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manofwar 01-07-2002 05:45 PM

4matic, HELP!
Hi, Just new to this, I have a 91' 4matic sedan. When I got it, (cheap) The transfere case has been torn apart, gears sheared outside the case. I finnaly found another transfere case, put it back in, Took a while, the fluid filled up, 4matic light went off, with ABS light comming on every once in a while,

The Problem, Driving, at speed, ALL the wheels lock, and the car skids. Disabled 4matic, and car runs fine. Have tried eveything, Any idea's why ALL the wheels would lock up all at the same time?

Please help, I have absoulty no idea where to start!


91' Mercedes 4matic 300e
85' Maserati biturbo
86' Maserati biturbo 425
73' MGB
90' Volvo 760 Turbo
90' F-150

someguyfromMaryland 01-07-2002 11:14 PM


I don't know how much mechanical and electronic experience you have, but I have owned a '91 4matic wagon for 5 years and do 95% or so of my own work on the car. The 4matic transfer case is one of the components that I would be the MOST reluctant to replace in my own garage. Most independent and factory dealers don't even have anyone with deep 4matic experience.

The transfer case is a known weakness in the 4matic system, the original cases typically don't last past about 75 - 100 k miles. I know many 4matic owners and the common practice is to replace the failed case with a new factory unit. I have heard the new units have improved design. I can only give you my experience. My car had the xfer case replaced with a factory new unit at 75 k miles, and it's working fine at 216 k miles now . (SERIOUS WOOD KNOCKING SOUND) I'm rather obsessive on maintenance.

The bottom line is that, depending upon where you obtained the replacement, you may have worsened the problem. The system is awesome when it works, but the system is very complex and not for the faint of heart when it comes to long term maintenance and ownership.



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