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#1
11-17-2007, 09:24 AM
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Quote:
The support bearing is pressed into place and basiacally just keeps the stub ends of the shafts aligned and isn't intended to contain the radial forces generated when a flex disk decides to take a hike. The cut in that tunnel was made by the spider end of the stub shaft sawing it's way through like a skil saw.
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Never a dull moment at Berry Hill Farm. 
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#2
12-08-2007, 12:46 PM
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Quote:
 As in, never tow an MB very fast with the fwd section of the driveshaft out.
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 1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car"
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#3
12-09-2007, 11:48 AM
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I am not sure I am picturing what you are saying, but it looks to me as if the car could have been driven a long time with just part of the flex disc flailing. It also is possible that the car picked up a foreign object that got caught there and flailed about.
I agree it is tough to imagine the end of the ds coming loose with the spikot thing stuck in the back of the output shaft of the tranny. I think if it were the spider doing the flailing it would be a bigger hole, too. On my 190c fintail back in the seventies I once drove it til the flex joint had holes in the rubber donut around the bolt holes that nearly touched. It really didn't vibrate horribly but on take off and slowdown you could feel the slack being taken up. Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#4
12-09-2007, 11:58 AM
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Driving around with a piece of the flex joint flailing around sounds even worse than a sudden failure
I don't think they drove it for long (notice the clean edges, no rust) but that bulge/dent was about an inch wide. The key thing about it was the fact they just threw some new carpet over it and was on their merry way.
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#5
12-13-2011, 11:22 AM
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Thats NOTHING!!! I was driving down i80 doing about 80mph in my 87 300E and the flex disc broke which triggered the airbag to deploy in my face and knock my hands off the steering wheel
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1969 230 inline 6 dual carb 60,000 Miles 2nd Owner doesn't run right 1982 300 SD 455K - my reliable commuter car  1990 190E needs new crank shaft  ran it out of oil1996 C220 bad wiring harness
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#6
12-14-2011, 06:50 AM
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Your air bag sensor is on the tunnel,no wonder it went off.
I did a diff for a customer recently who had swapped in Used diff...which ripped it's crown wheel apart. The reason the diff was changed in the first place was because the owner heard a noise and his alleged ( former) mechanic told him the diff had gone. It wasn't the diff making the noise but the flex disc,just like the first one in the thread. It was in a 6.3 which eat discs anyway. As he coasted down a hill on a city street,the flex disc came apart completely and took the rear of the gearbox out,plus the crossmember and the shifter rod The drive shaft then hit the road and bent backwards taking out the center bearing. The speedo cable was ripped out the housing. He repaired it all himself .Luckily the finny uses the same rear housing etc on the tranny so it only cost a few dollars to replace things. Then the diff went..
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