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'94 Dodge Cummins 3500 Dually

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I have a small transmission fluid leak underneath the radiator of the left side only after being driven.

I'm assuming it is at the trans cooler line coupling but haven't looked yet.

Are these couplings bad to leak and if so, do I just replace an O ring or is it not that easy?
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· Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
17,255 Posts
Are these the rubber hose and 'quick-connect' style coupling? Can that line section be replaced separately?
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