Locks and seals threaded fittings. This fluid provides two key functions in your transmission; ... A roll of Teflon tape should cost around $3. Temperature: -20° To 350° Butyl Water, Alcohol, Skydrol, Petroleum Oils Low gas Permeability. This assembly is removed then you tap the holes left in the transmission housing to a straight 3/4 16pt thread so that you can reuse the push lock fittings from the heat exchanger to then run factory Grand Cherokee cooler lines and valve etc. Step 7 - Replace the fill plug One the transmission is full, turn off your air source and remove your tube from the transmission. If it leaks then I will try the teflon tape. Parts may be repositioned up to 4 hours after application. Is that the right way? In general - be careful with silicone tubes and gaskets with oil products. The fuel would eventually eat up teflon tape but this stuff is like brand new a year later. Fluid, Power Steering Engine Coolant meets many automotive Duro: 70 Standard Fluid Acetone specifications. Temperature range -65°F to 400°F (-54°C to 204°C). 66 Malibu Coupe, home rebuilt 350. Resists leakage, vibration loosening, moisture, hydraulic fluids and diesel fuels. I would use teflon paste, and leave two threads at the end with no sealant on them. Lubricates threads for easy assembly and disassembly. TR-60D (100-99) Rev.∅ 08/16/04 Page 2 of 19 TABLE OF CONTENTS 1.0 Discussion 2.0 Guide to Compatibility Key 3.0 Chemical Compatibility Guide for Commonly Used Elastomers for O-Rings Polyacrylate Automatic Transmission Water, Toluene, Automatic transmission seals. If the transmission fluid can't flow through the system, then you'll be unable to switch gears, the transmission will seize up and likely make some very noticeable grinding and crunching sounds, and your car will be undrivable. What sealant is brake fluid resistant for use on the npt threads? O-ring compatibility plays a critical role in o-ring performance – find the right material for your application and avoid o-ring failures. My brother's van has a problem with transmission fluid leaking out of the dipstick tube hole. Contains PTFE. I will change the transmission oil with the seals and plugs for now, but if it again leaks then I wont buy new oil again, I will just drain the ( few weeks old ) oil, use teflon tape and then pump that oil back to the transmission. Clean off the treads of the fill plug and wrap with a few turns of Teflon tape. O-ring compatibility chart offers guidance on chemical resistance and swell for Viton o-rings, FFKM o-rings, Silicone o-rings, Teflon o-rings and more. When the jug is empty, simply refill with fluid and continue until the transmission is full. Depending on the content of the products silicone may - or may not - be resistant. 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