Tranny cooler mod??

[kchummer]

I know many say it's the best thing to do out there for the H2...but what my question is, what causes the stock setup to fail??? Is it overheating, or does this just happen under normal driving conditions without explanation, like having a mind of it's own....I'm kicking this around, but I don't really tow anything, I don't really offroad, My ride is more of just a Sunday cruiser, literally, I work on the road during the week, so I'm just curious if this is necessary under MY driving conditions....I'm 100% open minded to doing it, just don't know if it's necessary or not....thanks for any responses....!!

[IRA51]

When the trans cooler in the rad fails (and it happens a lot )it will destroy your trans ,do it B4 it's too late . the trans runs cooler and will last longer with the external cooler . on road or off road it is a great mod .

[kchummer]

Thanks IRA, but does anyone know of a step by step process to do this mod....I just ordered mine today, part #4739 Tru-Cool MAX transmission cooler w/ external thermal bypass.....now I just need to know what the hell I'm doing puttin' it on....LOL!!

[IRA51]

do a search (external trans cooler mod )it is here with pic's

[kchummer]

sorry IRA, but external tranny cooler mod does NOT work....thanks

[MONSTERMATT]

Originally Posted by kchummer

sorry IRA, but external tranny cooler mod does NOT work....thanks

WTF??

[kchummer]

Let me rephrase that Monster, external tranny cooler mod SEARCH, does not work....sorry for the confusion....The actual modification, literally , does work obviously, I'm just looking for instructions....thanks

[IRA51]

READ THIS FROM START TO FINISH
http://www.elcovaforums.com/forums/s...trans+co oler

[kchummer]

It's starting to make more sense by looking at the pics and text.....If someone out there is willing to make a step by step with a little more detailed description w/ PICTURES W/ arrows pointing to exactly the correct hoses they're talking about, I'd pay $50 to have it....I just don't wanna connect/disconnect the wrong hose on this project....I'm used to working on quads, not vehicles, but I know I'm capable...LOL

[IRA51]

order the kooler and open the hood and trace the lines to the trans from the radiator and it will become crystal clear . very easy and worthwhile mod .

[porschett]

I guess I've just been lucky! Mine has 25K miles on her, used it to tow nymerous times, and I've never seen the temps even approach the high end. (Knock on wood)

[IRA51]

That's odd ,everytime one of my wife's has left I had to sell or give up vehicles.

[tomp]

Originally Posted by porschett

I guess I've just been lucky! Mine has 25K miles on her, used it to tow nymerous times, and I've never seen the temps even approach the high end. (Knock on wood)

It's not "if" it will fail but "when" it will fail. It is strongly recommended to do this mod ASAP. There have been people that bought the parts and had a failure before they could even get them installed. Having this failure will cost you thousands and might leave you stranded.

[MONSTERMATT]

Even if under warranty i would still do it, just to save the total aggravation of it, clearly a "NO BRAINER MOD" Just wondering if Yukons, Tahoes and suburbans have the same issues???

[HUMMERcustoms.com/TAZ]

This is a thought for temp measure. Take plastic cover over top of radiator so you can get a water hose down into radiator areas so you can wash them from front and rear till water runs clean. Believe me no matter how much you look with flashlights etc. it is filthy so wash them with a moderate spray power. This should help you till you get other upgrades made.

Also a 160 degree thermostat will help. Lingenfelter are the only ones selling last I heard.

TAZ

[IRA51]

and it makes the trans run cooler and that ain't bad.

[kchummer]

I would like to have thorough instructions....i don't wanna Screw anything up because I disconnected the wrong hose etc etc....I have the cooler in hand with the bypass kit.....just need to install now....

[KT2T]

Has anyone done this on a 2008+ with the six-speed tranny? Has the design changed at all such that this mod isn't necessary or would any of you 2008+ owners do it anyway?

[SummitUp]

Originally Posted by kchummer

I would like to have thorough instructions....i don't wanna Screw anything up because I disconnected the wrong hose etc etc....I have the cooler in hand with the bypass kit.....just need to install now....

There's more than one way to do this, but I can give you a couple tips to make this easier:

First of all, remove the passenger side plastic fender well, it's not that hard and it will give you easy access to the tranny cooler lines. You can't really access the cooler lines any other way (especially at the bottom of the radiator).

Second, if your installing the thermal bypass you need to identify which cooler line is coming from the tranny. The easiest way is to disconnect the two lines at the front of the truck and rubberband a plastic bag on the end of each line, and start the engine for a few seconds. The bag with the tranny fluid in it will be the line coming from the tranny. You don't want to make the mistake of hooking the return line to the inlet of the thermal bypass.

BTW there was a service manager of a Texas Hummer dealership who posted regularly on the Hummer X forums who stated he saw as many as 3 H2's per month come in with a ruptured internal radiator tranny cooler.

[iccon]

did they come stock on some models?