. Remember the 350 ft lbs of torque and the cotter pin.

CV's do more of a clatter when they wear. Kind of a clickity clack sound. Louder in one turning direction than the other. Still I would replace all of them if I found one bad.
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Old 05-31-2004, 02:28 PM
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How much is a bearing or rear wheel bearing replacement? Anybody had it done?Thanks
Old 06-10-2004, 01:12 PM
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What year?
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 06-10-2004, 01:31 PM
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Old 06-10-2004, 01:40 PM
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The rear wheel bearings on early cars are the same as the IRS VW (68+ Beetle) bearings. Go to a VW shop and get the German bearings. I believe SKF or Timken is the name. They (IMO) last a lot longer than the aftermarket ones.

there's an inner (roller) and an outer (ball) bearing per side. You'll need the two seals and preferably a seal installer as well.

Anything I missed?
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Old 06-10-2004, 02:30 PM
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Any ideas of price? I also would need them installed Any ideas in CT to get them done?
Old 06-10-2004, 02:48 PM
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$110 in parts, if you bought them yourself. PM fast924S, he lives in CT IIRC and may know of a few places
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83 - 944, daily driver
62 - VW Karmann Ghia, never moving restoration

"Oh Bother," said Pooh, as he chambered another round.
Old 06-10-2004, 03:03 PM
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