I decided to convert my 83 turbo diesel to manual transmission. In my search for a 240D 4 speed manual tanny I ended up with two. One from an 83 240D and another from what I think is a 78 or 79. The 83 is a one piece unit and bolts up to the engine with no problems. The older unit is a two piece box and has a different bolt pattern. Can anyone tell me what the older unit is and why it has a different pattern? It was my understanding any year of 240D would be compatible.

As far as I know, both trannys will work, but you will need the proper adapter plate that is sandwiched between the tranny and the engine. The two piece was used on the W115 and on W123 240D until late 1980 ( I think)

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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)

[QUOTE=rs899]As far as I know, both trannys will work,

Right, both trannies will work and the bolt patterns should be the same. An "alignment" pin may need to be pulled, no problem, the bolts will align it fine. The only problem I found switching between these years is the reverse shifting rod, which may need shortening or lengthening, no problem either.

Make sure you get the right throw out bearing or you pull the tranny again, dont ask how I know.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"