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  #1  
Old 10-14-2000, 02:03 AM
Ken
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When shifting from first to second, I have to double clutch or my transmission makes a very nasty noise. If I shift carefully, the transmission engages properly and exhibits normal behavior; if not, it grinds and will not engage.

Based on my experience with non-MB autos, I believe that the synchros are worn, and since I must drive to Atlanta next week, I planned to stop by ASAP and bring home a rebuilt transmission.

However, today a local mechanic friend suggested that a new set of shifter bushings could solve my problem. It is true that the bushings are quite worn, but I assumed there was no reason to replace them until I replaced the worn transmission. Was (am) I too hasty in my analysis? Could worn shifter bushings cause symptoms identical to worn synchros?

The transmission shifts flawlessly from second to third, and from third to fourth; and downshifts other than from third to second, and second to first, are smooth as glass. There IS a large amount of play in the linkage, so much so that engaging reverse is sometimes difficult (although it is the lockout mechanism, not the gearbox that seems at fault).

Obviously, I need to replace the bushings, but does it sound to any of you that there is areason to do so before replacing the current transmission?

Thanks so much,

Ken
Hammond, LA
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  #2  
Old 10-14-2000, 08:59 PM
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Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
I've had at least 7 MB's with std. trans & yes the brass syncro rings are a high fail part if you rush any up-shift. Have replaced syncros many times.
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  #3  
Old 10-15-2000, 07:23 PM
sirrom
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I have a '79 240D and have the exact same problem and have been told by a mechanic that it is a worn synchro. Until I can afford the repair I have been shifting "gently" or double clutching. See my entry titled "worn synchro" of a few days ago. Good luck!
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