1987 T-Bird Transmision

Hello to all.

Question. Does the 1987 T-Bird with a 5.0 L use a vacuum modulator to control the shifts. I have the timing thing worked out, but the tranny does not seem to upshift properly. I have not begun the troubleshooting yet, but would love a heads up. I am a Chevy man (do'nt boo) :naughty: . Although I have worked on quite a bit of Ford motors, not trannys.

B4 I start, is the some tips on what to look for available from you gurus?

Thank you in advance

Chuck aka ulremember