My OEM radiator in my 2007 350z 5at is cracked - coolant leaks out from the top and it's getting worse day by day so I'm looking for a replacement. I'd like to go aftermarket if possible, the car does get driven pretty hard and I'd prefer the reliability of an aluminum unit.

My problem is that I can't find any aftermarket radiators that directly replace the OEM for the automatic transmission - I'm hoping to do this myself and have no means of fabrication so I'm looking for something I can just drop in. Is there a unit that comes with the transmission cooler built in, like the oem one did, or perhaps a transmission cooler that will bolt directly on with no fabrication needed? I've spent the last hour looking and couldn't find much - hopefully someone can point me in the right direction.

 

Been researchin myself for future forced induction. Seen a oem cheap on Z1 motorsport . I'm lookin at the mishimoto which none have built in tranny cooler so adding a tranny cooler separate. czp and thm have radiator for round $280 plus free shippin. Then tranny cooler for round 110. My ? is theres a 15.5" cooler with 12 core for $110 and a 20" cooler with a 20 core for $90. There also some with fans. Since we would be removing tranny option thru oem radiator, plus me future TT or SC should we go with the larger or is there such a thing as to big? Advice to ya is shop around. Seen that radiator as high as $380 on some sites.

 

B&M make transmission coolers, but make sure you also get a temperature controlled thermostat or oil thermostat, Derail makes one.

Hayden also makes coolers

 

I just posted a similar question on another thread. Many have ran a trans. cooler totally independent of the factory setup & others have run a small cooler inline with the existing oem setup. Some mention a thermostatic temperature control & others do not in both scenarios.
If you run a cooler inline with the existing oem setup, is a thermostatic temperature control really necessary or even desirable?