Hello. this is my first post and I'm very new to this. I have a problem with my 2003 350z. I'm currently in the process of swapping the motor. I'm very close to the finish line. Except I can't find my trans cooler lines. and I'm extremely scared that I will need to tear it all back apart to put it the lines. at this point Im very close to giving up and I'm looking for anything that can help. Pictures, videos, anything that can help me. I have to many questions that I can't find anywhere.

 

Welcome- moved your thread to a more appropriate forum. Perhaps it would help to read the FSM to gain a few more details about your '03 Z. Here's a link to an online set that you'll need to select your year and model to start reading:

Nissan Service Manuals - NICOclub

 

What do you mean you can’t find them?

Like you physcially lost them?

If you lost them you can purchase Mxyz by AN6 fittings and run high pressure (300psi to 400psi max pressure rated) hose that is meant for ATF and re-run them up to your cooler. It may be wise to upgrade your cooler as well. I dont know all the hose sizes for auto transmissions but I think OEM is 5/16” hose which is slightly smaller than AN -6.

Let me know if you have further questions and/or if you need the fitting size for the transmission - I did this on my q40 and have had no issues.