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  #16  
Old 07-06-2005, 09:46 AM
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85's have the VSS on the back of the speedo, this may be the electronic gizmo you've heard about, I believe that the VSS is elsewhere on earlier models. Other than that the speedometer is the same as earlier models (except the 85mph versions of course).

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  #17  
Old 07-06-2005, 12:15 PM
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Quote:
Originally Posted by Wasuchi
85's have the VSS on the back of the speedo, this may be the electronic gizmo you've heard about, I believe that the VSS is elsewhere on earlier models. Other than that the speedometer is the same as earlier models (except the 85mph versions of course).
I just swapped an 1985 speedo into my Bride's 84 300D to display the correct speed after changing the diffy out. Externally, the speedos looked identical, the only difference was the gearing.
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  #18  
Old 07-06-2005, 03:31 PM
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I have heard that using a higher viscosity differential lube may reduce the noise/whining. I believe the factory spec is for 75-w90? Redline and Amsoil offer 75-w140 synthetic lubes that you may want to try. I wouldn't go with a non-synthetic 140w oil as it may not work well enough at low temps. The synthetc 140 should be fine unless you are in Alaska. RT
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  #19  
Old 07-06-2005, 03:41 PM
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While we're on the subject.......my "good" 240D is an auto and my parts car is a manual oh well. Question is, I read before that the manuals are geared differently than the autos, so could I take the diff gears out of the manual and put in the auto to get less noise at highway speeds or will it make my 240D too poky? Both cars are '81's
It does go pretty good from a stop - based on comments I see from other owners this is not normal.
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  #20  
Old 07-06-2005, 11:39 PM
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identifying ratio

I would have thought that MB would be consistant in the location of the ratio stamping on the diff housing. They were not; my 300SD is stamped at the rear left (3.07) - doner 420 (2.47) is at the rear right side.
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  #21  
Old 07-07-2005, 12:40 AM
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hockey puck

the ratios are the same but the difference is that the shift points indicators on the speedo are slightly different to allow for slippage in the auto box. so nothing there to offer any change in performance.
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  #22  
Old 07-07-2005, 12:42 AM
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btw...

what is a vss?
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  #23  
Old 07-07-2005, 08:30 AM
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Quote:
Originally Posted by hockeynut
While we're on the subject.......my "good" 240D is an auto and my parts car is a manual oh well. Question is, I read before that the manuals are geared differently than the autos, so could I take the diff gears out of the manual and put in the auto to get less noise at highway speeds or will it make my 240D too poky? Both cars are '81's
It does go pretty good from a stop - based on comments I see from other owners this is not normal.
Why pull gears...just flush fluids and put the Diff assembly in as a unit....

But I bet this is what you really meant to say.

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