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Old 08-26-2008, 03:28 PM   #29
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Exclamation I stand corrected!!!

Quote:
Originally Posted by wilkeytn View Post
As I stated earlier GM part $91.00 and installation of part at Chevrolet dealer 1 hour labor. They intially told me they didnt know how much install would be, I then asked them to look up in the accessory catalog what the install time was suppose to be and it said 1 hour.
I was rong, rong, rong

There is a GM tranny cooler accessory, the part # given in the previous post is valid, along with the part price.
I did some detective work today and every 1500 Burb and Silver has an oil to water cooler in the radiator. The lines that go from the tranny to the radiator are are used in the auxillary install. The out from the rad to the in on the aux, out on the aux to the in on the tranny. No one in parts or service could give me a solid quote on the labor though. There is a recommended labor on the accessory page, but the parts mgr, said the final time would depend on the punch time of the technican, the grill shell does have to be removed for the install. Otherwise it's a pretty straightforward procedure, this would probably be the best most cost effective way to get an air to oil cooler added to your Burb.
We have never stocked this accessory so check with your dealer, they may have to special order it.

Stream Safe. Bob
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Old 08-26-2008, 04:15 PM   #30
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bob

i figured every one had a cooler, i just didn't want to chime in as you seemed to have a source to look it up.

after all it has been 8 years since i laid hands on a new truck.

i would consider a new one but mine is working to well to get rid of it!

john
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Old 09-01-2008, 11:09 AM   #31
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I got back yesterday from my short trip with the A/S in tow. The transmission temp gauge in the 2008 Suburban indicated that the temp ranged from 190 degrees to a high of 207 degrees. The higher temps were at slow speeds in stop and go traffic. On the highway the temp leveled out at about 195 to 197 degrees.

When the trailer is not in tow the transmission temp is between 175 to 185 degrees.

Don
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Old 09-01-2008, 11:35 AM   #32
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Towing local road, stop and go, highway all in 95+ambient outdoor temps, I have yet to cross the 200 degree threshold. Most I have seen was 198 degrees. Were these temps with a trans cooler?
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Old 09-01-2008, 12:34 PM   #33
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Quote:
Originally Posted by Silvertwinkie View Post
Were these temps with a trans cooler?
No aux trans cooler, yet

Don
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Old 09-01-2008, 12:57 PM   #34
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just for comparason, returned from iowa yesterday.

88 degrees outside, 70 mph, mostly in OD, harley in the bed, 29 excella in tow.

average 160 with one period up to 175 going up the hill east of the missisippi river.

in town about 180 after 200 miles highway.

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Old 09-01-2008, 10:17 PM   #35
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Thumbs up yea...we all normal!!!

Just got back from our Adirondack Labor Day.... 160 to 180

Don

Glad everything is is on track.

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Old 09-01-2008, 10:30 PM   #36
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I read this thread again tonight and decided I would crack open the Burb and take a peek at the cooler. The cooler measures 11" wide, abut 1/2" deep and 4" tall. I have to believe that GM put a cooler in that would be enough for the combined GVWR, but I have to say this thing looks REALLY PUNY.

I've hit a max of 198 degrees with mine with the ambient temps being well into the 90s, but would be a lot happier if it was at 180 degrees. I may buy a deep trans pan and have been looking at the B&M super cooler to replace the tiny trans cooler GM installed. The issue for me is that the B&Ms are 1/2" NPT connections and GM uses I believe -6AN connectors, making a swap not very easy....
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Old 09-02-2008, 10:40 PM   #37
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pump flow rate has something to do with that also along with pan size. That alluminum finned pan is nice.
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Old 09-02-2008, 10:41 PM   #38
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anybody use that tranny cooler with its own fan? comes as a unit
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Old 09-02-2008, 11:02 PM   #39
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Not yet, but I think I may add the mag-hytec pan (adds 4 quarts) and see what that does before I engineer an install for the B&M. The space is somewhat limited if I want to use the factory lines. The hood latch assembly also makes putting a much bigger one in the same place problematic. So I'll do the pan first and then if I haven't gotten down enough, will add the bigger cooler somehow. I am just totally floored that a 1/2" deep by 4" tall cooler with about 2 inches of exposed airflow from the grille is all they put in.....
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Old 09-02-2008, 11:25 PM   #40
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twink

sounds like a lot of work for a goal of 18 degrees.

will you be happy with it in the winter? they do need to be somewhat warm to operate properly.

i did notice today mine was almost to the same temps without towing.

after talking with my neighbor who rebuilds transmissions going the full synth route is probably your best bet.

yours should be running cooler anyway, remember we removed the plugs from the bumper at norby's.

john
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