2007 pathfinder coolant leak

Asked by Jun 19, 2017 at 03:28 AM about the 2007 Nissan Pathfinder SE 4X4

Question type: Maintenance & Repair

I recently heard about 07 pathfinders having
coolant leaking into transmission fluid causing
transmission failure. Can i check my transmission
fluid and see if coolant has been mixing in? Seems
like most people encounter problem before 100k
miles so with 130k miles is there a good chance
my coolant isnt leaking into trans? Is there
something I can do now such as a seperate trans
cooler? Any advice appriciated, thanks

2 Answers


check your coolant reservoir the coolant will look like milk if atf is mixing with the coolant it is caused by the transmission cooler developing a leak change your radiator to avoid this issue

1 of 1 people found this helpful.

Coolant can also go into the transmission and NOT the coolant reservoir so you need to take a look at the transmission fluid. If you only examine the coolant for the presence of transmission fluid you may miss it. You could install a stand alone transmission cooler and disconnect the transmission cooler loop that is inside the radiator and plug the connections at the radiator.

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