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#1
03-01-2010, 12:21 AM
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Finally drove the SD, now yet another issue.
I finally was able to drive the SD this weekend (total of 60 miles). Engine pulls strong (better after as much as it cost to rebuild it), tranny is good, steering and suspension are great. The only issue now is a thunk upon deceleration and acceleration while in motion. I raised the rear of the car, checked the differential rear bushing, double checked the tranny mount, engine mounts, flex discs and everything is fine. I then put the shifter into neutral, grabbed the drive line and spun it from side to side. I can turn it appx 1 inch or so before it engages the wheels. Pulled the filler plug, there is oil but it resembles metallic black paint (metal in the oil). So now I guess it's time to go diff shopping. It's a good excuse to put a 2.47:1 in and take advantage of the first gear start I guess. So on goes the saga..........I suspect that with the car being from Idaho to begin with that the previous previous owner (maybe further back?) got the vehicle stuck in the snow and sat there spinning the wheel (not too good on the diff). It's really just speculation since there's no for sure way to know what has happened to this car in the past. Either way, definitely some sort of abuse to cause the diff to start to fail at just over 171K. Has anyone else had problems with their diff early on?
__________________
1982 300SD 180K, rebuilt engine 1973 450SLC Megasquirt 1990 Volvo 780 - 273k 1993 Volvo 240 Wagon - Scrap yard slumber http://www.fuelly.com/sig-us/44619.png 
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#2
03-01-2010, 01:41 AM
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The clunk when slowing down to a stop is often related to vacuum controls to the transmission. My 300SD's former transmission did that for a long time until I replaced and re-calibrated the vacuum modulator. 1" of play in the differential is pretty normal.
__________________
-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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#3
03-01-2010, 11:34 AM
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before condemning the diff, I'd pull the cover off, and clean the bejesus out of it with kero and brake spray, then thoroughly inspecting the spiders, and ring gear/bearings. see if you see any smooth surfaces, or sharp edges (should be chamfered) on the gears. obviously, if you see broken teeth, it's a bad sign.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#4
03-01-2010, 11:37 AM
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Can you tell where the sound is coming from? As in the front or back. If it's more forward than rearward, inspect the guide rod bushings.
Good luck.
__________________
83 SD 84 CD
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#5
08-05-2010, 07:56 PM
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Old post, but I finally got around to photographing the insides of my old diff. New diff from a euro spec 500se has been in for four months now, no more clunk or rolling in park
 . Here's the pictures:   
__________________
1982 300SD 180K, rebuilt engine 1973 450SLC Megasquirt 1990 Volvo 780 - 273k 1993 Volvo 240 Wagon - Scrap yard slumber http://www.fuelly.com/sig-us/44619.png
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