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ANOTHER guy purchasing used Pathfinder. Trans ?

 
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problematique



Joined: 30 Oct 2010
Posts: 9

PostPosted: Thu Jan 23, 2014 12:07 am    Post subject: ANOTHER guy purchasing used Pathfinder. Trans ? Reply with quote

Hey guys, I've been reading around and I want to make sure I'm clear. I just purchased a 2007 Path with 106,000 miles on it. I live in AZ where its pretty much hot most of the time and the rest of the time it's the devil's den.
So it looks like the course of action is to replace the radiator and all is well. Should I get a transmission flush to be on the safe side? How can I check the old radiator to confirm it wasn't leaking? Finally, can someone direct me to a good quality aftermarket radiator? I want to pick the correct brand without paying Nissan a bag of money.
I can't believe Nissan won't just give these out for free!
Thanks.
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unmeloy



Joined: 07 Nov 2013
Posts: 65
Location: Tyler, TX

PostPosted: Thu Jan 23, 2014 2:54 am    Post subject: Reply with quote

last time i tried to argue about the radiator replacement i got pissed so wont go there, but IMO i dont know of a replacement radiator that is immmune to the same issues that ours have. that being said on my pathy, my tranny cooler had not failed so i did the bypass. but if you pull your transmission dip stick and look at the fluid it should look like red clear cough medicine. it if looks milky like a strawberry milk shake then the transmission has been exposed to some radiator fluid. there is a thread on here how one person flushed and rebuilt their tranny but i cannot find where it is.
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problematique



Joined: 30 Oct 2010
Posts: 9

PostPosted: Thu Jan 23, 2014 7:56 am    Post subject: Reply with quote

Thanks for the info. From what I've seen there have been no reports of a replaced radiators failing in the same fashion. My only concern is deciding what brand is top quality.
I've seen reports of the "bypass" working , but I'd rather not bypass a component when I can just replace a faulty part for the correct part.
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problematique



Joined: 30 Oct 2010
Posts: 9

PostPosted: Thu Jan 23, 2014 8:10 am    Post subject: Reply with quote

Ok, wait. I did some more reading. So basically if I don't install a aftermarket cooler (or bypass), a new radiator could potentially still break and leak into the transmission....
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eieio
Sponsored Member


Joined: 17 Jul 2009
Posts: 1815
Location: Prescott, Az.

PostPosted: Thu Jan 23, 2014 8:35 am    Post subject: Reply with quote

problematique wrote:
Ok, wait. I did some more reading. So basically if I don't install a aftermarket cooler (or bypass), a new radiator could potentially still break and leak into the transmission....

any radiator with an internal transmission cooler has the "potential" to fail in this manner
the key word is "potential", which is not necessarily the same as "likelihood"
several posters here have installed aftermarket radiators that they seem happy with
no way (at this point) to know if the long-term reliability of these aftermarket replacements is better or worse than OEM radiators
the only way to 100% avoid the issue is to by-pass whatever radiator you have (or choose to get as a replacement)
many of us are by-passing, and only running the existing external transmission cooler, which seems to be sufficient for most trucks under most circumstances
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problematique



Joined: 30 Oct 2010
Posts: 9

PostPosted: Thu Jan 23, 2014 10:59 am    Post subject: Reply with quote

eieio wrote:

any radiator with an internal transmission cooler has the "potential" to fail in this manner
the key word is "potential", which is not necessarily the same as "likelihood"
several posters here have installed aftermarket radiators that they seem happy with
no way (at this point) to know if the long-term reliability of these aftermarket replacements is better or worse than OEM radiators
the only way to 100% avoid the issue is to by-pass whatever radiator you have (or choose to get as a replacement)
many of us are by-passing, and only running the existing external transmission cooler, which seems to be sufficient for most trucks under most circumstances


oK, I see. Well then I may just do the bypass. My concern is the heat here in Arizona. Won't this cause a problem since I'm removing a cooling component? I will not be doing any towing.
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unmeloy



Joined: 07 Nov 2013
Posts: 65
Location: Tyler, TX

PostPosted: Thu Jan 23, 2014 12:05 pm    Post subject: Reply with quote

some people have bypassed the internal cooler and added a secondary aftermarket cooler this is also an option easy to do
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eieio
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Joined: 17 Jul 2009
Posts: 1815
Location: Prescott, Az.

PostPosted: Thu Jan 23, 2014 12:49 pm    Post subject: Reply with quote

problematique wrote:

oK, I see. Well then I may just do the bypass. My concern is the heat here in Arizona. Won't this cause a problem since I'm removing a cooling component? I will not be doing any towing.

the internal cooler may be more valuable for trucks in cold climates as it will allow the trans fluid to attain proper operating temperatures sooner than without it
most do fine with the by-pass and no additional cooler, especially if not towing
you can also add a trans temp guage to be able to verify your trans temp, and modify accordingly if needed
i don't care for aftermarket stuff, so I'm sticking with the simple by-pass on both of my trucks
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disallow
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Joined: 13 Aug 2008
Posts: 2799
Location: Winnipeg, Canada

PostPosted: Thu Jan 23, 2014 1:12 pm    Post subject: Reply with quote

eieio wrote:
the internal cooler may be more valuable for trucks in cold climates as it will allow the trans fluid to attain proper operating temperatures sooner than without it
most do fine with the by-pass and no additional cooler, especially if not towing
you can also add a trans temp guage to be able to verify your trans temp, and modify accordingly if needed


I can speak to this. Regarding the cold temperatures, I have noticed that the first few shifts are a little rougher than before I did the bypass, when the transmission is cold. After about 1-2 minutes, the shifts resume the normal butter smooth shifts I am used to. I don't think this is a big deal, and my truck has 230000kms on it, 130000kms have been bypassed.

I also tow a large travel trailer in summer with my pathfinder, and have never had an issue with tranny overheating. I have not installed any additional external coolers, just have the factory Air/Oil cooler.

You can also get the Bully Dog tuner, which monitors the transmission temperature parameter, which negates the need to install a gauge and run all sorts of wires, install a sender, and find power for it.

Hope that helps.

t
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Terry in Winnipeg

'05 Pathfinder SE Premium 4x4 - 343000kms (213000mi) - weekend warrior, Cortex Superchips on 87 Octane Tune, K&N filtercharger, Airlift 1000, Prodigy Brake controller, 7 pin trailer hookup, Prostart Remote Starter, Cooper Discoverer ATw P265/70/16
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smj999smj
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Joined: 22 Jan 2012
Posts: 5579
Location: Prospect, VA

PostPosted: Fri Jan 24, 2014 10:00 am    Post subject: Reply with quote

My $92 rad from Parts Express on Ebay is still going strong @ 2 years....knock on wood! Last time I checked, they were going for $74 incl. shipping. Some prefer to go with Spectra Premium rads out of Canada, but some of their rads are made in China, just like mine.
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2006 Pathfinder LE VQ40DE AWD, aftermarket radiator, Airlift 1000's, Bilstein HD rear shocks, Doug Thorley shortie headers and mid-pipes, Magnaflow 12580 muffler, aFe Momentum GT CAI w/ dry filter, XTP plenum spacer, Superchips Flashpaq tuner
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iheartmypathy



Joined: 27 Apr 2013
Posts: 157
Location: Southern NH

PostPosted: Fri Jan 24, 2014 11:28 am    Post subject: Reply with quote

I replaced my radiator when they found a bit of tranny fluid in it... then months later it was discovered that even though we had replaced it I still needed a whole new tranny. thank goodness for that class action lawsuit; i was out of warranty and it cost just about $5K, i was able to get back a little over $2600.
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