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Mark944na86's Avatar
Join Date: Mar 2005
Location: Brisbane, Australia (Formerly: Sunnyvale, CA)
Posts: 190
Strange torque tube problem

Anyone seen anything like this? When I was under the car, I noticed that there was a split in the torque tube casing, which looks like it had been patched at some stage with some muffler repair material (?) (hard to know exactly what it is but it is like a metallic tape, about 0.5mm thick.) You can see the width of the silver tape running up the torque tube, and the split showing through the repair again, some rust on the edges.

Obviously, at the very least I have to get this sealed again so that road grit doesn't get into the bearings, but it beats me what might be the cause of the damage in the first place. It's far too high up to be caused by driving over something, for example; there would be no exhaust system left, and extensive underbody damage. Are the tube casings ever known to corrode from inside, due to water that gets trapped in there and sits, for example?

Anyway, any ideas or tips on what might have caused this/what to do about this appreciated. The tube isn't making any unusual noise at this stage. (Sorry about the picture quality; the flash at close range can saturate things a bit, lowering the contrast.)

Currently 1990 944 S2, Black on Linen, 17" Turbo Twists

Last edited by Mark944na86; 04-10-2005 at 07:15 AM..
Old 04-10-2005, 06:42 AM
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ae1969's Avatar
Join Date: Jul 2001
Location: Edmonton, Alberta, Canada
Posts: 4,530
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That is a first for me..............

You are saying you can see the shaft inside. Could be rust but frankly that is amazing. Unless this car has been sitting in a pool of water all its life.

........and if you hit something to cause that damage........... you would WAY more damage than that...........
Alex - PCA Polar Region - Boxster Muncher
86' 944 Turbo - Megasquirt - 326 rwhp/340lbft @ 18 psi SOLD
Old 04-10-2005, 07:21 AM
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Join Date: Mar 2004
Location: Leesburg, Georgia, USA
Posts: 1,567
The split in the TT is normal. When I rebuilt mine, I sealed the split with some silicone sealant and put aluminum tape as back up.
I agree with you that water will get in there and rust will destroy the TT bearings.
I used rubber sealed bearings when I rebuilt the TT as an extra protection because the original bearings were metal shielded.
1993 964 C2 still makes me smile
1996 318ti (280k miles)
2011 Silverado for hauling (32k miles) - SOLD
2018 Suburban Z71
Old 04-10-2005, 07:28 AM
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