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#1 |
Registered User
![]() Join Date: Nov 2000
Location: chimayo, nm, usa
Posts: 898
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TH400 Pan Gasket-Glue or no Glue?
This weekend I'm planning on sealing up some leaks on my TH400 it's having when parked. I purchased the entire gasket kit from this local transmission guy, and he told me not to use any glue, or sealer/permatex whatever you call it. He said it tends to deteriorate the gasket, and if you use silicone it tends to make it leak. What's you all's take? My main concern is sealing the leak. I'm going to take that tranny guy's advice with a grain of salt. He probably figures if it leaks, I'll get discouraged, and end up taking it to him. So are his comments true? He said not to use any on any part of the tranny. I had thought of using some on only the pan gasket. Thanks...
Last edited by 72step; 02-16-2007 at 12:30 AM. |
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#2 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: TH400 Pan Gasket-Glue or no Glue?
I use rubber gaskets on tranny pans and use nothing else on it, I've reused the same gasket several times and have had NO leaks with it. Not too mention I don't have to waste a lot of time cleaning silicone or cork off the the sealing surfaces everytime I pull the pan.
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" Last edited by krue; 02-16-2007 at 12:36 AM. |
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#3 | |
Senior Member
Join Date: Feb 2001
Location: Ridgecrest. CA, USA
Posts: 1,715
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Re: TH400 Pan Gasket-Glue or no Glue?
Quote:
![]() Respectfully Billy
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Billy ![]() ![]() 1970 GMC Sierra Grande 402/TH400 (Longhorn)14 years and counting rebuild! 1975 (Build) Chevrolet SWB 4X4 350 SB Lifted 6 inches 1970 Ford F250 Ranger 390 BB 2010 Ford Super Duty F250 XLT W/4 inch lift kit and Pro Comp Tires Hub Cap Freak! ![]() ![]() ![]() I'M IN THE MARKET...AS IT WERE! |
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#4 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: TH400 Pan Gasket-Glue or no Glue?
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#5 |
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Join Date: Apr 2006
Location: MinneSNOWta
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Re: TH400 Pan Gasket-Glue or no Glue?
![]() Do not overtighten or you will get leaks for sure.
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2003 GMC Sierra 1500 WT 1995 Nissan Hardbody 2016 Hyundai Veloster Turbo DC2 (SW/AW) Clyde W. Harvey USN "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery" Winston Churchill |
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#6 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: TH400 Pan Gasket-Glue or no Glue?
I usually use a 1/4' ratchet held in the palm of my hand and tighten them snug with it. Any tighter and you'll distort the pan enough to leak.
__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#7 |
Registered User
![]() Join Date: Feb 2001
Location: East Central, MO
Posts: 11,336
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Re: TH400 Pan Gasket-Glue or no Glue?
Good info. They can be a pain if you don't follow these guys tips.
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#8 |
Registered User
Join Date: Apr 2005
Location: BC, Canada
Posts: 122
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Re: TH400 Pan Gasket-Glue or no Glue?
Nothing wrong with cork. Take bearing grease (the green stuff will do, synthetic works better if you can afford it) and apply it to the cork gasket. Also put grease where the gasket sits on the tranny pan. Why do this? Grease slows the cork down from drying out and getting crusty. Also prevents the gasket from moving around during installation. Works really good. I took the oil pan off my 305 recently (little under 2 years since I did it) and it came out in one piece. Never use silicon. Two bolts stripped on my dad's jeep and I had to heli-coil them because some assclown used silicon on the tranny pan. Not to mention I almost warped the pan trying to get it unstuck.
Last edited by Morgsie; 02-16-2007 at 05:42 AM. |
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#9 |
Registered User
![]() Join Date: Nov 2000
Location: chimayo, nm, usa
Posts: 898
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Re: TH400 Pan Gasket-Glue or no Glue?
Thanks, what about using locktite on the pan bolts, or do these not have a tendency to come loose? Also is there a certain pattern for tightening the bolts?
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#10 |
Senior Member
![]() Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,873
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Re: TH400 Pan Gasket-Glue or no Glue?
No sealer.And there's no pattern really because you hopefully won't be tightening enough to distort the pan.
I used to manage a trans shop and we would ALWAYS tell the customer to bring it back in a week or two so we could re-torque the bolts. Otherwise many customers would come back *****ing and moaning about how we did a lousy job and they see a leak! This is with a cork gasket.check them in a week,but DO NOT just cinch them up real tight either the 1st time,or when re-torquing or you will bend the pan and then you might get a leak. We used to routinely pound out the pans(to make the sealing surface flat again) from other people over torquing them.-Brian
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
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#11 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: TH400 Pan Gasket-Glue or no Glue?
I don't use locktite, haven't had any problems. As for a torque sequence I always use a star pattern (unless it calls for a specific sequence such as head bolts). Snug all the bolts finger tight (NEVER EVER TIGHTEN A BOLT W/O HAVING THEM ALL STARTED), then start on one corner, go to the opposite corner, then one of the other corners, then it's opposite. Then split the difference between the corners in the same general pattern, do this until they are all tight. Then check them all one last time. This is the way I tighten everything to make sure the gaskets are evenly compressed and everything is good and tight. If you don't check them all one last time I guarantee the first ones you tightened will not be as tight as you thought they were.
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#12 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: TH400 Pan Gasket-Glue or no Glue?
PS I'm not an auto mechanic, I do most of my wrenching in industrial situations, so that's why I do things the way I do them.
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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