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TH350 guys got a quick question...

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Old Jun 15, 2005 | 09:30 AM
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Default TH350 guys got a quick question...

I have a B&M deep aluminum pan I'm about to start on my 4th gasket. I can't seem to stop the leaks I'm getting. Each time I'm trying a different gasket. I want to make sure I do this for the last time . What are the torque specs on the pan bolts on this tranny? And do I need to use some silicone on the pan side? Thanks in advance....

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Old Jun 15, 2005 | 10:25 AM
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Don't torque too tight is the first thing.. Most people play Conan the Car Mechanic when they tighten anything with a gasket, and end up squeezing the gasket out. Try around 18-22 lb. ft. and see how that works out.
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Old Jun 15, 2005 | 11:05 AM
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Sometimes with those deep pans, they aren't exactly flat. Try a little bit of the RED goo on the pan, the gasket, etc. and then I torque mine down to 10 ft.lbs. RED goo is High Temp. silicone sealer....fwiw.

You can also check for true flat-ness of the unti by placing it upside down on a known flat surface - your mom's marble counter-top, a Craftsman or Snap-on tool cart, etc. and take a feeler gauge and see if it slips underneath...or if you can see daylight in any places.
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Old Jun 15, 2005 | 04:49 PM
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if you come up with a solution let me know i've had the same problems with a th-350 and a c6, i tried silicone, weather strip adhesive, etc., it doesn't matter, if the vehicle sits for more than a day it leaks like the exxon valdez...
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Old Jun 15, 2005 | 05:00 PM
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I will take another stab at it on Friday..I should know something by Sunday and Monday. I'll let u know
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Old Jun 15, 2005 | 09:18 PM
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ok, i have very good results if you can find someone to sell you the gasket. i have to cuss and most of the idiots around here to get it.

fel pro brand gasket. this is gasket ONLY. not a filter/gasket kit.
comes in a big cardboard box like all the rest of there gaskets.

i use the nasty brown permatex, and let it sit overnight.
barely torque things down then go back and snug them.
i do this with a 1/4 ratchet.

my only problem now is a front pump seal. OUCH!
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Old Jun 16, 2005 | 04:54 AM
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I find almost every aftermarket pan leaks, the standard pans are good but most still leak, I'd use a gasket sealer as well, not too much.

I like to nip the bolts up in my own little sequence, just nip tight, so you dont strip any threads and they dont rattle loose.

After about 1/2-1 hours of operation re-nip the bolts up a touch tighter as they will be a little loose after heat.

Like anything that gets hot you need to re-tighten 2-3 times and then your normally right.
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Old Jun 16, 2005 | 09:43 AM
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Thanks for the input guys...everyone has their on little tricks.
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Old Jun 16, 2005 | 04:53 PM
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Originally Posted by GTS346
I find almost every aftermarket pan leaks, the standard pans are good but most still leak, I'd use a gasket sealer as well, not too much.

I like to nip the bolts up in my own little sequence, just nip tight, so you dont strip any threads and they dont rattle loose.

After about 1/2-1 hours of operation re-nip the bolts up a touch tighter as they will be a little loose after heat.

Like anything that gets hot you need to re-tighten 2-3 times and then your normally right.
i do the same thing. tighten about 4 times, then im happy.
prolly only 1-2pd ft per time, but enough to matter.
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Old Jun 16, 2005 | 08:36 PM
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When I worked in the trans shop we used to put the edge of the pan resting on the workbench. Then put the ball end of a ballpeen hamer over the hole. Give it 2 or 3 wacks with antother hammer not to hard, to knock out the bolt holes a little. tighten it down evenly like a head gasket do on bolt first then 1 on the other side and so on. Used to work good on stock pans, I dont know about some of the aftermarket ones.
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Old Jun 17, 2005 | 09:41 AM
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Originally Posted by StickSS
When I worked in the trans shop we used to put the edge of the pan resting on the workbench. Then put the ball end of a ballpeen hamer over the hole. Give it 2 or 3 wacks with antother hammer not to hard, to knock out the bolt holes a little. tighten it down evenly like a head gasket do on bolt first then 1 on the other side and so on. Used to work good on stock pans, I dont know about some of the aftermarket ones.

That won't work with this pan....
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