85 300sd What causes/corrects a flare in 1-2 with other shifts being firm?

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85 300 SD ~ 115K
82 500 SEC Euro ??K
78 450SL 164K

Low fluid level would be one cause

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

High vacuum could be another. Search on Superior shift kit.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

OK thanks

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85 300 SD ~ 115K
82 500 SEC Euro ??K
78 450SL 164K

The Superior Shift Kit has a spring to address that issue. You have to remove and open the valve body to install it.