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  #1  
Old 04-25-2005, 02:18 PM
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Rear end goes down & up

My mechanic said that my Differential mount need to be replaced in my '81 240D. I asked when this was replaced, would the rear end of the car stop going down when placed into drive and raising back up when shifted to park. I was told no, but that that movement was normal.

Is it time for a new mechanic?

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1981 240D, Auto Trans, 160k miles -- CRASHED!
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  #2  
Old 04-25-2005, 02:39 PM
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That is relatively normal (to a certain extent) the cars lower down when in drive because the driveline has torque on it that isn't there when its in park, thus it causes the car to sink down a little bit. They all do this, obviously with real worn out rear shocks/suspension/diff mount/ other parts it will do it more. I like it when mine does it, the feeling of it lowering 1" or so and hearing the transmission "engage" is so satisfying* vs a modern car, where you only know your in gear because a digital screen on the dash says so


*Disclaimer: This person is completely obsessed with his car
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'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
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  #3  
Old 04-25-2005, 05:32 PM
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More like time to adjust your idle speed.
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Old 04-25-2005, 05:51 PM
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Mine idles around 750 when in park, and drops to about 650-700 when in drive, as does our 83, and they both lower down around 1-1.5 inches when put in drive, what does it have to do with the idle speed?
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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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  #5  
Old 04-25-2005, 06:28 PM
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If the car goes into gear with a "Klunk" hard enough to load the suspension it usually means the idle speed is too high.
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  #6  
Old 04-25-2005, 11:39 PM
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Oh it doesn't clunk at all on either of ours, only slightly on the 83 due to a (very) worn differential that has *some* play in it. Mine makes no sounds at all when going into drive except the awesome sound of the tranny (not a clunk, more like a cool heavy hydrolics sound ) and the slight lowering effect.
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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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  #7  
Old 04-26-2005, 01:29 AM
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Quote:
Originally Posted by Big J
My mechanic said that my Differential mount need to be replaced in my '81 240D. I asked when this was replaced, would the rear end of the car stop going down when placed into drive and raising back up when shifted to park. I was told no, but that that movement was normal.

Is it time for a new mechanic?
Replacement of the differential mount will greatly affect this. If you change the rear subframe mounts at the same time, the problem of "raising and squatting" should practically disappear.
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Old 04-26-2005, 08:34 AM
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Hey, thanks for the replies!
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  #9  
Old 04-27-2005, 08:39 PM
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high ride

i would have said they all raise up and sink down more than most cars and dont worry about it. i have owned about 30 of them. of course this doesnt happen with sticks.

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..I also have a 427 Cobra replica with an aluminum chassis.
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