Hard shift on a tranny usually means little or no vacuum. There are threads on how to test the vacuum modulator and the VCV (Vacuum control valve)

Use this to start...

http://www.peachparts.com/shopforum/showthread.php?t=158216&highlight=adjust+transmission

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D