My 82 240d with manual tranny makes a rattling noise as I start out in 1st gear. In neutral, at a specific low RPM the noise can be heard. The noise is also present at the same RPM with the clutch pedal pushed in, in all gears EXCEPT 4th. Last week on a trip to Williamsburg at speeds above 62 MPH the seemingly same rattle was constant and very loud.

Under neath the car I noticed that the linkages from the shifter to the tranny can be rocked (twisted) about 5 to 10 degees and makes a similiar noise. Could this 'slop' mean there is / are some missing bushings? Everry thing else is rock solid.

thank you, thebern

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1982 240D 313,000 (4 speed)
1984 300CD 172,483
1985 German Shepherd Dog -Lacey- R.I.P.11/04/05

Hood Stars, Wrist Crowns and Obsession Dobs

OK, structural things first,, just in case... Have you checked the trans fluid level ?

After thinking about this more.... I do not think this noise is in/from your trans... something is vibrating at that rpm...but the conditions in your tests would not point to the trans.... (I am guessing)...

Can you "feel" the noise in your pedal or in the gearshift knob ?

Your rattle may be similar to my buzz on my 83 manual tranny 240D. I have been trying to solve it ever sense I purchased the car 8 months and 9K miles ago. My buzz is always present, loudest at 17, 27, 47, and above 65 mph. The noise will instantly stop for a few seconds above 65 and then start again instantly with a vengence. I have replaced the tranny fluid, the flex disks, the driveline, motor and transmission mounts, all in vain. It is driving me batty!

The last items possible are tranny bad (shifts fine up & down) or a bad release bearing, pilot bearing, clutch. I really don't think it is the tranny, so I may need to have the clutch components replaced.

I replaced the fluid a few weeks ago so that checks out ok. The condition has existed since I bought the car. I wonder if it is the pushrods (at the shifter) that go to the tranny levers. Also the noise doesnot happen when starting out in 2nd or reverse.

I cannot feel it through the pedal buy can through the shifter. If I move shifter slightly the noise goes away. It really concerned me at the 62MPH plus speeds!


thebern

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1982 240D 313,000 (4 speed)
1984 300CD 172,483
1985 German Shepherd Dog -Lacey- R.I.P.11/04/05

Hood Stars, Wrist Crowns and Obsession Dobs

Kinda simple response from not-very-expert owner but the auto transmissions will "buzz" at different speeds/rpms if shifter bushings are worn. I don't know how manuals are put together but expect there are bushings in there. I'd replace every one of those first thing.

Nic
'85 300CD

I had an "engine" buzz that occurred at specific engine rpm. It turned out to be a rusted c-clamp at the back muffler.

"stops when I touch the shifter" ... Replace the shifter bushings...I will bet that fixes this for you .....

I will be picking up my "new" manual '82 240D over the next week or so. What kinda oil are ya'll running in the tranny?

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Jim

Owner's manual calls for 10W20 and I have always used 10W30 as 20 not available. Looking at Technical Specif9ications listings in my Body and Chassis manual that I just bought (printed 1987) and it calls for ATF in 123.123 body with manual tranny (listed of course only with the OM616 engine, so I don't think it a misprint).

I know this has been debated in the past, but I am interested in a authoritive response as to whether the owners manual has been superceded on this issue.

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2008 GL320CDI 6K
1970 280SL 112K
1982 240D 210K (Sold)
1973 220D 220K (Sold)
1967 200D 160K (Sold)
1992 400E 139K (Sold)
1988 300E 148K (Sold)
1987 300D 257K (Sold)
1991 300E 108K (Sold)
1987 300E 131K (Sold)
1978 300D TMU (Sold)
1980 300D TMU (Sold)
MBCA Member

I use Synthetic ATF, Red Line in one and Amsoil ATF in the other two 240d manuals.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Just as a point of reference, my previous diesel daily driver was a '68 220D/8. When it was idled some years ago, the drive train from the transmission back had 325K on it. Nothing but ATF had ever been in the tranny as long as I had the car (65K on). Since the book called for ATF, it probably had that fluid installed from the factory. Really liked that car, but if you think the 240D's are slow, take away 200 more cc's of displacement!!

I am using 10w/30 in the tranny and ATF in the differential.



thanks for the input guys!

thebern

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1982 240D 313,000 (4 speed)
1984 300CD 172,483
1985 German Shepherd Dog -Lacey- R.I.P.11/04/05

Hood Stars, Wrist Crowns and Obsession Dobs

I switched to RedLine MTL in all my manual transmission cars more than a decade ago. Stuff works great. Change it every 45,000 - 60,000 miles.

As for those phantom noises I think a good look at the exhaust system will be useful. The noise that goes away when you touch the gear lever is obviously associated with the gear lever mechanism. However the other reports of unpleasant noises can easily be exhaust system issues. The exhaust system is a pretty complex combination of potential noise sources, and it tends to be a little loose, allowing it to contact other stuff. On my 190E 2.3-16 this seems to always be the source of buzzing and resonant type noises.

Good luck, Jim

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Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)