Adding a Tranny Oil Cooler to my 03 Astro AWD

Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby 95gmc [OP] » June 1st 2011, 11:09pm

Hey Folks:

Trying to find an aftermarket kit that is relativley easy to install. Any help is apprciated. I tow a boat and last week saw the temp gauge go over 210 which I dont like..

Thanks everyone..
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Re: Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby Phantom » June 1st 2011, 11:24pm

Hayden model 679 or

Imperial model 243012 will do you good , very good product will keep the trans cool when towing
10,000 lb trailer , cost about 55 bucks , they all install about the same , take the transmission line from the top of radiator and run a line to the input of the cooler and run a line from the output of the cooler back to the line that goes to the return to the transmission , use part number Hayden fitting kit 390 , or Imperial Fitting kit part number 240390 @ $10 , mount cooler where it gets a lot of air flow over it (behind grille) , or mount a 10 in fan to it and mount anywhere
It's what I use .
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Re: Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby throrope » June 2nd 2011, 11:39pm

2x on Phantom

I had A time getting the right fitting at the radiator on our '94. If memory serves correctly, it's a reverse flare. My OEM had a spring loaded fitting and needed a GM special tool number to back it off the tubing. I ended up cutting the tube, flaring and using a short length of rubber hydraulic hose.

Good luck and keep us posted.
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Re: Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby silver mist AWD » July 4th 2011, 5:45am

Look into the trucool models, too. I just put one in, it seems to do what it is supposed to. There are several people who have posted pictures of their install if you look for them.
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Re: Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby RECox286 » July 4th 2011, 2:36pm

When adding an aftermarket tranny cooler, any one is better than any none. In fact adding a cooler is probably one of the best things you can do for your tranny.

I have gotten condensers from old house window a/c's, cleaned them out, and used them for the purpose. They seem to work just as well, and they are built

somewhat stronger. Sometimes you just gotta use what you have in the junkpile.


Bob
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Set a man on fire and he will be warm the rest of his life.

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Re: Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby silver mist AWD » July 12th 2011, 10:50am

throrope wrote:2x on Phantom

I had A time getting the right fitting at the radiator on our '94. If memory serves correctly, it's a reverse flare. My OEM had a spring loaded fitting and needed a GM special tool number to back it off the tubing. I ended up cutting the tube, flaring and using a short length of rubber hydraulic hose.

Good luck and keep us posted.



The trucool has two size fittings, one I think is a compression fitting to barbs and the other fits on the radiator. Practically turnkey deal with the 2000 astro model. Some say an hour install, mine wasn't quite that quick, but I was doing other things, too.
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Re: Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby silver mist AWD » July 12th 2011, 1:13pm

Here's an 11 page thread on the subject at the other URL. Photos of mine on page 11, other installations and different brands with photos, too.

http://chevygmcvans.com/viewtopic.php?f=57&t=514
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Re: Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby speedy57 » July 12th 2011, 11:30pm

Link isn't working :think:
If it's Older than Dirt I can work on it :)
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Re: Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby rwbrooks50 » July 13th 2011, 4:28am

Silvermist,Did you use these fittings to eleminate the snap-in factory fittings? Do you have a picture?

Both my trans & oil lines leak at the radiator. Can I use the fittings, cut the steel lines and add rubber hoses?

Rick
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Re: Adding a Tranny Oil Cooler to my 03 Astro AWD

Postby silver mist AWD » July 15th 2011, 9:56am

rwbrooks50 wrote:Silvermist,Did you use these fittings to eleminate the snap-in factory fittings? Do you have a picture?

Both my trans & oil lines leak at the radiator. Can I use the fittings, cut the steel lines and add rubber hoses?

Rick


I'm not sure of all models, mine is a 2000.

I used the compression fittings that are with the van. One side fits the compression fitting and the other screws in to the top of the radiator, both have barbed couplings that the hoses provided fit over and clamp on to. I did not have to cut any of the OEM equipment, and I can remove it all without a trace except for three small holes that were drilled to mount the brackets.

I used plumber's thread tape on all the threads, no leaks so far.

Astrosafarivan.org now http://chevygmcvans.com/ is the earlier version of this forum,I think, you might have to type in the address and navigate to forums then to transmission and find the cooler thread. It is still there. It just doesn't link by cut and paste for some reason.

I don't have any close up of the radiator side of things. I do have some of the front, taken with low res toy camera, they are not on this laptop but I will try to link them.

http://chevygmcvans.com/index.php

I used a few zip ties to hold the hoses away from sharp edges and also on top mounting points. Other than zip ties the only thing I used was a stick of aluminum I found around the shop, it worked better, more sturdy and I bent it to give extra clearance and ventilation as well as put the cooler more perpendicular to the air flow. Also the bend allows room for a fan if that comes in the future. The kit has some modified zip ties that are made to poke through the radiator and mount it flat against the AC cooling fins. I didn't especially like that Idea. The thread shows some mounted with in and out tubes both on one side- mine I put them on the top so fluid would stay in the unit and wouldn't run into the pan (Like BMW factory oil coolers). I think there is little difference mounted horizontally or vertical, :shrug: my kit just seemed to fit better with the fins horizontal.

Pretty easy compared to pulling and rebuilding. the cooler is a good insurance policy as they call it. Don't forget to schroll the photos, they don't really show much detail as it is.
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trans cooler009.jpg
Stick of Aluminum , about 1" by 1/4".
trans cooler009.jpg (63.96 KiB) Viewed 1627 times
trans cooler005.jpg
Only drilled one hole to brace top or I might have used a pre-existing hole.
trans cooler005.jpg (52.06 KiB) Viewed 1627 times
trans cooler008.jpg
I used the four screws with the kit along the bottom, the cooler behind the aluminum and scew points forward which held the whole thing pretty secure. On the top I used zip ties through the holes in the straps provided to hold the unit and hold hoses away from sharp edges.
trans cooler008.jpg (77.2 KiB) Viewed 1627 times
trans cooler006.jpg
The strap to the center stantion was kind of redundant, but whatever...more bracing. Might want to put a fan in there at some point. People do post pics of that on the astrosafari.org site.
trans cooler006.jpg (63.22 KiB) Viewed 1627 times
trans cooler007.jpg
I left the aluminum longer than needed for future oil cooler or whatever else might go there.
trans cooler007.jpg (70.02 KiB) Viewed 1627 times
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