I just bought a 1981 300SD which is being shipped to me. The PO describes a transmission problem as follows;

1st to 2nd gear flare - if you let off the accelerator petal, it switches to second immediately. 2nd to 3rd to 4th - no problem.

I searched the forum and found info on K1 spring, B2 Piston and vacuum adjustments. The info I found relates to 2-3 and 3-4 flare regarding the K1 and B2 problems.

Do you think the 1 to 2 flare is also K1 or B2 related? Your advice would be greatly appreciated, since I hope to do the repairs myself.

Thanks

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1961 220SB Hydrak
1966 230S - Too Good for Parts
1981 300SD - now in Oakville