Trans Cooler Question? - Team Camaro Tech
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post #1 of 7 (permalink) Old Mar 26th, 01, 10:23 AM Thread Starter
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Does it matter which line goes where? Are the transmission lines in and out or how will I know which hose to run where. Is top line in and bottom line out?
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post #2 of 7 (permalink) Old Mar 26th, 01, 02:16 PM
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If you are running a independent cooler like a B&M cooler it won't make a difference, but I'm not sure which one is which if your using your stock radiator. You would be better off using a independent cooler.
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post #3 of 7 (permalink) Old Mar 26th, 01, 04:47 PM
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You are going to have to supply some more info. Trans. type, radiator cooler, external cooler or both. Also are you asking top and bottom on the trans. end or on the radiator end.

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Robert

'69 getting better every day... (every pay day)
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post #4 of 7 (permalink) Old Mar 26th, 01, 05:14 PM
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I believe you're talking about the tank in the radiator. It's been debated before and I personally don't think it matters. If you buy new pre-bent lines they should match up the way chevy wanted them...

Here's the debate. Side "A" Into the core from the bottom. Out to the trans from the top! Reason given; filled from the bottom up, no chance of trapped air in the system. Also will stay in the core longer for more cooling effect!! Side "B" Rebutal; Unlike the cooling system there is a vent in the tranny so it's not a closed system. Air will find it's way out!! Once the system is in service the fluid will be pumped through the core so it won't stay in the core any longer going up hill or down!

If your system is already plumbed just figure out which is the output from the rad core and route it through the external.. By all means use both!! Radiator first them external...

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...Dennis
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post #5 of 7 (permalink) Old Mar 26th, 01, 05:43 PM
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In a TH350, the bottom line is the supply out of the trans to the radiator, top line is the return from the radiator to the trans. For best heat transfer you want the hot fluid going into the bottom of the radiator. This is where the coldest water in the radiator is so you will get maximum heat transfer. It also keeps the transmission side of the cooler full of fluid, since you are pumping it from the bottom up. If it flows from the top down the cooler doesn't stay full all the time since the fluid will flow to the bottom by gravity.

This configuration is especially important when you are using one of B&Ms plate coolers. You must always keep the cooler full of trans fluid, for the longest possible time for maximum heat transfer.

A TH350 will pump about 3 Qts of fluid at about 1500 RPM.


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Mark Canning
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post #6 of 7 (permalink) Old Mar 27th, 01, 09:41 AM Thread Starter
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I have a stock 305 with a 350 transmission. The cooler I bought was a Perma-Cool. This is what I did. Tell me if it's wrong because I read some stuff on other postings and I think I am.
The Radiator has two trans-lines on it. A top and a bottom. I but the top line with the top fitting on the trans cooler. Got the bottom line and put it with the bottom fitting on the trans cooler. And now I don't have any trans lines going into the radiator. Is this the way your suppose to do it. Or do I have to run from radiator to trans-cooler. And on the radiator is the bottom line an in or and out and vise versa.
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post #7 of 7 (permalink) Old Mar 27th, 01, 10:48 AM
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Now you are to the point of the same question on the other post with the same title, you need to read it if you haven't already.

I would connect the bottom line (out from trans) back to the radiator. Next out of the top of the radiator go into your ext. cooler then out of the ext. cooler back to the trans. (which was the original top line). Think of it as splicing the cooler into the top line. I had to buy addtional rubber line suited for trans fluid the get mine positioned where I needed it. I simply cut the top original metal line then connected the rubber lines from the ext. cooler to each end.

I hope all this makes sense, I wish we had a little scribble pad to draw your diagram. Anyone else that can word this better, jump right in.

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Robert

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