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  #1  
Old 09-21-2008, 12:56 PM
Ran when parked.
 
Join Date: Nov 2007
Location: Aix, France and Salt Lake City, Utah.
Posts: 294
300D transmission into a 280CE.

I apologize for cross-posting this from the gas forum, just seems like there are more w123 guys here.

I've got an opportunity to buy a 280CE with a bad transmission- would a transmission from another w123 bolt up to the 280 engine?
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1981 230E, 1984 300D.
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  #2  
Old 09-21-2008, 06:12 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 30,778
This is a swap that i have done. It bolts up and works just fine except the shift points will be set for diesel redlines instead of the much higer revving gas motor.

The shifting is a bit odd but after you get used to it its not that much bother.

There may be a way to swap in the parts that regulate the shifting from the gasser so that all is perfection.

Tom W
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Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a Lotus 7 replica autocrosser with a modified K20 Acura engine.
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  #3  
Old 09-21-2008, 06:30 PM
79Mercy's Avatar
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Location: Florida
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How does it shift? To high or to Low? What RPM was it shifting at?
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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

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  #4  
Old 09-21-2008, 07:09 PM
ForcedInduction
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It shouldn't be a concern. A simple bowden cable adjustment will change the shift RPM to what it needs to be.
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  #5  
Old 09-21-2008, 08:57 PM
Ran when parked.
 
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Location: Aix, France and Salt Lake City, Utah.
Posts: 294
Tom, I assume this was a 300D transmission? I'm getting really tempted now..
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1981 230E, 1984 300D.
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  #6  
Old 09-21-2008, 09:37 PM
t walgamuth's Avatar
dieselarchitect
 
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Location: Lafayette Indiana
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I am not sure whether it was from a 240 or 300d.

It shifts at too low an rpm to be ideal for the 280e motor.

Tom W
__________________
Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a Lotus 7 replica autocrosser with a modified K20 Acura engine.
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  #7  
Old 09-21-2008, 09:39 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 30,778
Quote:
Originally Posted by ForcedInduction View Post
It shouldn't be a concern. A simple bowden cable adjustment will change the shift RPM to what it needs to be.
I thought there was a sort of governor type device which determined shift points in an automatic tranny.

Tom W
__________________
Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a Lotus 7 replica autocrosser with a modified K20 Acura engine.
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  #8  
Old 09-21-2008, 09:49 PM
79Mercy's Avatar
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Join Date: Mar 2008
Location: Florida
Posts: 4,128
You have to get these 280's reved over 3000 to get them to move. I usually let it shift inbetween 3-4K.
__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

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  #9  
Old 09-21-2008, 09:53 PM
ForcedInduction
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Quote:
Originally Posted by t walgamuth View Post
I thought there was a sort of governor type device which determined shift points in an automatic tranny.
Nope.

The bowden cable (on top of the valve cover on diesels) controls shift RPM and vacuum controls how firm the gear change feels.
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  #10  
Old 09-21-2008, 09:55 PM
79Mercy's Avatar
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Join Date: Mar 2008
Location: Florida
Posts: 4,128
forced is correct.
__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

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  #11  
Old 09-22-2008, 11:31 AM
Ran when parked.
 
Join Date: Nov 2007
Location: Aix, France and Salt Lake City, Utah.
Posts: 294
Now I'm tempted.. I know there are two 300Ds in junkyards, I could take a gamble on either transmission.
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1981 230E, 1984 300D.
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www.ranwhenparked.net
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  #12  
Old 09-22-2008, 04:15 PM
79Mercy's Avatar
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Join Date: Mar 2008
Location: Florida
Posts: 4,128
pick the tranny that has less grease on it. Let me know how it goes, if my tranny ever goes out i'll know what to replace it with.
__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

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