Hi All;
Does anyone know the location of the Transmission Cooler Line? Is it by the radiator? Thanks!

 

there is no trans cooler in the 430sc. side of trans to bottom of rad. that's what you mean'

 

Are those the two lines coming from the pan? Is there a way to identify these lines? Which one goes runs fluid in and which one runs fluid out? THANKS

 

what are you trying to do?

 

Trying to determine whether I can install a trans cooler; I have a high stall torque converter and I'm worried about heat..

 

see slvbullet thread he installed a cooler in his I think look at his setup.

 

Tie the new auxiliary radiator to the return line coming off the main radiator.

https://www.clublexus.com/forums/sc-...with-pics.html

 

How do I know which one is the return line?

 

It appears that the transmission cooler return line is at the bottom of the radiator on the drivers side, per the diagram below? Can anyone confirm?




Is 32922A the transmission cooler return line?

 

That is correct. The curved line on the driver's side is the line that returns the transmission fluid to the transmission after it has been cooled in the radiator.

However, in the spirit of "measure three times and cut once" (so that you are sure that the fluid is cooled by the main radiator first), you should test this by disconnecting the driver's side line and putting the disconnected rubber tube in a waste container. Then connect a short length of rubber tube to the radiator nipple and run it to another waste container. Then turn on the engine for a few second. If fluid comes out of the radiator through the temporarily connected tube you know this is the return line.

Some use this technique to renew their transmission fluid. Mark the waste container with 1, 2 and 3 quart marks by measuring with water first. Then turn the engine on for about 10 seconds and about 1 quart of old fluid should come out. Then add 1 quart of fresh fluid through the dipstick neck. Repeat the process.

If you use a clear tube on the radiator nipple, you can see the old fluid color, and when the color finally changes to a brighter color you know you have mostly fresh fluid coming through and are done. It normally takes about 8-10 quarts of transmission fluid.

 

Just to summarize, I can disconnect the value indicated by the orange valve below. If ATF comes out, then that is the Transmission Cooler Return line, and I would use this line to install the Transmission Cooler. Thanks for your help!

 

Actually, when you disconnect the return line and run the engine, nothing will come out of it (it only carries the fluid back to the transmission from the radiator).

The fluid should come out of the radiator at the nipple you just removed the above hose from (or out of the temporary hose connected to that nipple if you don't want a mess on the floor).

You want to connect the line running to the new radiator input from the nipple on the old radiator where the return hose was connected before. Then the output nipple on the new radiator will connect to the return line you disconnected from the old radiator.

See my crude drawing.

 

Got it! Thanks!!