I have '81 300D with 722.118 AT and would like to check the Working, Modulator, and Govenor pressure (as sugguested by the ATSG manual) before I start tearing into the transmission itself.

Where can I get pressure gauges to test transsmision?

If I have to make something rather than buy something, what are the thread sizes?

If I construct something, it will likely be have fittings in Inches --- where can I get Metric to Inches conversion fittings?

David