I have a really hard first shift and have been looking at my vacuum system. I can't for the life of me figure out where the line that goes to the modulator is supposed to connect to. That white plastic thing, sometimes called the transducer, that sits on the IP? It seems all the lines leading out of that go to the firewall. I haven't been able to locate a line that seems to be going to the tranny modulator.

I have looked over the vac diagrams supplied by phantom s, but none of them seem to coincide exactly with what I'm seeing under the hood.

I've done a lot of searching and my head is spinning with vacuum info. right now.

It is just my first upshift that it really clunky, BTW. Sometimes the next shift is also rough. All other shifts, including downshifts, are smooth and barely noticeable. It never flares and the clunkiness of the first two upshifts differ based on throttle and outside temp. Less throttle=less clunky for the first shift, with the second seeming to like a little more throttle, but not too much. It's less clunky when warm.

I have a leak in my brake booster line too, I think. When I tested the check valve it fluctuated betwen 20 and 22 and wouldn't stay steady. Areas down the line from there have low vacuum but give a steady reading.

If this was my only problem, though, wouldn't all my shifts have some trouble?

__________________
Ralph

1985 300D Turbo, CA model
248,650 miles and counting...