need transmission advise FAST - PeachParts Mercedes-Benz Forum

carlover · #1 08-26-2006, 09:42 AM

There isn't anything like carpet between the accelorator and the switch, but it seems to me like that would cause it to engage sooner,but wouldn't cause it to fail to shift out of 1st in when in wide open throttle. Am I missing something here ? This is my first Merdcedes and I'm new to the forum, so I'm open to any suggestions.

david s poole · #2 08-26-2006, 12:22 PM

if you look behind the air cleaner you will see the accel linkage.look a little lower and you will see a cable coming from the trans[right or pass side] normally routed under the exhaust crossover pipe and attatched to an arm on the accel linkage[push on ball] if you find this and then follow it you will see a straight adjustable rod that connects via a push on ball at each end. this rod has a 8mm bolt head holding the adjustment.by making this rod longer you will stop the trans from holding the gears too long and of course the reverse is true.

dkveuro · #3 08-26-2006, 12:24 PM

The 'bucking' is the rev' limiter cutting in.

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carlover · #4 08-26-2006, 01:28 PM

David, are you talking about the flat adjustable piece that goes to the pivot device that the cable is attached to. Looks like it's about 8in. long, maybe 3/8in.wide, right on top-- silver in color, with one screw holding two sliding pieces of metal together ? If that's what you are talking about, mine can be shortened around 3/4in. Should it be adjusted as far as it will go the other (short) way? It is now adjusted as far as it will go in the other (long) direction. Won't that effect the normal shift pattern, or is that kick-down only ? I don't see any adjustment on the cable itself unless it's under that red accordion cover at the top, or am I just missing it ?
Tom

raymr · #5 08-26-2006, 03:05 PM

It will affect your shift pattern, but if you want to try changing it, mark the current position so you can set it back later. Also see what happens if you temporarily disconnect the kickdown switch.

carlover · #6 08-26-2006, 06:18 PM

Many thanks to all, especially David S Poole for his excellent description. I was wrong when I said that my adjustment was as far as it would go in the long direction. In fact it was just the opposite, and after a lot of trial and error, I have it close to where it should be. Although I found it to be a simple adjustment, I also found it to be quite sensitive. An eighth of an inch makes a difference. Thanks again to all for you efforts.
Tom

david s poole · #7 08-28-2006, 09:26 AM

well i'm glad that you found the adjustment rod.if it was as short as poss it certainly explains the strange shift behavior.do i gather it is now fixed? you know it didn't get to be that short by itself. good luck.