I'm getting ready to do an engine swap in my '82 300TD. I want to put an M104 3.2 engine in it, most likely from a w124 e320 or 300e 3.2. The engine could also come from an S320 I suppose.

I'm not familiar with tranny numbers, bolt patterns, etc for these cars. I have a few questions:

1. Will the original transmission in my w123 mate with an M104 engine?

2. Will the M104's transmission mate to my driveshaft? I could make an adapter easily but I'd rather save the time.

3. Are there any 5-speed automatic transmissions that I could use?

4. Are there any trannies with a locking clutch that I could use?

Thanks in advance!

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'82 300TD
'77 6.9
'75 280S
'74 280
'87 Porsche 944 turbo