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Old 04-18-2012, 02:45 PM
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Join Date: Apr 2002
Location: Dallas Area
Posts: 400
Driveshaft balancing

I am converting my 300E to a manual. I have the front half of the driveshaft from the manual transmission and will be using the rear half from the existing car. Per EPC, the rear half's are the same on the manual and auto vehicles.

Anyone know of a good place in the Dallas/Fort Worth area that balances drive shafts?

1986 300E (3/2002) Rear ended and totaled (10/2009)
2000 Xterra (5/2000)
1992 400E (11/2009) -Sold
1986 300E (12/2009) - Sold
2004 E500 Wagon (6/2013) - Sold
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Old 04-20-2012, 12:21 PM
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Join Date: Apr 2005
Location: Cicero, Hamilton County, Indiana about 30 miles north of downtown Indianapolis
Posts: 2,621
I would gamble on it and use it as is. If it is way wrong it will show up in a hurry. Was the car very smooth in operation all the way around? Tires near perfect balance, ect? I would go with it. It is not fun, but not really difficult to pull it out if it turns out wrong and then I would get both of them balanced. My 300E 5 speed is incredibly smooth. I am sure I could take it way past 100 mph and it would still be smooth. If the drive shaft has the balance marks on it like the W123 has on the late model ones, be sure you line the marks up.
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis

1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!
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Old 04-21-2012, 12:45 PM
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Join Date: Jul 2011
Posts: 90
The factory propshaft has balance marks on it. One half has two triangle bosses near the centre bearing u/j and the other half has one triangular boss on it. The factory manual says that the shaft will be balanced as long as the single boss is aligned between the pair. I reassembled our 300E's shaft that way and it did not vibrate.
There is a factory test in Germany that specifies no vibration while accelerating between 80mph and 120 mph - it isn't feasible in the UK, of course.

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