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Old 04-23-2008, 02:53 AM
otto huber's Avatar
Registered User
Join Date: Aug 2003
Location: Alameda California
Posts: 954
A cure for the 2nd gear grind on your 240D 4spd

Before I swapped engines in my 240D a couple of months ago, 2nd gear was grinding quite a bit, and sometimes even 3rd. A few things I did to alleviate the problem :

1. Adjusted the new anti vibration t-mount tight against the bottom of the engine.

2. Put some fresh Redline MTL in the transmission.

3. Changed the rubber bushings on the transmission levers.

Not only have I been able to shift without any grinding, it actually feels like it wants to go into second. Hope this works for some of you.

'79 240D 4spd

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Old 04-23-2008, 02:56 AM
Posts: n/a
MTL made my 2 and 3 shifts grid more often.

Redline D6 ATF is actually the correct fluid to use.
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Old 04-23-2008, 03:15 AM
bgkast's Avatar
Rollin' on 16s
Join Date: Dec 2005
Location: Vancouver WA
Posts: 6,528
Mine never grinds (knock on zebrano)
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine
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Old 04-23-2008, 06:14 PM
KCM KCM is offline
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Join Date: Jan 2004
Posts: 625
Been having the 2 to 3 shift grinding once in a while. Didn't happen till I changed the oil with Dexron ATF fluid. Was kind of milky looking so thought it should be changed. Guess that was a mistake.

So we have one pro and one con for Redline MTL and a pro for Redline D6. Any other suggestions I could try? Where do you buy Redline oil?
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Old 04-23-2008, 06:22 PM
bustedbenz's Avatar
Registered User
Join Date: Feb 2007
Location: Lexington, NC or Boone, NC
Posts: 2,272
I thought some manual transmissions ran on heavyweight gear oil rather than thin ATF... I don't know for a fact if this is true with Mercedes transmissions or not.

"What could possibly go wrong?"

~Michael S.~ -
1986 M-B 300SDL, retired due to rust and electrical problems. Donated engine to:
1987 M-B 300SDL, odo dead. New project.
1982 M-B 240D, odo stopped at 308,000
1982 M-B 300SD, 175,000
1989 Dodge Ramcharger, 87,000 - 4wd, 318
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Old 04-23-2008, 06:33 PM
winmutt's Avatar
85 300D 4spd+tow+h4
Join Date: Apr 2006
Location: Atl Gawga
Posts: 9,331
Grinding == syncros going bye bye. Double clutch, deal with it or rebuild the tranny. You can optionally just put a new tranny in. I am collecting spares as the engines tend to outlast the tranny.

1987 300D Sturmmachine
1991 300D Nearly Perfect
1994 E320 Cabriolet
1995 E320 Touring
2001 Eurovan FOR SALE
1985 300D car, sold and missed.
OBK #42
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