Trans cooler bursts!

[AK47]

Hi Guys just so i know i am ordering the right one its this one yes ?

Tru-Cool MAX transmission cooler *WITHOUT external thermal bypass

Code: 4739-1








Tru-Cool # LPD47391 40,000 GVW rating, 45,000 BTU rating
8 1/2 x 22 3/4 x 1 1/4 inch
3/8 inverter flare (fittings are included for thread to hose barbs)
WITHOUT external thermal bypass. Lower cost for locations where there are mild winters!
the thing is i have bad winters and hot summers as well will this matter

[ROADCAPT]

AK47 Yes that is the right part Number however you will need the trans bypass system in you area. It allows cold fluid to bypass the cooler till it warms up. Need the bypass at below 32F. I have a write up on the install over on the H2 forum.

Be Safe

[pdsq99f4]

I would have them replace the water pump gaskets while they are in there. Have seen them fail shortly after due to the atf eating them away.

[HUM GOOD]

Originally Posted by pdsq99f4

I would have them replace the water pump gaskets while they are in there. Have seen them fail shortly after due to the atf eating them away.

Thanks for the info.....I spoke with them. They said they would not do it unless I paid for it.....So I had them note my concern on the invoice, the GM said if it breaks through it will be noted and covered.


I picked up the truck today. Total invoice was $8300. Hummer picked up $5200. The balance was $3100. The dealer discounted me down to $2100.

[HUM GOOD]

Originally Posted by PhilD

That is amazingly good for a vehicle out of warranty, GM/Hummer did well!

Yes, i am not one for letters.....but I will be writing one to hummer and one to the dealer for their excellent service. They even returned ALL my calls with in one hour......AMAZING!

[HUM GOOD]

I finally got time to post -

I looped the tranny section of the radiator with a hose, closing it and elimanating the possible of the pepto bismal effect ever happening again.

With the information provided by Phil D (Thanks you the man) I purchased the larger of the 2 cooler Tru cooler #4739-1. I easily mounted it slightly off center towards the passenger side of the rig leaving the power steeering cooler in it's place.

The tranny now runs consistently at 150 degrees and the chance of the trans fluid mixing with the antifreeze is eliminated.

Thanks guys for all the awesome info.


brand new silver tru cooler 4739-1




Black hose is link to close off radiator section
Orange hose is feed to the new cooler

[HUMMERcustoms.com/TAZ]

I have been giving this some thought and like your idea. It appears though I may have to think of something different as it appears there is no room in front for supercharger cooler. It is hard to tell but, I think I would not be able to do this unless i moved SC cooler and added a fan to it so it does not have to have forced air from dual electric fans.

HUM GOOD have You seen the Magnuson SC cooler? Can You tell what would need to be done with this MOD to work with SC?
Thanks

As usual Phil is the man with the plan. Thanks Phil!!

TAZ