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2004 buick rainier
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55 Posts
Discussion Starter #1
This is what I did. I was looking on here for info on installing one, got the info so I felt comfy and hopefully this will help someone else out who's trying to figure it out
 

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2009 saab 9_7x
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89 Posts
Nice job with the compression fittings and running in series with the radiator. I have an 04 TB that I have been towing a 4,500 pound trailer with and plan to install a cooler this spring. Granted I do not tow a lot, nor in hills. This leads me to a few questions:

Have you changed the fluid since you've owned it?
How big is the cooler you installed?
Did you install a trans temp gauge?

Thanks again for the pictures the way you plumbed it is is very professional. I was just going to cut the line and clam the hoses but this is way better.
 

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2004 buick rainier
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55 Posts
Discussion Starter #4
Have you changed the fluid since you've owned it?
How big is the cooler you installed?
Did you install a trans temp gauge?
Thanks for the kind words:)

To answer your questions:

1) I just got the Rainier last year but changed the tranny fluid at 80,000 Km just because I knew I'd be towing with it.

2) The size is 7 1/4 X 11 X 3/4. It's a stacked plate type of tranny cooler and it's rated for 18,000 lbs combined weight.

3) No I didn't install the tranny temp gauge just because to be honest, as long as I know the tranny cooler is working( and I checked and double checked it) I don't really care what the temp is as long as it's not over heating
 

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2004 buick rainier
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55 Posts
Discussion Starter #5
were'd you buy it, it mighht be a future mod for me

It's a place called Parts Source here in Ontario. It was $89.99 and it is made by/distributed by Mister Transmission as a kit with tubing, brackets, etc. and is described on box as:

Professional - Grade Automatic Transmission Cooler

The compression fitting I purchased seperately cause I figured they'd work out better for me.
 

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2008 trailblazer_lt
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20 Posts
Which direction does the fluid go.

i.e. is it:

tranny>rad> cooler>back to tranny
or
Tranny>cooler>rad>back to tranny

Steve L.
 

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2004 buick rainier
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55 Posts
Discussion Starter #8
from the pics it looks like he's got it going
trans > rad > cooler > trans
That is the way you want it to go.
This is correct.

Fluid leaves bottom of rad (OEM tranny cooler), goes up and thru my auxilary tranny cooler, comes down then back to the tranny
 

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2008 trailblazer_lt
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20 Posts
Ya but, he lives in London Ontario, which can get very cold in the winter.


Check the "trans cooler needed" thread (about 1 wk ago)where you want to keep a mininum temperature of the tranny fluid when it is cold outside (180*F to190*F, posts 8 and 9). So that post recommended to go Tranny>cooler>rad(so the fuild warms up)>back to tranny. This is for colder climates.

Steve L.
 

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2009 saab 9_7x
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89 Posts
Another benefit of routing to the external cooler first is it will relieve some of the burden on the radiator and thus the engine will run cooler as well.
 

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2006 chevy trailblazer_ls
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705 Posts
I guess if running too cold in the winter becomes a serious issue, you could go all big rig and cover the front grille or cover the front of the cooler when its cold.
 

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2004 buick rainier
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55 Posts
Discussion Starter #12
Instructions said that it is to be installed tranny>Rad>cooler>tranny so I did.

I think that the previous post mentioned regarding colder weather also mentioned something about an internal thermal device that would not run the fluid unless tranny was up to temp to begin with.

Also mentioned was that a stacked plate type of cooler would bypass the plates and run back down in cold weather.

Yes I live in London, yes it's in Canada and it gets cold but not as cold as some of you think. London is actually south of Minnesota and is surrounded by the Great Lakes.
 

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2004 buick rainier
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Discussion Starter #13
I guess if running too cold in the winter becomes a serious issue, you could go all big rig and cover the front grille or cover the front of the cooler when its cold.

I could also run a bypass across the two lines if I really wanted to but I seriously doubt that'll be necessary
 

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2005 buick rainier
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I installed one last fall, but I am pretty sure I had the the sequence Trans>Aux>Rad>Trans.

I had the assumption that cooler trans oil would result in cooler Antifreeze due to cooler oil flowing through the Radiator. Correct me if I wrong, I will crawl under the Rainier to see if this is in fact the way I ran it.
 

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2006 chevy trailblazer_ls
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705 Posts
Yes I live in London, yes it's in Canada and it gets cold but not as cold as some of you think. London is actually south of Minnesota and is surrounded by the Great Lakes.
I go relatively close to you everytime i drive home to visit my parents. i live in Michigan, basically straight west of you, and my parents live in NY south of Buffalo, so I cut across Ontario.
 

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Western Canada Chapter
2003
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6,411 Posts
I installed one last fall, but I am pretty sure I had the the sequence Trans>Aux>Rad>Trans.
:thumbsup: That is the correct way to route the fluid. There are optimal operating temperatures that are best for the tranny. The radiator last routing helps minimize the amount of time your tranny is actually too cold.
 

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2008 trailblazer_lt
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20 Posts
The pictures of this set up requires the tubing to be cut.

I thought there are kits that have fittings that fit right into the rad and onto the tubing so nothing has to be cut and can be easily put back to original.

Also, I thought that these kits had stainless braided hoses rather than bare rubber.

Steve L.
 

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2006 chevy trailblazer_ls
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705 Posts
The pictures of this set up requires the tubing to be cut.

I thought there are kits that have fittings that fit right into the rad and onto the tubing so nothing has to be cut and can be easily put back to original.

Also, I thought that these kits had stainless braided hoses rather than bare rubber.

Steve L.
The kit pcm4less sells has nice stainless hoses and all and custom brackets to fit in and all, but its also alot more expensive, most of the guys on here purchase the aux cooler itslef and have to do a little extra work to hook up, but alot cheaper
 

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2008 trailblazer_lt
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ya, no kidding. $80(plus about $20 for home depot fittings) versus $280. But the quality is sooo much better and you can remove it in case GM says your warranty is void because of an unauthorized modification.

Steve L.
 
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