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Tonner · 06-12-2018, 01:12 PM

I have a '72 C20 with a TH350 transmission. I bought it in pieces, so I never saw the transmission cooler lines connected. Both ends of both lines have flared ends and fittings. One of the flare fittings on the transmission end is screwed into a separate brass adapter with the same size threads and a flat end. Of the four ends, it's the only one and there are none in the bolt bags I received with the truck. Is the adapter supposed to be there? Should both lines have one? Should both lines have two? What is the adapter called and where do I get more? I tried threading them all in as-is, but the non-adapter line leaks from the transmission end. All appeared to tighten just fine.

06-12-2018, 01:12 PM	#1
Tonner Registered User Join Date: Apr 2015 Location: Spokane, Washington Posts: 39	Transmission line fittings I have a '72 C20 with a TH350 transmission. I bought it in pieces, so I never saw the transmission cooler lines connected. Both ends of both lines have flared ends and fittings. One of the flare fittings on the transmission end is screwed into a separate brass adapter with the same size threads and a flat end. Of the four ends, it's the only one and there are none in the bolt bags I received with the truck. Is the adapter supposed to be there? Should both lines have one? Should both lines have two? What is the adapter called and where do I get more? I tried threading them all in as-is, but the non-adapter line leaks from the transmission end. All appeared to tighten just fine.