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Discussion Starter #1
I am a new owner of a 1982 300d (automatic tranny) with 129K miles on it and have been reading the posts here. It runs great and starts without plugging it in down to 0 Degrees F. It is a little slower than I thought it would be in the acceleration but I have read some very good posts about tweaking it out - mostly cleanse and adjust. I also have a 99 Jetta turbo diesel that has really good pickup and go that I am using for reference. I have the usual problems of sticky sun roof, engine dieseling after shut off (continuing to run), weird climate heat and cruise control. I will be playing around with the vacuum system and tweaking it to perfection in short order as per the forums suggestions. One thing that I am interested in finding out about is whether or not an automatic transmission from a gas Mercedes will mate up to the diesel engine. There is a wrecked 77 gas Mercedes in the local junkyard (front end hit) that has some good items in it and I was thinking of picking up the tranny in case mine goes out. Any of you serious gearheads have the answer for me? <br>
 

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Re: Are gas & diesel transmissions exchangable?

I replaced the autotranny in my '80 280 SE W126 with one from a '86 diesel Benz i think it was a 300 D 124
 

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Re: Are gas & diesel transmissions exchangable?

Your '82 300D Auto trans has non turbo gear ratios of I. 3.98:1<br>
II. 2.30:1<br>
III. 1.41:1<br>
IV. 1.00:1<br>
(the same tranny in all non turbo models dating back to'74 and a few models earlier)<br>
<br>
the gas models have typical ratios of<br>
I. 3.68:1<br>
II. 2.41:1<br>
III. 1.44:1<br>
IV. 1.00:1<br>
The diesel needs more incentive to move. Using the gas tranny would slow your car down. I would look for a turbo engine and tranny instead.<br>
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Re: Are gas & diesel transmissions exchangable?

did you ever do the tranny replacement with the 77 trans? I have a 77 300D that needs a tranny<br> and yes I am looking for one.<br> <br> Any suggestions?<br> <br> thanks in adv.<br> <br>
 
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