986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Transmission Drain Plug Size (internet seems to be wrong)

truegearhead · 02-26-2021, 06:31 AM

I'm trying to replace my drain and fill plugs with AN fittings to for a trans cooler. I looked up the thread size and I can see multiple sites claiming its M18 1.5 but that is too small and the incorrect threads. The fitting on my transmission are tappered threads. Anyone know the correct size?

02-26-2021, 06:31 AM	#1
truegearhead Registered User Join Date: Jul 2011 Location: Richmond, VA (The Fan) Posts: 978	Transmission Drain Plug Size (internet seems to be wrong) I'm trying to replace my drain and fill plugs with AN fittings to for a trans cooler. I looked up the thread size and I can see multiple sites claiming its M18 1.5 but that is too small and the incorrect threads. The fitting on my transmission are tappered threads. Anyone know the correct size? __________________ 1997 Boxster 4.2L Audi V8 Bi-Turbo 2003 911 C2 NASA HPDE Instructor