when i had my w115 i had swapped the automatic to a 4 speed from a 240d i put new clutch,240d flywheel, new pressure plate,new release and pilot bearings bolted up beautifully, but i did have to extend the ron on the slave cylinder about a half inch or it wouldnt actuate clutch at all..i was very happy with the results car 10x better, with much better acceleration actually was able to hit 100mph..and it didnt cause any driving vibration, sold the car but was to a friend of mine he's still driving it everywhere

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1962 220S
1966 200 Diesel
1981 300TD Wagon
1984 500SL
1989 560SEC Euro

You got a w115 240D up to 100mph? Without a diff swap it would technically be impossible....er improbable.

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1974 240D 3.0L 4(M) - 250K -OM617.910 + 300D FW + Rajay turbo power!
1977 6.9 3(A) - 84k

75 300D With a 4 speed from a 240d and stock diff.

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1962 220S
1966 200 Diesel
1981 300TD Wagon
1984 500SL
1989 560SEC Euro

Nice. I just got a 75 300d with an auto and the 617.910 engine. Haven't taken it off trailer yet. I guess these engines have the starter on the correct side for a manual Tranny to bolt to it?. I have a 5 speed from a 1984 190 d. That's what I would like to try. Did you have to change the driveshaft?

Can you just use the auto flywheel if you drive easy or why do you need the manual flywheel?

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

I was under the impression that more recent transmissions (like your 5 speed) will not bolt up easily to a om617 engine. Hopefully I am wrong.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

Thanks. I could live with a four speed. I'm a bit away from doing anything. Am I right in that they changed the 617 engines later on so that a manual wouldn't bolt up to them? I remember when I I was investigating putting a manual in a 123 turbo diesel it couldn't be fine without modifying the bell housing with one with the starter on correct side- way more than I am capable of.

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius