Jayco RV Owners Forum
 


Reply
 
Thread Tools Display Modes
 
Old 07-01-2014, 08:52 PM   #11
Junior Member
 
Join Date: Jun 2014
Location: Southern NY
Posts: 14
It is all Nissan trucks 05-10 4.0L and 5.6L. There are two radiator part numbers that are the bad ones. I thought I was absolved since I had the 2008 5.6L, rare in a Pathfinder. No such luck.

It is not the hose that's the problem. The bottom 10% of the radiator is an ATF fluid warmer/cooler. The wall in the radiator between the antifreeze and ATF was a single wall and perforates effectively mixing the two fluids. Destroys your tranny, water pump, trans ecm, and head needs to be flushed.

Bypassing the trans fluid section of the radiator is the internet fix which I'm rather scared of. Yeah it warms your ATF but also cools it once your up to operating temp. Heat kills transmissions. I installed a Spectra aftermarket radiator for $160 which had a double wall with a true separation. No more worries about the milkshake of death.
__________________

mikeG is offline   Reply With Quote
Old 07-01-2014, 09:20 PM   #12
Junior Member
 
Join Date: Jun 2014
Location: Southern NY
Posts: 14
Bad OEM Nissan radiators :

21460-EA265 and 21460-EA215

Good new OEM radiator :

21460-9CAOE
__________________

mikeG is offline   Reply With Quote
Old 07-01-2014, 09:27 PM   #13
Senior Member
 
Join Date: Sep 2013
Location: South Texas
Posts: 4,190
Quote:
Originally Posted by mikeG View Post
It is all Nissan trucks 05-10 4.0L and 5.6L. There are two radiator part numbers that are the bad ones. I thought I was absolved since I had the 2008 5.6L, rare in a Pathfinder. No such luck.

It is not the hose that's the problem. The bottom 10% of the radiator is an ATF fluid warmer/cooler. The wall in the radiator between the antifreeze and ATF was a single wall and perforates effectively mixing the two fluids. Destroys your tranny, water pump, trans ecm, and head needs to be flushed.

Bypassing the trans fluid section of the radiator is the internet fix which I'm rather scared of. Yeah it warms your ATF but also cools it once your up to operating temp. Heat kills transmissions. I installed a Spectra aftermarket radiator for $160 which had a double wall with a true separation. No more worries about the milkshake of death.

I guess I must be missing something. How can a liquid that is around 210* (coolant in the rad at operating temperature) cool a liquid that should be around 160 or 170 (transmission fluid at operating temperature)? I don't see that part of the transmission fluid loop offering any help to cool down the fluid. Perhaps the radiator itself is cooling the fluid? Are there fins down therein the transmission fluid reservoir portion? Besides, that's what the transmission fluid coolers further up on the rad are for.

I had no idea the problem was so widespread, but the "internet solution" has worked for me and scores of others. IIRC, someone somewhere, (yeah I know...) said that dealers were using this bypass during the early days of the problem.
__________________


2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)

Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!
Camper_bob is offline   Reply With Quote
Old 07-01-2014, 09:38 PM   #14
Junior Member
 
Join Date: Jun 2014
Location: Southern NY
Posts: 14
The ATF is cooled just like your coolant by the radiator. The warming effect is great on cool winter mornings like here on the northeast when the truck will shift really hard until the ATF temp goes up. In Texas you don't have to worry about that .

There was a huge class action lawsuit last year about it and Nissan extended the warranty to 100k for damage the radiators cause. I didn't want my truck to go through the problem so took action. When I asked my dealer about the bypass he said absolutely not, replacement is the only recommendation.

The second cooler in front is a supplemental ATF cooler which comes with the tow package. If you tow and don't have one that is essential. I always added a B&M cooler to any TV I had without a sup trans oil cooler. Yes it helps cool the fluid but is to be used in conjunction with the radiator.
mikeG is offline   Reply With Quote
Old 07-01-2014, 09:43 PM   #15
Junior Member
 
Join Date: Jun 2014
Location: Southern NY
Posts: 14
My apologies to the OP for hijacking the thread.

Supplemental trans oil cooler is one thing that every TV should have.

I also do more frequent synthetic oil changes when towing and fill with premium fuel before a trip. Might be overkill.
__________________

mikeG is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Virginia State Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 12:51 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.