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Loosening the large nut allows the drive shaft to separate. A front piece and a rear piece. The splines that are talked about are how the drive shaft attaches. One is larger than the other and the smaller slides into the larger one vie splines or front to rear grooves that prevent the front and rear shafts from rotating while installed.
When the driveshaft is made it is balanced with weights. If you install the drive shaft not using the same splines then it will be out of balance.
Look at the attached exploded view diagrams and you should be able to figure it out.
So to summarize. Mark the dirve shaft so that you use the same spline holes when assembling the dirve shaft. YOu will have to be accurate 10-20 degrees of rotation.
Picture 1 and 2 are a gas W123 driveshaft. The 3rd picture is the diesel driveshaft. 4th picture the center section exploded view.
Dave
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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car
Last edited by dmorrison; 04-08-2007 at 03:39 PM.
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