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Current Diesel Cars:1982 300SD, 1982 300TD, 1974 240D, Previous Diesel Cars: Too many to list
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Discussion Starter #1
I am putting together a manual turbo diesel wagon. I don't think it was offered in 1982 or ever in the US market. I got the motor out of a sedan that someone put together a 1984 300SD motor and a 300D 4spd manual trans. The flywheel was custom made and balanced. Custom drive lines were made as well. I converted the rear wagon self leveling suspension to heavy duty shocks and SD springs.

I just wanted some advice on what to ask for a selling price. Interior and body are decent. Heater and all windows work. Has the 3rd seat. Euro headlights. Dash is cracked but I have a clean and crack free replacement.

So what do you all think is a fair price?

Regular automatic" wagons in similar condition in my area seem to be going for around $2500-3500.
 

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I would think most people would want the auto. It is a wagon, not a sports car. If you are patient you might find a buyer who has to have a manual and is willing to pay more. If you are anxious to sell it may be hard to find a buyer who wants a manual and you might have to lower the price. Mercedes did not offer them for a reason.
 

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1967 250 SL, 1965 300SE lang
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I think having a manual transmisson in the wagon would be nice, but not at the cost of deleting the SLS.
 

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1989 Toyota Land Cruiser HJ60, 1985 300D, 1996 12V Cummins Dodge 2500
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I would be interested in something like that. What is the body like on the 300TD your swapping it into?
 

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Current Diesel Cars:1982 300SD, 1982 300TD, 1974 240D, Previous Diesel Cars: Too many to list
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Discussion Starter #6
4spd Manual 300TD Project update

I deleted the SLS. Now the car doesn't annoyingly sag. I put in heavy duty 300SD springs and heavy duty shocks. I guess if functioning properly the SLS would be fine but it seems like even if one component goes bad it is about the same as the cost of the deletion. Parts for deletion cost me $260 and about an 1.5 hours work.

The project should be done by tomorrow afternoon if all goes well. I'll try to post some pictures then.

Any guesses on the economy? That and the efficient transfer of power from motor to wheels is the point of the project.

I love the manual transmission. It keeps driver engaged in the driving experience. So more fun. Plus the extra economy. Win Win.

I am thinking 35mpg.
 

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1989 Toyota Land Cruiser HJ60, 1985 300D, 1996 12V Cummins Dodge 2500
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33 Posts
If you can find the drive ratios of the auto transmission that the 300TD originally came with. Get the gear ratios of the manual and compare. The last drive ratio (4th gear) will be a low number. Lower the drive ratio number compared inbetween the 2 trannies....the less RPM the motor is turning at. I would guess for every couple hundred RPM difference you would gain a MPG or lose. Did you drive the car before as an auto? If you knew the consumption before and with knowing the gear ratio of the 4spd man. I think your estimate will be close.
 

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Current Diesel Cars:1982 300SD, 1982 300TD, 1974 240D, Previous Diesel Cars: Too many to list
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Discussion Starter #8
300TD Turbo Diesel MPG

Looks like gear ratio in the rear end is 2.88 trans in fourth is 1 so: With 185/70/R14 tires brings it to:

2172 rpm in 4th @ 55 mph
2567 rpm in 4th @ 65 mph
2962 rpm in 4th @ 75mph

It seems like rpms will be about 400-500 lower @ 65mph.

So maybe +5mpg from stock?

I'll update with actual experimental values soon.
 

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1989 Toyota Land Cruiser HJ60, 1985 300D, 1996 12V Cummins Dodge 2500
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33 Posts
How are you making out on this thing? Any pictures of the TD you can post?
 

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W108 250s '67, w123 280ce '77, w123 300d-t '85, w126 300sd '85', w140 s600 '94,w210 e230 '97, bug69
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That's a great wagon conversion, I'm also planning to change the auto tranny of my 300d into a manual 4 speed that came from a euro 300d, but I'm thinking still because when i get old I wouldn't be so comfortable with a manual, I'm still weighing the advantages versus the disadvantages, but manual tranny will be putting more mugs in my cat
 
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