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#1
12-23-2005, 09:43 AM
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Rear diff fluid ???
Anyone know if it's necessary to change the rear differential fluid HOT or not warmed up? Is hot and often the rule here too?
aa
__________________
'87 924S '81 280SEL Sold -> 81 300SD - 93 300E w/ 3.2 85 300D- 79 300SD 82 300CD 83 300CD - CA 87 190E 5 spd 87 Porsche 924S "..I'll take a simple "C" to "G" and feel brand new about it..." 
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#2
12-23-2005, 09:48 AM
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I would think its preferible to do so shortly after a drive......so that anything that would settle out is still in suspension when you drain it....
It doesn't require frequent changes but doing it sooner isn't going to hurt it any and may help extend its life even longer. I am planning on doing mine tonight.....if my fill plug comes out..adn certainly if the drain plug coes out after that... Thats important...remove the fill plug FIRST......becasue if you can't get that out you will have lost nothing....if you drained it first then you are in a world of hurt. I'm using Mobil-1 syntetic gear lube.
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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#3
12-23-2005, 04:32 PM
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I switched to Moble One diff oil.....what the heel at $7! Now I'm living large with 100% synthetic everything, even the brake fluid!
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#4
12-23-2005, 06:37 PM
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I have Mobil 1 Syn in my rear diff too...as well as mobil 1 synth ATF, engine oil is still dino
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k
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#5
12-23-2005, 08:06 PM
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Quote:
 After two hours, half a can of bolt break-free, and most of the skin on my hands, it still hadn't budged. Lucky for me that I had an explorer on hand with some army surplus tow cables.....  that sucker came RIGHT out!although I wouldn't recommend that  , avoid it if possible
__________________
"I would rather be ashes than dust! I would rather that my spark should burn out in a brillaint blaze than it should be stifled by dryrot. I would rather be a superb meteor, every atom of me in magnificent glow, than a sleepy and permanent planet. The proper function of man is to live, not to exist. I shall not waste my days in trying to prolong them. I shall use my time." -Jack London 1876-1916 1983 300CDT (running WVO since 12/05) 1981 300SD (parts car)
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#6
12-23-2005, 09:18 PM
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Well I got done with my K-1 kit install and new filter and fluid in the transmission, and my Differential oil change...
I got lucky..both my plugs came out fairly easy without any excessive effort on the differential.
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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#7
12-23-2005, 10:15 PM
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Remember if you stick Mobil 1 in the diff you should change it again in a year. When I first did mine the fluid was probably original and came out looking real clean. Just for the heck of it I did it again a couple of months ago while the car was blocked up with the trans out. The one year old Mobil came out black as engine oil!
 People are not kidding when they say that stuff cleans!
__________________
1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200
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#8
12-23-2005, 10:26 PM
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Quote:
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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#9
12-23-2005, 11:18 PM
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WWIII blues.....continued
Quote:
if I can be in yours'... I said that." "........Lit a cigarette on a parkin meter and walked on down the road."
__________________
'87 924S '81 280SEL Sold -> 81 300SD - 93 300E w/ 3.2 85 300D- 79 300SD 82 300CD 83 300CD - CA 87 190E 5 spd 87 Porsche 924S "..I'll take a simple "C" to "G" and feel brand new about it..."
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#10
12-23-2005, 11:23 PM
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Quote:
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#11
04-06-2006, 11:25 PM
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Needed tools?
What tools are needed/recommended for changing the diff fluid?
JWJ
__________________
JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines!
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#13
04-07-2006, 08:06 AM
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Its really easy to do if you work safe! Here is the procedure.
http://dieselgiant.com/mercedesreardifferentialfluid.htm Use synthetic fluid if possible and do try to change is after the car has been run a while. The warmer the fluid is the better.
__________________
1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair 
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#15
04-07-2006, 09:19 AM
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The last post is important. On a couple of plugs I wondered if the plug was going to release or a piece of the housing was going to come along with it as well. You want as much area on the tool to plug as you can get. Certainly not the dirt shoved ahead by the hex limiting the total available contact somewhat. Also always make sure the fit of the hex tool is pretty tight as rounding that nut out might not be funny. Although I have not heard of anyone accomplishing that yet. Place for a little anti seize as well perhaps?
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