Automatic transmission radiator oil cooler bypass - Nissan Frontier Forum
 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 659 (permalink) Old 03-07-2009, 02:19 PM Thread Starter
Super Moderator
Shift_Obsessed
Lifetime Member
 
Zero Six LE's Avatar
 
Join Date: Aug 2006
Location: Miltown,Florida
Posts: 18,975
Thanks: 11,944
Thanked 2,980 Times in 2,034 Posts
Mentioned: 0 Post(s)
Quoted: 789 Post(s)
Garage
Feedback Score: 0 reviews
Automatic transmission radiator oil cooler bypass

I decided to take the radiator oil cooler out of the circuit and just use the big oil cooler that's used for the towing package. At least one CF member had coolant contaminate his transmission fluid. I don't want to take that chance so I modified mine.

Parts that I used.


I was going to use these clamps with the vacuum caps but decided to use the factory ones for now.


Remove the front air spoiler and skid plate. You will need to clamp the inlet hose to prevent the transmission fluid from draining out. That's the long hose leading to the trans oil cooler on the driver's side.




Route the long hose to the right to connect it to the short hose. I used a PVC pipe cutter and cut both hoses at the same time once I decided where to cut. Take your time and make sure you don't kink the hoses before cutting them. If you cut them too short, you will have to buy new hoses and start over.
Insert the tube joint and clamp the hoses onto the joint.


Vacuum caps covering trans oil cooler hose barbs.


I use two 5/16" vacuum caps to cover the hose barbs on the trans oil cooler. I used the old factory clamps since it doesn't have to be really tight. It's just to keep it clean. You could opt for standard hose clamps or some like shown in the 2nd photo above. Pour any drained fluid back into the transmission if you drained it into a clean container. Start the engine and check for leaks.




Last edited by Zero Six LE; 03-07-2009 at 07:00 PM. Reason: Added photo
Zero Six LE is offline  
The Following 10 Users Say Thank You to Zero Six LE For This Useful Post:
B Love (09-29-2011), Bmann (04-23-2011), explorerman (09-25-2010), Ironman (07-06-2010), LilBillyBarker (02-22-2015), Lop06 (12-13-2014), rberry5886 (01-21-2012), SDMF_Reaps (09-01-2009), XPBQN (01-24-2013), x_mods (10-29-2012)
Sponsored Links
Advertisement
 
post #2 of 659 (permalink) Old 03-07-2009, 02:40 PM
Shift_Obsessed
 
Inyourface1650's Avatar
 
Join Date: Feb 2006
Location: Denver, CO
Posts: 8,744
Thanks: 26
Thanked 256 Times in 167 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Send a message via AIM to Inyourface1650
Nice write up. Its really not very hard is it?

The only downside to this, and why when I put my tranmission cooler in- i put it in line with my radiator cooler on my pathfinder, is the radiator does not warm the tranny fluid. So you might get some harder shifts in the morning in the winter..

2007 Super Black 4x4 Xterra. 2.0 Radflo's, PRG Uppers, Sliders, Shackles, Add-a-leaf, Bilstein 5100's, Rear Tire Carrier, 285/75R16 Open Country's.
Inyourface1650 is offline  
post #3 of 659 (permalink) Old 03-07-2009, 02:44 PM Thread Starter
Super Moderator
Shift_Obsessed
Lifetime Member
 
Zero Six LE's Avatar
 
Join Date: Aug 2006
Location: Miltown,Florida
Posts: 18,975
Thanks: 11,944
Thanked 2,980 Times in 2,034 Posts
Mentioned: 0 Post(s)
Quoted: 789 Post(s)
Garage
Feedback Score: 0 reviews
Quote:
Originally Posted by Inyourface1650 View Post
Nice write up. Its really not very hard is it?

The only downside to this, and why when I put my tranmission cooler in- i put it in line with my radiator cooler on my pathfinder, is the radiator does not warm the tranny fluid. So you might get some harder shifts in the morning in the winter..
Thanks. It's not hard at all. Florida winters are not that brutal. I'll see how it goes.



Zero Six LE is offline  
post #4 of 659 (permalink) Old 03-07-2009, 02:45 PM
Shift_Obsessed
 
Inyourface1650's Avatar
 
Join Date: Feb 2006
Location: Denver, CO
Posts: 8,744
Thanks: 26
Thanked 256 Times in 167 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Send a message via AIM to Inyourface1650
I really like the caps, most people just leave that stuff open.

2007 Super Black 4x4 Xterra. 2.0 Radflo's, PRG Uppers, Sliders, Shackles, Add-a-leaf, Bilstein 5100's, Rear Tire Carrier, 285/75R16 Open Country's.
Inyourface1650 is offline  
post #5 of 659 (permalink) Old 03-07-2009, 06:50 PM
Shift_Obsessed
 
Mylt1's Avatar
 
Join Date: Jun 2006
Posts: 5,940
Thanks: 0
Thanked 262 Times in 209 Posts
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Feedback Score: 0 reviews
who on here had coolant in there trans fluid? i must have missed that.

05 LE CC 4X4. SUPER BLACK
Mylt1 is offline  
The Following 2 Users Say Thank You to Mylt1 For This Useful Post:
Bturner906 (07-21-2014), MsMoJo (11-07-2011)
post #6 of 659 (permalink) Old 03-07-2009, 06:50 PM
Shift_Obsessed
 
Join Date: May 2006
Location: ME
Posts: 2,215
Thanks: 118
Thanked 121 Times in 105 Posts
Mentioned: 0 Post(s)
Quoted: 11 Post(s)
Feedback Score: 0 reviews
Living in Florida, did you really want to do this? I have the Nismo, no tow package and I have the dual coolers, like you do. I thought all V-6s came like that.
2WD_NISMO is offline  
post #7 of 659 (permalink) Old 03-07-2009, 06:52 PM Thread Starter
Super Moderator
Shift_Obsessed
Lifetime Member
 
Zero Six LE's Avatar
 
Join Date: Aug 2006
Location: Miltown,Florida
Posts: 18,975
Thanks: 11,944
Thanked 2,980 Times in 2,034 Posts
Mentioned: 0 Post(s)
Quoted: 789 Post(s)
Garage
Feedback Score: 0 reviews
Quote:
Originally Posted by Mylt1 View Post
who on here had coolant in there trans fluid? i must have missed that.
Transmission / Radiator Failure

Quote:
Originally Posted by 2WD_NISMO View Post
Living in Florida, did you really want to do this? I have the Nismo, no tow package and I have the dual coolers, like you do. I thought all V-6s came like that.
What harm can it do? The big oil cooler is on all of the autos from the factory as you stated. One of the big selling points for the 05-up Frontier is the towing capacity. I'm sure that's why they added the additional cooler.




Last edited by Zero Six LE; 03-07-2009 at 06:54 PM. Reason: Automerged Doublepost
Zero Six LE is offline  
post #8 of 659 (permalink) Old 03-07-2009, 07:08 PM
Shift_lurker
 
Not2swift's Avatar
 
Join Date: Jul 2006
Posts: 14
Thanks: 1
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I spoke to the master service tech (30+ years experience) at my dealership about this issue regarding my '06 LE KC. He recommended I close this bypass and add a trans cooler after my 3yr/36000 mi warranty expired. So, this must be an issue with these trucks.
Not2swift is offline  
The Following User Says Thank You to Not2swift For This Useful Post:
Bturner906 (07-21-2014)
post #9 of 659 (permalink) Old 03-07-2009, 07:12 PM Thread Starter
Super Moderator
Shift_Obsessed
Lifetime Member
 
Zero Six LE's Avatar
 
Join Date: Aug 2006
Location: Miltown,Florida
Posts: 18,975
Thanks: 11,944
Thanked 2,980 Times in 2,034 Posts
Mentioned: 0 Post(s)
Quoted: 789 Post(s)
Garage
Feedback Score: 0 reviews
Quote:
Originally Posted by Not2swift View Post
I spoke to the master service tech (30+ years experience) at my dealership about this issue regarding my '06 LE KC. He recommended I close this bypass and add a trans cooler after my 3yr/36000 mi warranty expired. So, this must be an issue with these trucks.
Add another one in addition to the factory cooler?



Zero Six LE is offline  
post #10 of 659 (permalink) Old 03-07-2009, 07:21 PM
Shift_lurker
 
Not2swift's Avatar
 
Join Date: Jul 2006
Posts: 14
Thanks: 1
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Is the cooler in front of the radiator a trans cooler? I'm not that educated in this area.
Not2swift is offline  
Reply

  Nissan Frontier Forum > Mods and Technical Discussions > DIY - Do It Yourself / Tech Tips

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Nissan Frontier Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 7 (0 members and 7 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On