Before I swapped engines in my 240D a couple of months ago, 2nd gear was grinding quite a bit, and sometimes even 3rd. A few things I did to alleviate the problem :

1. Adjusted the new anti vibration t-mount tight against the bottom of the engine.

2. Put some fresh Redline MTL in the transmission.

3. Changed the rubber bushings on the transmission levers.

Not only have I been able to shift without any grinding, it actually feels like it wants to go into second. Hope this works for some of you.

Otto
'79 240D 4spd