Transmission Cooler

MILENKOGT

A good trans cooler option that is a low pressure drop bar and plate style would be the Trucool SR4588.

Fluids you'd want to use Nissan Matic-S or compatible. Such as Castrol Transmax Full synthetic multivehicle. Staying on top of your service intervals is equally important, and further compounded on how you drive the vehicle.

For the RE5R05A and RE7R01A/B there are shift kits available. Level 10 offers valve body upgrades for both with upgraded solenoids, their own shift kit, and revisions to parts that are prone to failure. SONNAX is also provides valvebody upgrades and replacement parts for the RE5R05A, not sure of the RE7 though.

Transgo offers shift kit for the RE5R05A as well. (not the RE7)

The above coupled with a competent tuner who can adjust your expected torque values in Uprev (not sure with EcuTek), your 5spd or 7spd should handle whatever you throw at it for many years, especially being naturally aspirated.

Be mindful of fluid temp before going beating the piss out of the vehicle under WOT as well.

If you want to further upgrade your transmission, Level 10 has a full build options where they use the aformentioned valvebody upgrade, but also include Borg Warner clutch packs (frictions), +1 extra frictions in the Input and Direct drums for better holding capacity, modified/enlarged fluid pump, cryo treated output shaft option, etc etc. (for the RE5R05A, the RE7 gets similar upgrades). Apparently the owner of Level 10 (Pat) is good friends with whoever manages the clutch/friction division of Borg Warner.

You could go as far as to WPC treating or REM finishing the planetary gear sets, shaft splines too if you wanted.

Albeit, no transmission tuning short of what uprev/ecuteck allows. I guess you could try for PCS-2000 Powertrain control systems standalone and purchase their harness with software to try it out.

Or wait and see if HPtuners provides support for either transmission (doubtful, but hopeful).

Lastly, once Circle D Specialties finishes my converter for my Titan, they may be willing to start production with the Re5r05a converters tailored to your build. I imagine if someone sent in a 7spd RE7 factory stock converter to build they would do so. They are building a billet cnc stator for mine that is one off. But will allow a basis to start from. Its another option over Level 10 and Edge.

So yeah, get a transmission cooler.

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2008 Nissan Titan Crew Cab 2wd
JWT C8/S7 cam package, Full Bolt ons
372rwhp/447rwtq Uprev Tuned @ Z1 Motorsports