Vacuum issue or not, it should snap into gear fairly fast. My Nissan started acting like that a few years ago. The shop did a fluid/filter change and cleaned to electrical contacts. It worked great for about a month, then something happened running down the highway, the truck seemed to lurch, then it was like the brakes were applied, and the tranny sounded like a power steering pump going out. I managed to limp it home, 1st gears was noisy, shift to 2nd was good, 3rd and 4 were good. But at a stop, you could feel the tranny pull, then release. During the release, it would make a grinding noise.

It was wrecking yard tranny time, cause I could not afford a rebuild in California.

__________________
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