th 350 trans Q

[marq]

Anyone know which trans cooler pipe is which.Is the top pipe going to the cooler and the bottom pipe returning from the cooler or is it the other way around?I'm confused............Marq

[CURIOUS RASH]

<font color="green"> That is a good question!

I've never thought about it as I don't run them through the radiator.

My theory is that it is hard enough to keep the water cool, why run the Tranny fluid through there also?

It doesn't really matter unless you have a top to bottom setup in the radiator, then you want the feed in the top and return from the bottom.

Maybe give her some turns if you can and see which one squirts?

RASHY </font>

[REVEREND JAKE]

It doesn't matter. It's just another channel for fluid to go through to help it cool. If you are using an aftermarket cooler it doesn't matter.

Hope that helps.
Rev. Jake Toocool

[draggin'GTO]

[ QUOTE ]
Anyone know which trans cooler pipe is which.Is the top pipe going to the cooler and the bottom pipe returning from the cooler or is it the other way around?I'm confused............Marq

[/ QUOTE ]
The bottom fitting on the trans sends hot fluid to the trans cooler, the upper one is the return fitting.

The lower trans cooler feed line goes to the bottom fitting of the trans cooler in the radiator (cross-flow radiator with side tanks). I'm guessing that's to drive any air pockets or bubbles out of the system.

[cosmo]

The reason for it to go through the radiator has less to do with cooling the fluid than it does with holding the fluid at a certain temperature.
Oh, yes, it cools the trans fluid fine in the summer, but come winter, you want that fluid to come up to temperature and stay there for proper operation, which is why the fluid goes through the radiator.
Aftermarket coolers are great for towing and heavy duty, but I always plumb them through the radiator as well.
Cosmo

[CURIOUS RASH]

<font color="green">That's interesting, I never thought about it maintaining a certain temp.

Damn, I learn something new everyday.

Not about to have my radiator rebuilt though!

Every fluid cooling radiator I have ever plumbed had the feed come into the top and return from the bottom, I was always told that this is so the pump doesn't have to work to pump it into, up and out.

We use some giant 4 foot square radiators to run the hydraulic fluid through in the top and out the bottom.

I'm interested if there is a different theory here.

RASHY </font>

[Crosley]

It does not matter what tranny cooler line is hooked top or bottom or sideways to a cooler.

The cooling system on a t-350 is under 20 - 50 psi depending on a stock OE unit or one that has shift mods to it &amp; where your foot is on the loud pedal.

With this psi in the system that is why it is unwise to run a cheap rubber hose on the cooler lines.

THe cooler system flows around 2-4 quarts per minute again depending on how hard the pedal is pushed. You don't need any gawd damn gravity or other shit for the fluid to flow through the lines.

Why does the tranny flow more with more loud pedal pushing??

the vacuum drops waaay down, the modualtor raises the main line pressure UP

[CURIOUS RASH]

<font color="green">That's good info Crosley.

So, if I'm just running a frame mounted cooler (and I am) do you think I'm shortening the life of my tranny?

If so, do you have any suggestions that may help, apart from running it through the radiator?

Thanks for answering all my stupid questions.

RASHY </font>

[Crosley]

If the tranny is running HOT , the life span drops.

Is your tranny running HOT? Is the fluid burned?


Running tranny fluid through the radiator cooler is good in cold climates in the winter. In mild climates it does not matter, simply run a quality cooler with good lines to avoid a blow out.

Tranny fluid goes up in smoke and <font color="red">Flames </font> easily on exhaust pipes! Tires lose traction on oily roadways


[ QUOTE ]
<font color="green">That's good info Crosley.

So, if I'm just running a frame mounted cooler (and I am) do you think I'm shortening the life of my tranny?

If so, do you have any suggestions that may help, apart from running it through the radiator?

Thanks for answering all my stupid questions.

RASHY </font>

[/ QUOTE ]

[Nads]

Crosley, been there, done that.
I had the brakes lock on my '57 Chevy, I tried to drive her the rest of 4 blocks home when WHOOSH. The tranny fluid came out of the filler tube and hit the headers and went up in flames.
I had hidden hood pins to lock my hood. It seemed like forever before I got the hood opened, my ex wife rushed into a back yard and found a barbecue grille lid that she filled with water.
We dumped it on the fire and it went, out otherwise the car would've burned to the ground.
the fire left a really nice singed spot.

[marq]

What about running real good quality rubber lines designed for hot oil like p6?i know they use it in industry but it's about $!2 a yard......Marq

[CURIOUS RASH]

[ QUOTE ]
If the tranny is running HOT , the life span drops.

Is your tranny running HOT? Is the fluid burned?


Running tranny fluid through the radiator cooler is good in cold climates in the winter. In mild climates it does not matter, simply run a quality cooler with good lines to avoid a blow out.

Tranny fluid goes up in smoke and <font color="red">Flames </font> easily on exhaust pipes! Tires lose traction on oily roadways


[ QUOTE ]
<font color="green">That's good info Crosley.

So, if I'm just running a frame mounted cooler (and I am) do you think I'm shortening the life of my tranny?

If so, do you have any suggestions that may help, apart from running it through the radiator?

Thanks for answering all my stupid questions.

RASHY </font>

[/ QUOTE ]

[/ QUOTE ]

<font color="green"> No, it doesn't run hot and doesn't stay in there long enough to burn http://www.jalopyjournal.com/ubbthreads/images/graemlins/smirk.gif

Thanks for the info, I guess I will need to stop applying how we do things at work to the rest of the world.

You'd think my pay check would have taught me that already! http://www.jalopyjournal.com/ubbthreads/images/graemlins/tongue.gif

I do have a good frame mounted cooler and it is hooked up with the lines that came with it so I should be alright.


RASHY </font>

[oldchevyseller]

my book says all GM automatics, fluid out is bottom fitting, fluid in is top

[Crosley]

[ QUOTE ]
my book says all GM automatics, fluid out is bottom fitting, fluid in is top




[/ QUOTE ]


Your book is wrong

An example would be the 200-4r. bottom line is return.

Still makes no difference in cooler hook up. There should be no check valves in the cooling system of the t-350 .

http://www.jalopyjournal.com/ubbthreads/images/graemlins/cool.gif

[oldchevyseller]

well gee my books dont go into all these new fangled transmissions, http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif

[CURIOUS RASH]

[ QUOTE ]
[ QUOTE ]
my book says all GM automatics, fluid out is bottom fitting, fluid in is top




[/ QUOTE ]


Your book is wrong

An example would be the 200-4r. bottom line is return.

Still makes no difference in cooler hook up. There should be no check valves in the cooling system of the t-350 .

http://www.jalopyjournal.com/ubbthreads/images/graemlins/cool.gif

[/ QUOTE ]

<font color="green">Didn't you two just say the same thing?

And, isn't it what I said way up there at the top?

</font>

[oldchevyseller]

i need my meds. http://www.jalopyjournal.com/ubbthreads/images/graemlins/confused.gif

[Crosley]

Nope.

we are talking about the fittings at the tranny case.

He posted that ALL GM autos had the bottom cooler fitting as the "out" from the case. The return is the top cooler fitting.

This is not true on several rear wheel drive GM automatic trannys. His info came from an old book with info on the current trannys at the time the book was published.


[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
my book says all GM automatics, fluid out is bottom fitting, fluid in is top




[/ QUOTE ]


Your book is wrong

An example would be the 200-4r. bottom line is return.

Still makes no difference in cooler hook up. There should be no check valves in the cooling system of the t-350 .

http://www.jalopyjournal.com/ubbthreads/images/graemlins/cool.gif

[/ QUOTE ]

<font color="green">Didn't you two just say the same thing?

And, isn't it what I said way up there at the top?

</font>

[/ QUOTE ]

[oldchevyseller]

no wonder i drive a 4sp manual http://www.jalopyjournal.com/ubbthreads/images/graemlins/tongue.gif

[CURIOUS RASH]

<font color="green">AL bad at the downshift cable.

The cable has the boot type seal, not o-ring.

That seal is messed up. Is it possibe to get just that seal or should I just use some sealant?

Which sealant and what do you suggest I clean the area with first to ensure a good seal?

Thanks,

RASHY </font>

[Crosley]

most tranny shops have that sealing sleeve separate.

the sleeve MUST be installed into the case first! Do NOT install the sleeve onto the cable and then push both into the hole in the tranny case. Ruins the sleeve every time.

Same deal on filler tubes with a sealing sleeve. Install the sleeve into the tranny case first.

sillycone only on the cable will develope a leak

[ QUOTE ]
<font color="green">AL bad at the downshift cable.

The cable has the boot type seal, not o-ring.

That seal is messed up. Is it possibe to get just that seal or should I just use some sealant?

Which sealant and what do you suggest I clean the area with first to ensure a good seal?

Thanks,

RASHY </font>

[/ QUOTE ]

[CURIOUS RASH]

[ QUOTE ]
the sleeve MUST be installed into the case first! Do NOT install the sleeve onto the cable and then push both into the hole in the tranny case. Ruins the sleeve every time.

[/ QUOTE ] <font color="green">Why the hell didn't that occur to me?

And THAT folks, is why I love this place.

I had two of the damn things and ruined them both.

Thanks alot.

Now to find a tranny shop that I can muster the courage to enter....

THANKS!!! RASHY</font>