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Old 09-04-2013, 06:36 AM   #1
Mark B
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What is this external metal tube on a TH350?

What is the little metal tube coming out the side top of a TH350?
This trans is going behind an inline 6 into my truck.
thanks
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Old 09-04-2013, 06:52 AM   #2
jsbgump
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Re: What is this external metal tube on a TH350?

Its a vent tube
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Old 09-04-2013, 08:36 AM   #3
Ol Blue K20
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Re: What is this external metal tube on a TH350?

It's just the vent, nothing hooks up to it
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Old 09-04-2013, 02:06 PM   #4
JointTech
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Re: What is this external metal tube on a TH350?

i put a rubber hose on it so if it does vent its below the tranny and doesnt leak all over my stuff.
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Old 09-06-2013, 02:28 AM   #5
luvbowties
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Angry Re: What is this external metal tube on a TH350?

Dirt daubers can plug that hole and cause even a newly-rebuilt tranny to blow out the seals--know a guy who had it happen twice on his 'collector cars'. Only after the 2nd one did they figure what was causing it.
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