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Old 01-15-2008, 07:35 PM
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Join Date: Dec 2007
Posts: 12
1979 240d AT rear output seal BAD questions

I just Purchased a 79 240d and the rear seal on the transmission is bad(blown out) Does anyone know the size of the spindle nut that holds the yolk on? Also Advance does not carry the seal, does anyone know where I can get one?

Are there seals in the drive shaft itself, and what are they for?

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Old 01-16-2008, 02:19 AM
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Join Date: Dec 2002
Location: Colleyville, Texas
Posts: 2,694
The seal is available here at fastlane. Click on the button at the top that says "buy parts". If their out you can get it at the dealer.

Now for you rear seal nut. If the tranny has been serviced within the last 10 years is uses a 12 point deep socket, if not then it uses a castle socket.
You will have to look at the nut to determine which socket.
Here is my post on R+R the seal on my daughters 240D.

Working on the cars today, to many cars

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
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Old 01-16-2008, 09:42 AM
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Join Date: Dec 2007
Posts: 12
I know that I have the castle nut on mine, do you remember the size? And do you remember if the new nut comes wih the seal?

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Old 01-16-2008, 08:37 PM
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Join Date: Nov 2007
Posts: 30
If its anything like a 77 240d at you will need a mean puller to get the yoke off. If anyone cares its the same spline as a TH350 chevy.
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