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#1
08-23-2010, 07:45 PM
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Positraction
My inquiring mind got the best of me the other day while changing a flat. It appears that my 85 SD has a locking diff in it, as one rear wheel did not turn while on the jack. Is this true? If so, that's awesome!!! Did all come that way?
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Thanks, Mark in NC "Spark plugs?...We don't need no stinking spark plugs!" 1985 300SD "Der Silberne Schlitten" 420,000 mi Wish these were diesel: 2003 Ford Club Wagon 130,000 mi 
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#2
08-23-2010, 07:47 PM
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If it was in park and the other wheel was on the ground, you won't be able to turn the wheel in the air.
From what I understand, an LSD was not a common thing for these cars to have.
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#3
08-23-2010, 07:50 PM
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^X2, take it out of park and it should spin. If it doesn't, take the parking brake off. If it still doesn't, an LSD should still allow some slip before locking.
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[/SIGPIC]~cirrusman 1983 Mercedes Benz 300SD - Wife calls him "Chitty Chitty Bang Bang" [SIGPIC] 1983 Toyota Tercel (Tommy, The little Toyota that could) 1965 Ford F100 (Grandma Ford) 2005 Toyota Sienna (Elsa, Wife's ride) Gone: 1988 Toyota Pickup 2004 Subaru Outback 1987 Cadillac Fleetwood Brougham 1986 Volvo 740 GL Station Wagon - Piece of junk. 1981 Volvo 242 DL 2 Door - Hated to see it go. R.I.P.  1987 Pontiac Fiero GT
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#4
08-23-2010, 08:47 PM
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The benz lsd it a friction device. It does not lock solid.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#5
08-24-2010, 05:33 AM
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ok, makes sense.
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Thanks, Mark in NC "Spark plugs?...We don't need no stinking spark plugs!" 1985 300SD "Der Silberne Schlitten" 420,000 mi Wish these were diesel: 2003 Ford Club Wagon 130,000 mi
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#6
08-28-2010, 07:55 AM
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I started thinking about the stupidity of this thread I started, on my way to work one day. Of course the wheel would not spin with one still on the ground! How stupid of me to even think that. I guess I am used to having vehicles on a lift, not one on the ground. Go figure, I'm an ASE Master Tech, too! This is sort of an embarrassing gaffe on my part. Please forgive me.
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Thanks, Mark in NC "Spark plugs?...We don't need no stinking spark plugs!" 1985 300SD "Der Silberne Schlitten" 420,000 mi Wish these were diesel: 2003 Ford Club Wagon 130,000 mi
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#7
08-28-2010, 08:40 AM
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You are forgiven!
Just don't start any oil threads, or WVO threads!
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#8
08-28-2010, 10:03 AM
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Ha, I have read some of the mess they have started! Thanks!
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Thanks, Mark in NC "Spark plugs?...We don't need no stinking spark plugs!" 1985 300SD "Der Silberne Schlitten" 420,000 mi Wish these were diesel: 2003 Ford Club Wagon 130,000 mi
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#9
08-28-2010, 03:59 PM
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Improper use of factory names.
Shocked to see "Posi Traction" listed in a Mercedes Forum, I decided to read and comment.
This name is the branded LSD of general motors and inaccurately used to describe far too many differentials. ( no disrespect to the OP ). below info found here: http://en.wikipedia.org/wiki/Limited_slip_differential Enjoy. Can anyone comment on codes/markings on the mercedes diff tags that indicate an LSD? Quote:
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83 300TD (need rear wiper assembly dead or alive) 84 300SD Daily driver 85 300TD almost 400k miles and driven daily. 98 E300D *sold 86 300SDL *sold and made flawless 10 hour journey to new home. 
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#11
08-28-2010, 05:05 PM
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As a history aficionado I too appreciate the list of names for LSDs for each manufacturer over the years. panZZer, I am thinking your post is a showing of a sense of humor. If not, please excuse the sarcasm. If so, bwah hahaha I am with you. And while I do not want to turn this into a HHO thread, I tried the Smacks booster on a Ranger that was waaayy too much maintenance for its worth.
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Thanks, Mark in NC "Spark plugs?...We don't need no stinking spark plugs!" 1985 300SD "Der Silberne Schlitten" 420,000 mi Wish these were diesel: 2003 Ford Club Wagon 130,000 mi
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#13
08-28-2010, 05:13 PM
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Right. Now you're losing even more efficiency than previously running off the existing system.
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Thanks, Mark in NC "Spark plugs?...We don't need no stinking spark plugs!" 1985 300SD "Der Silberne Schlitten" 420,000 mi Wish these were diesel: 2003 Ford Club Wagon 130,000 mi
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#14
08-29-2010, 05:39 AM
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Quote:
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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