My tranny cooler hook up with pics - Page 3 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > Towing

Towing Towing with your TrailVoy

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  #21  
Old 05-13-2009, 05:11 PM
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rsnow46 rsnow46 is offline
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This is how I did mine too. But I didn't use 90 degree fittings, kept them straight. I felt they were too restrictive. I installed in the line from the trans a sender for my temp gauge. And I put a plastic cover over the cooler during the winter. I've done this on all my RV's, and trucks that tow.
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  #22  
Old 05-13-2009, 05:33 PM
fifields fifields is offline
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Looks awsome.....piece of advice is to put something between the lines that are touching the bottom of the radiator tank. Over time they will vibrate and rub causing premature failure. Had it happen to me a work. A simple and free fix is to use some larger / old raditor hose, cut it to length, slit it , slide it between the two and zip tie it in place. An old inner tube will work the same way.
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  #23  
Old 05-14-2009, 10:26 PM
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Quote:
Originally Posted by fifields View Post
Looks awsome.....piece of advice is to put something between the lines that are touching the bottom of the radiator tank. Over time they will vibrate and rub causing premature failure. Had it happen to me a work. A simple and free fix is to use some larger / old raditor hose, cut it to length, slit it , slide it between the two and zip tie it in place. An old inner tube will work the same way.

Thanks - I was wondering about that. Think I'll take your advice and run some hosing in between
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  #24  
Old 05-20-2009, 05:29 PM
Robmoo Robmoo is offline
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I just finish a PCMForLess install. It wasn't as easy as they billed. I ended up just about taking the front end apart to get the cooler installed. Perhaps it isn't necessary to remove the plastic front shroud and the bumper, but this made drop the radiator skid plate to access the transmission lines much easier. It took me about 4 hours. Not bad for never having idone a transmission cooler installation. I was very intimidated at first when my front end didn't look like the pictures and almost quit when I realized I'd have to try to get and the bolts for the skid plate to even see the tranny lines. The cooler is very sturdy and of good quality. I don't have to worry about a stray rock punching a hole in it. All in all I'd say it is worth the extra money.
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  #25  
Old 05-30-2009, 07:26 AM
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Here's a bit of info for people debating the whole "before" or "after" the original cooler. Take it for what it's worth.

Tru-Cool LPD Transmission cooler kits

# Medium Duty 3/4 thick coolers
# Tru-Cool self-regulating coolers - it is the oil that regulates the cooler.
# Thicker oil that is below the ideal operating temperature bypasses the cooler through the upper two plates. When the temperature rises, it becomes thin enough to pass through the entire cooler. TRU-COOL's superior heat transfer is efficient & automatic.
# For use with 5/16 & 3/8 transmission cooler lines only.
# Includes standard installation kit shown on bottom of this page.
# *Some late model cooler applications may require additional fittings when installing a cooler kit.

This came from the following link:

http://www.transmissioncoolers.us/Me...=tru-cool-thin
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  #26  
Old 05-30-2009, 09:16 AM
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Many thanks for the pics of your install. I have had a Tru-Cool sitting in the garage for a couple of months ready to install in the 06 Envoy. I am planning on doing exactly what you have done except for the straight connectors instead of 90 degree ones. I too have read and believe you go tranny-rad-cooler-tranny. I unfortunately do live in a cold climate -40C during the winter sometime. I choose the Tru-Cool (24000 lb capacity) for the auto temp sensing bypass. I have run tranny coolers on all my vehicles for 30 years with no winter protection except for a winter cover on a 76 GMC 3/4 ton van. That vehicle has 500,000 MILES on it and the original transmission (it is getting somewhat loose though). I also put an auxiliary spin on filter in line with the cooler so I could change the filter every year. My 95 Jimmy SLT got killed on road with over 260,000 km on it. Maintenance equals long life. I would put a cooler on any vehicle I own whether it tows or not, cheap insurance for cooler running vs tranny repairs.
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  #27  
Old 05-30-2009, 09:21 AM
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RedEnvoyDenali RedEnvoyDenali is offline
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One last thought

As usual just after I post I think of something else I wanted to ask. Did you mount the cooler with the metal straps or directly to the AC condenser with zip ties?
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  #28  
Old 05-30-2009, 02:12 PM
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I used the straps and mounted it to the main frame along where the hood latch is mounted. This left about a 1" - 1 1/2" gap between the aux cooler and the rad which I believe is the best way to install it. The consensus seems to be the staps will saw through your rad fins over time and cause damage.
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  #29  
Old 06-25-2009, 11:17 PM
2001 Envoy SLT 2001 Envoy SLT is offline
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Which way do you have the cooler mounted??? the fittings down, up or sideways. also is there an in or out of the cooler.

Thanks
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  #30  
Old 06-25-2009, 11:35 PM
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RedEnvoyDenali RedEnvoyDenali is offline
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I too am curious as to which way you mounted the cooler. Inlet and Outlet horizontal, vertical (up or down). If you mounted the cooler horizontal was the bypass channel on the top or the bottom.
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