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#1
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Is this clunk in my differential
I am driving an 84 300D and am trying to diagnose a sound I hear and feel in my drive train. I feel a bit of a rumble from the rear when I am slowing down and almost stopped. It kind of feels like gears changing with too much play. I got under the car and looked at the flex disks and they look almost new. I concluded that the PO changed them relatively recently. Also, when I am cruising along at a relatively low speed, say 25 mph, if I hit on and off the gas pedal, I can feel a most definite play in the drivetrain. Could this be gears in the differential that are worn out. My next inclination is to empty the diff and take off the cover to have a look. What should I be looking for?
Thanks for any input.
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85 300D 75K Anthracite Grey 0-60 in 13 seconds **For Sale** 84 300D 333K Black (The Velveteen Rabbit) 0-60 in 14 seconds 00 Toyota Sienna 208K (Sold) 15 Subaru Outback 43K 11 Subaru Outback 67K 98 Ford Taurus 100K (Gertie - Was Grandma's - drove it to church and shopping - really) Daughter's car now. 30 Model A Ford 2 Door Sedan (Sold) 0-60 in . . . Never reached 60 |
#2
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Don't bother to remove the cover. Put it in neutral in a safe way so the you can get under it without danger and see how much play there is in the pinion gear....if its more than about 1/12 of a rotation you have a lot of wear.
The diffs almost never cause trouble. I would look at the half shafts for wear. The cv joints last a long time but they eventually wear out and need to be renewed.....could be anywhere from 100 thousand to three hundred thousand miles depending on usage. Good luck Tom W
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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. |
#3
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the deep clunking sound when you slow down is probably because your transmission vacuum isn't adjusted right or you have a vacuum leak. If its the same clunk I know, thats what it is
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1981 300SD 512k OM603 |
#4
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Oddly, mine has done this for the past 62k (entire time I've had the car), even after a removal/reinstall of the tranny for new seals by the dealer. It shifts wonderfully when accelerating though, it just clunks at 17mph when slowing down. "oh well" Neither of our other two do it....but my dad's 300SD has lots of slop/wear on the diff, it will probably need replacement at some point.
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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) |
#5
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Did you inspect the U-joint? Even though everyone says they almost never go bad, mine did. If that's your problem, you will have to replace the driveshaft.
http://www.peachparts.com/shopforum/showthread.php?t=208875&highlight=u-joint John
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Certified Registered Nurse Anesthetist (CRNA) 2002 F250 powerstroke with Plantdrive WVO conversion 1983 300SD 190K miles ,sold 2006 E320 CDI |
#6
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Yes when I had my shaft out it did have some play/notches in the U-joint....it is probably the issue....but I have no vibration when driving, and don't want to pay for a new shaft either....
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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) |
#7
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I was getting some clunking in my car especially when changing directions-fwd-rvrse. I crawled under it, looking at everything. what I deduced was the halfshafts. the boots were still good, so I went and got my trusty turkey frying marinade injector horse needle.
about 2-3 good doses per boot, and a few days later, and ever since, it's been quiet. yes, I am cheeeep.....
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1984 123.193 372,xxx miles, room for Seven. 1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven. |
#8
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Quote:
John
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Certified Registered Nurse Anesthetist (CRNA) 2002 F250 powerstroke with Plantdrive WVO conversion 1983 300SD 190K miles ,sold 2006 E320 CDI |
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