Jump to content

Due to a hardware failure on the hosts systems, all posts and messages created between May 26th and Jan 13th have been lost. Additionally, if you joined the NPORA Forums community during that time, you'll need to re-register. -NPORA Mod Team *Updated: 05/19/2022 12:15AM PST

Transmission Operating Temp


19Pathy94se30
 Share

Recommended Posts

Thank you very much!!! I had been scouring the net but apparently not in the right places. I think because of the shotty stock transmission cooler system it’s making my engine over heat on the trail but street driving it’s fine. My plan is to buy an external cooler and fan assembly and a temp controller as well but I wasn’t too sure what the range was. I hope this helps future folks as well!!


Sent from my iPhone using Tapatalk

Link to comment
Share on other sites

I gave the FSM a quick scour, but didn't see anything in particular. Good actual numbers like adamzan gave are best, though.

 

You definitely want to upgrade to an external cooler. I did it for mine, albeit too late, and it even made my coolant run less hot. I didn't use a fan for the trans cooler, though, you might seen even better temps.

  • Like 1
Link to comment
Share on other sites

10 hours ago, 19Pathy94se30 said:

 

Does anyone have a clue as to what the normal operating temp is on a normal A/T pathfinder is? I can’t seem to find the info anywhere. WD21.

 

 

Sent from my iPhone using Tapatalk

 

 

This may help, http://www.nissanpathfinders.net/forum/topic/45134-help-identifying-some-hosepiping-94-pathfinder/?tab=comments#comment-812720

Edited by xylicon
Link to comment
Share on other sites

  • 4 weeks later...

There's no way the transmission cooler would cause the engine to overheat. There is a huge amount of surface area in the radiator and the trans cooler is just a small tube sitting in the bottom tank. If the engine is overheating at low speeds I would investigate the fan clutch.

Edited by adamzan
Link to comment
Share on other sites

If you’ve already got something going on creating excessive heat beyond what the radiator was spec’d to remove, or like what was said above about the fan clutch, you would want to fix that first.

I experience excessive heat buildup, I assume from friction of a worn engine/oil pump and I ended up installing an electric radiator fan as a countermeasure.

Before that I installed a trans cooler and bypassed the one integrated in the radiator. I did notice that coolant temps were slower to rise after the external cooler but continued to rise indefinitely.

Like was said above, the integrated trans cooler just doesn’t have the surface area to overcome the much much larger surface area of the radiator core. Turning the heater on to bring coolant temps down works because that heat exchanger is quite big.

  • Like 1
Link to comment
Share on other sites

AFAIK engine wear and low oil pressure don't generally heat the whole engine, just whichever bearing(s) get the short end of the oil supply, and they don't suffer in silence for long. On an engine that's overheating but not obviously beating itself to death, I'd expect retarded ignition timing, restricted airflow, or a fault with the cooling system rather than a lube issue.

 

I'd be concerned for the trans if it was making enough heat to overwhelm the engine's cooling system, but adding a cooler to the system certainly won't hurt anything. The only time I've had mine overheat was going up a tight windy mountain pass in 100°+ weather with the aircon blasting. Pulling over or turning off the aircon got the temp back down in a hurry, though like OSB said, running the heater is also a good way to dump some engine heat if you need to.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

Welcome to NPORA Forums

 

Please register to gain full access to the forum.

Make sure you read the Forum Guidelines and don't forget to post a new intro in the New People Start Here! section, to say hi too everyone.

 

-NPORA

×
×
  • Create New...