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Old 04-02-2008, 09:02 PM
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Join Date: Mar 2008
Posts: 5
leaking transfer case

My 91 E300 4Matic is leaking alot of hydraulic fluid. I drain and change the fluid every 10,000 miles due to a small internal leak. i added 1 quart of MB hydraulic fluid back in december. At the end of February the reservoir was almost empty, I filled it with regular hydraulic fluid. One month later, i filled again, only now the fluid gushes out at highway speeds. I cant see any leaking hoses and the fluid seems to be coming out of the top of the case. has the internal seal totaly failed and the fluid is coming out of the vent or is there a hose on top of the case that I cant see?(or is the transfer case toast?)

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Old 04-03-2008, 08:04 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The clutch pack that engages for 4 wheel operation isn't sealing properly.

A good auto trans repair shop should be able to disassemble & repair that transfer case.

Won't be cheap.
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Old 04-03-2008, 11:42 AM
michael cole's Avatar
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Join Date: Apr 2002
Location: waterloo ontario
Posts: 730
shut down your 4 matic operation by putting in test mode and use ATF instead of hydraulic oil in the system.this will get you thru until the xfer case can be replaced
michael cole 1980 300SD gone now but not forgotten,87tdt,90 300te 4matic 95 e320 wagon
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Old 04-03-2008, 09:02 PM
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Join Date: Mar 2008
Posts: 5
would it be cheaper for me to find a rebuilt or used unit and how much of a job is the changeout for me to do in my garage? Any special tools needed?

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