A free mod to prevent the transmission killing "Strawberry Milkshake Of Death" that kills many of the 20052010 Xterras, Pathfinders and Frontiers.

This is not needed for any Xterra/Frontier/Pathfinder made before 2005
This is not needed for any Xterra/Frontier/Pathfinder made after 2010
This is not needed for any manual transmission Xterra or Frontier
This is not needed for any V8 pathfinder

All V6 Auto Xterra/Frontier/Pathfinder 2005+ should have a secondary trans cooler behind the grill; in front of the radiator.

What is SMOD? Early models had faulty radiator design from the manufacturer Calsonic. The radiator handles coolant and transmission fluid. These fluids can mix when the partition fails. When the coolant and transmission fluid mix, it creates a substance that looks like melted strawberry milkshake. This substance will cause erratic and poor operation of the transmission. Many times this destroys the circuitry in the transmission valve body requiring a new valve body and/or transmission. This is an extremely common failure that has been discussed countless times in the Nissan communities.

This bypass removes the risk of the coolant and transmission fluid breaching at the expense of cooling the transmission. This is ideal for anyone who just learned about the issue to get in there and 1st, prevent the issue and 2nd, have some time to choose and order a replacement radiator. This bypass is not supposed to be a long term setup. Certain driving conditions can generate heat that the trans cooler can't handle effectively. Low vehicle speeds with throttle input can create excessive heat. Offroading and towing can create excessive heat.
Generally speaking, any newly manufactured radiator should be suitable and more reliable than the defective OEM radiators from years past.

If you have a 2010 model, you may not need to bypass if you have radiator part number 21460ZL31A on the top of your radiator. This part number may have been used on some models that year and is allegedly a part number that's exempt from SMOD.
All other 20052010 parts numbers are
21410EA200
21410EA205
21460EA215
21460EA265
21460ZL11A
These are known to be susceptible to SMOD or suspected to be susceptible to SMOD according to https://www.thenewx.org/threads/list...
Part number 214609CAOE is the latest part number. Used in the later models and may show up in older models if a replacement occurred.