C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Sealant on auto tranny pan gasket - yes or no?

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Old 10-02-2001, 06:52 PM
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Colorado Chuck
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Default Sealant on auto tranny pan gasket - yes or no?

I know the factory and most shops don't use a sealant (rtv) on the pan gasket, but then there are often those "little" leaks. What is best, and if I use a sealant, what kind? This is on my '96.
Old 10-02-2001, 07:24 PM
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Romeo Barrera
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Default Re: Sealant on auto tranny pan gasket - yes or no? (Colorado Chuck)

I've used Hypohalomar (sp?)HPF, and it sealed up pretty good. It's a non-hardening sealant.


[Modified by Romeo Barrera, 8:17 PM 10/2/2001]
Old 10-02-2001, 08:13 PM
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weekendwrench
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Default Re: Sealant on auto tranny pan gasket - yes or no? (Colorado Chuck)

Generaly none is used, just the gasket. Make sure hepan is not bent or dimpled from overtightening.
Old 10-02-2001, 09:04 PM
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vettenuts
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Default Re: Sealant on auto tranny pan gasket - yes or no? (weekendwrench)

I bought the GM kit, and it came with two gaskets, one cork and the other rubber. There is a small note that tells you which to use, the rubber one. I didn't use any sealant and have had no problems. I made sure the pan was straight and everything was clean. I also tightened in small increments until reaching the correct torque value. If I were to use any sealant, I would use the Hylomar that was recommended above.
Old 10-02-2001, 09:19 PM
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KORE YOME
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Default Re: Sealant on auto tranny pan gasket - yes or no? (Colorado Chuck)

Dryer is better! .....and don't over torque cork!
Old 10-03-2001, 01:09 PM
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robert kirk
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Default Re: Sealant on auto tranny pan gasket - yes or no? (Colorado Chuck)

I have always spread a lite coat of white grease on the pan side to hold the gasket in place. i leave the trans side dry. never had a leak problem or trans problem. it has always been cork gaskets just because thats what came with the new filter. hope this helps robert
Old 10-03-2001, 02:02 PM
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MCPOWHITE96
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Default Re: Sealant on auto tranny pan gasket - yes or no? (robert kirk)

Hylomar is the BEST. I use it on every gasket.
Old 10-03-2001, 05:00 PM
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Colorado Chuck
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Default Re: Sealant on auto tranny pan gasket - yes or no? (MCPOWHITE96)

Thanks, guys. I will see about getting the Hylomar sealer. It just seems that without something extra, you get those tiny leaks.
Old 10-03-2001, 09:12 PM
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6 speed Sid
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Default Re: Sealant on auto tranny pan gasket - yes or no? (Colorado Chuck)

I use just a little of the Permatex, non-harding type and never had a problem. It will also hold the gasket in place (cork type). Sid..
Old 10-04-2001, 03:09 AM
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GlockLT4
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Default Re: Sealant on auto tranny pan gasket - yes or no? (6 speed Sid)

I didn't use any.. that gasket should be good enough!

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