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Started by JasonP, 08 January 2012, 04:28 PM
Quote from: JasonP on 08 January 2012, 04:28 PMI am getting two different stories on what this part is and what it does. I have a 1979 300SD, and this part is basically a linkage rod that goes from the top of the engine block down past the firewall to connect to the transmission. It is loose, as you can see from this video and pic. The top bushing is loose, and I can pull the rod right off no problem, and the bottom has no bushing at all - it is just held in place by a rusty metal clamp. It has A LOT of play, too much in my opinion. Top linkage:http://meandmymercedes.ucoz.org/video-2012-01-08-16-28-11.swfBottom linkage:Question #1: What is it? One person tells me it is the kick-down rod for the transmission (so when I floor it, it goes down one gear for higher revs and torque), and another person tells me that this is the rod that dictates shifting times for the transmission, based on how far the throttle is open. My car does have odd shifting times, as it hits 4th gear by the time I am going 35 miles per hour, so I am leaning towards the latter explanation. Question #2: Should it really be this loose? I cannot imagine these cars leaving the factory floor with this much play in the rod. And besides, it rubs up against the throttle linkage, so they bang into each other as well.
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