FINAL ANSWER...Which trans cooler line is return?
Thread Starter
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
FINAL ANSWER...Which trans cooler line is return? 3 years ago when I installed my trans cooler I spliced into the stock trans cooler line coming out of the bottom of the radiator, then into my B&M cooler.
I really didn't give it much thought, for some reason I was sure the bottom stock line was the return line. BUT, after reading some stuff it seems that the top stock line coming from the top of the radiator is the actual return line. So the ideal way to hook up the cooler would then be to splice into the top line thus sending the fluid through the aftermarket cooler AFTER the stock cooler.
So I need the FINAL answer here... which line is the return line? The top line? Is the top line what everyone is using for their coolers?
PS. I've already switched the cooler to the top line as it seems that is the correct way, but I'd like to confirm once and for all....
I really didn't give it much thought, for some reason I was sure the bottom stock line was the return line. BUT, after reading some stuff it seems that the top stock line coming from the top of the radiator is the actual return line. So the ideal way to hook up the cooler would then be to splice into the top line thus sending the fluid through the aftermarket cooler AFTER the stock cooler.
So I need the FINAL answer here... which line is the return line? The top line? Is the top line what everyone is using for their coolers?
PS. I've already switched the cooler to the top line as it seems that is the correct way, but I'd like to confirm once and for all....
TECH Enthusiast
Joined: Jan 2002
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From: Orange Park, FL
Ryan, I have always wondered the same thing. I did alot of research trying to figure it out when I put mine on 2 years ago. I never got the DEFINITE answer though. The TRUE answer probably will come from someone that knows the 4L60E:
Which fitting on the tranny case is OUT and which is IN?
Chuck (FLP) could probably tell you. If you talk to him and he knows be sure to let us all know!!
Which fitting on the tranny case is OUT and which is IN?
Chuck (FLP) could probably tell you. If you talk to him and he knows be sure to let us all know!!
Thread Starter
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
Hi Chris 
You know, I was just at FLP about a month ago and I didn't even think to ask. I should have.
The on-line install guide I've seen says that the top line is the return line, but I want to get solid answer.
You know, I was just at FLP about a month ago and I didn't even think to ask. I should have.
The on-line install guide I've seen says that the top line is the return line, but I want to get solid answer.
When i did mine i had the same problem. Actually i don't have any lines directly connected to the stock cooler from the B&M Supercooler. The top line is the return line. Bottom line is the trans to the cooler line.
Thread Starter
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
Originally Posted by 2001 White Ws6
Actually i don't have any lines directly connected to the stock cooler from the B&M Supercooler.
So the top line is the return line, that's what I was leaning towrds. You're talking about the top line on the radiator, correct? That's the one to use?
TECH Apprentice
Joined: Oct 2002
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I used the B&M and the stock cooler. connected the top stock line to another line to my B&M then connected the other line from the B&M to the top hole on the stock cooler, works great. I only assumed it was the return, otherwise that POS slip fitting of the hose onto the metal at the bottom w/ a clip wouldnt stay on at high pressure
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Thread Starter
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
Originally Posted by BYOFICR
I only assumed it was the return, otherwise that POS slip fitting of the hose onto the metal at the bottom w/ a clip wouldnt stay on at high pressure
BTW, I had the cooler hooked up to the bottom line (apperently the out-of-trans line) for 3 years and it never leaked with just hose clamps on the B&M hose. I now have a piece of rubber trans line there again with clamps and there is no leak (I did use strong clamps well tightened though)...
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TECH Enthusiast
Joined: Jan 2002
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From: Helendale, Ca (SilverLakes)
Final answer. The Top line on the radiator/trans cooler is the return line. If you bought a new B&M super cooler rated at 24,000 gvw; these instructions would have been in the box. It is a simple hookup and all parts are included in the box.
Originally Posted by RPM WS6
How did you run your B&M lines then? Just wondering how you set that up?
So the top line is the return line, that's what I was leaning towrds. You're talking about the top line on the radiator, correct? That's the one to use?
So the top line is the return line, that's what I was leaning towrds. You're talking about the top line on the radiator, correct? That's the one to use?
Thread Starter
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
Originally Posted by 2001 White Ws6
I guess that finally know and now that i understand it fully i'll probably change it.
It sounds like this is the correct way, and that's exactly the way I have mine setup now.
As far as the B&M instructions stating which line is the return line, I actually was able to find my instruction sheet from years back, and it did not list 4L60E info. However it did list 700R4 and 4L80E
I would guess that the 700R4 info would be the same as a 4L60E.... 