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Username Post: ATF cooler install        (Topic#361142)
Stinky 
Senior Member
Posts: 1697

Loc: Whitewater, CO
Reg: 05-25-01
05-27-20 06:36 AM - Post#2794966    

I am working on a Nissan mini-van...yeah I know, but youse guys are smarter than on any other forum. I want to put a trans cooler on it. There is about 1/2" between the AC condensor and the back of the grill (no room). But, between the radiator and the fan shroud there is about 3".

So, I know that the cooler is supposed to go in front of the radiator, but will it work worth a hoot behind the radiator?



Edited by grumpyvette on 05-27-20 07:04 AM. Reason for edit: No reason given.

 




grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17512
grumpyvette
Age: 72
Loc: FLORIDA USA
Reg: 03-16-01
05-27-20 06:53 AM - Post#2794968    
    In response to Stinky

yes it will still work behind the radiator but its efficiency will be significantly reduced, trans fluid should be cooled to under 160f and the heat exiting the radiator may not allow it to cool to that level unless the cars moving at least 30 mph in that location, be aware that there are fluid coolers that inclued powered fans that can be mounted in various locations other than behind the radiator



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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 05-27-20 07:02 AM. Reason for edit: No reason given.

 
Shepherd 
Frequent Contributor
Posts: 2091

Loc: Lake George, NY
Reg: 11-11-15
05-27-20 08:20 AM - Post#2794974    
    In response to Stinky

No, little or no affect. As usual, Grumpy's on target.



Edited by Shepherd on 05-27-20 08:23 AM. Reason for edit: No reason given.

 
Stinky 
Senior Member
Posts: 1697

Loc: Whitewater, CO
Reg: 05-25-01
05-27-20 10:29 AM - Post#2794985    
    In response to Shepherd

I plumbed it...

Out of the trans to the filter (external filter, w/a K&N 2006 mounted to it, the mount takes Chevy threads/filters)

To the external cooler

To the radiator's ATF cooler

The bottom radiator ATF hose was not changed.



 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25179
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
05-27-20 03:40 PM - Post#2795008    
    In response to Stinky

Did you upgrade the cooler kit lines? I'm following grumpyvette's advice. The hose is 3/8". The inside diameter is way too small for flow. I'm installing a Class IV cooler. Instead instead of using the cooler kit hose, I'm upgrading to the next size. The bigger hose will have better flow.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Stinky 
Senior Member
Posts: 1697

Loc: Whitewater, CO
Reg: 05-25-01
06-08-20 09:28 PM - Post#2795940    
    In response to gchemist

The stock lines were 5/16". All the stuff that I put in was 3/8"

So far, it hasn't been real warm. I drove it for about an hour, w/the AC on and according to my IR thermo....I got it up to about 155deg.



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17512
grumpyvette
Age: 72
Loc: FLORIDA USA
Reg: 03-16-01
06-09-20 03:17 AM - Post#2795945    
    In response to Stinky

155f trans fluid temp, is great so far.

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


 
65_Impala 
Very Senior Member
Posts: 4494

Reg: 12-29-02
06-09-20 07:06 AM - Post#2795974    
    In response to Stinky

Your temps are good so far, but you installed it opposite of most recommendations which are to put the cooler after the radiator cooler or replace the radiator cooler all together.

I've driven GM's with temperature sensors. One rental truck ran no hotter than 50*C on a 8 hour trip I took. So, if GM thinks ATF can run at that temp for long durations, I don't see why running it cool would be a problem.



 
Ray P W 
Contributor
Posts: 514

Reg: 09-30-15
06-09-20 08:03 AM - Post#2795975    
    In response to 65_Impala

"yes it will still work behind the radiator but its efficiency will be significantly reduced, trans fluid should be cooled to under 160f"

Grumpy,

Here's something interesting on fluid temperatures. A couple of years ago my wife and I bought a new 2017 Chevy Tahoe with a "towing package" from a local Chevy dealer. Its trans temp gauge showed temps consistently over 200* F and as hot as 240*F towing our small. light travel trailer that is way under the rated towing capacity of this Tahoe.

I contacted Chevrolet and GM up to the level of the GM Chairman, Mary Barra and got only stonewalling. Then I made a complaint with the California Bureau of Automotive Repair because GM refused to state what a safe operating temperature is.

After doing that and the BAR supporting my position that the trans was drastically overheating the Chevy dealer contacted us to have us bring in the Tahoe for a thermostatic valve replacement. That part change reduced the trans temperature slightly but it still runs at ambient temperature plus 100*F (eg 190*F on a 90* day) and gets as hot as 240*F coming up the grade to our house.

This does not give my wife and me a good feeling about transmission longevity on this Tahoe that now has about 34,000 miles.

GM has a defective product here and will not acknowledge that fact because they don't want to do a recall.

Ray W



 




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