I have my car with a shop where a distant family member works getting the A/C working. I thought all it needed was an avac. done and the conversion to 134. When I bought the car 2 1/2 years ago the PO said the system was worked on the previous summer and it was too cold to check when I took it home.

Anyway...my mechanic says I need a new compressor clutch and he can't find one. My question is this--do I have to go to a dealer? I checked FastLane. Also, is there something that he can do to test the clutch that he may not know? I know the clutch spins freely, but am not sure if it ever engaged.
Thanks, and BTW, I did search and did not find an answer to my questions.

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'85 300DT--215,000 miles
'82 300DT--255,000 miles