Tranny cooler mod??
 

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....!!

Re: Tranny cooler mod??
 

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 .:D

Re: Tranny cooler mod??
 

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!!

Re: Tranny cooler mod??
 

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

Re: Tranny cooler mod??
 

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

Re: Tranny cooler mod??
 

WTF??

Re: Tranny cooler mod??
 

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

Re: Tranny cooler mod??
 

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

Re: Tranny cooler mod??
 

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 :jump:

Re: Tranny cooler mod??
 

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 .

Re: Tranny cooler mod??
 

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)

Re: Tranny cooler mod??
 

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

Re: Tranny cooler mod??
 

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.

Re: Tranny cooler mod??
 

:iagree: 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???

Re: Tranny cooler mod??
 

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

Re: Tranny cooler mod??
 

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

Re: Tranny cooler mod??
 

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....:mad:

Re: Tranny cooler mod??
 

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?

Re: Tranny cooler mod??
 

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.

Re: Tranny cooler mod??
 

did they come stock on some models?

Re: Tranny cooler mod??
 

Does anyone have pictures for the external cooler installation?

Re: Tranny cooler mod??
 

Do you want pictures of the actual process? Or just one that's already installed? I just had a cooler installed, along with dual electric fans. I can snap a few pics, but it will be a few days. PM me to remind me.

Re: Tranny cooler mod??
 

I'm dying to throw some electric fans in my rig but have no clue about wiring. AC in AZ doesn't care for mechanical fans lol.

Re: Tranny cooler mod??
 

The pictures are out there I just looked at them yesterday. This mod has been on my to do list for far too long. I ordered the cooler yesterday, from Oregon performance transmisaion. 139.00 shipped. Best price I could find.

Re: Tranny cooler mod??
 

pdx, could you hot link the pictures for the DIY cooler mod?

Re: Tranny cooler mod??
 

http://www.elcovaforums.com/forums/s...t=23002&page=2

Check out page 2. This was enough to make me feel comfortable doing the mod.

Re: Tranny cooler mod??
 

awesome pdx, that does help.
i need to really get on this since i am starting to have some bleed through issue with my engine and so I am sure this could be right behind it.
i would hate to get stuck out on the road in the middle of no where and look at a few thousand to fix the issue.

BTW, once the cooler is external, is there any way to remove the internal one?
(I mean without completely taking apart the trans)

Re: Tranny cooler mod??
 

I think the tranny cooler on there from GM is external as well, it just passes through the radiator.... But to tell you the truth I really dont know.

All I know is what I've read and that is that the radiator fails because the tranny is tied into the radiator you get water and tranny oil mixing.

I'll know for sure when I tear into it.

Re: Tranny cooler mod??
 

Installed mine yesterday. Went pretty smooth.

The new cooler is a tight fit. If you're off to the passenger side too much the hood won't close. I actually had to remove the bottom bolt on the power steering cooler so I could swing it over to the driver side. This allowed me to move the tranny cooler over just enough to 1) use the old tranny cooler mounting bolt hole on top driver side and 2) allow the hood to close. It's still tight. Could say it fit like a glove!

That could have ended up being the biggest setback, if I would have cut hoses and mounted the cooler without making sure the hood closed. Installer beware! : )

Glad to have finally got this out of the way. Next up is Corvette servo!

Re: Tranny cooler mod??
 

I ordered from the exact same place the other day as well.

Re: Tranny cooler mod??
 

Did you get the corvette servo also?

Re: Tranny cooler mod??
 

No. What is it for?

Re: Tranny cooler mod??
 

Firms up the shift from 1-2 and prolongs the life of the tranny.

Re: Tranny cooler mod??
 

Where did you get your Corvette Servo from and how much did it run? Also, was it hard to install? I am looking to do the same mod, wondering if it is too complicated for me or my mechanic to do...

Let me know where you got it from though if you could...

Re: Tranny cooler mod??
 

The install looked simple enough: http://www.performancetrucks.net/for...t-pics-476223/

I bought mine here: http://www.oregonperformancetransmis...de=NTP-K51828C

$16 + shipping

Re: Tranny cooler mod??
 

That's where I got mine. I'm having a tranny shop pop it in while I'm there for the flush. For an extra 45.00 it's worth it to me. I'm sick of wrenching on my truck.

Re: Tranny cooler mod??
 

Thanks for posting the price. how much was the total flush and servo costing.
I love wrenching, but my time is so scarce between 12 hour days 5 days a week and then all the other things I have to do during the week.

Re: Tranny cooler mod??
 

Tranny flush, which is low pressure, is 165-180. Servo install is 45.00.

Re: Tranny cooler mod??
 

Both servo and tranny cooler mod is very well worth it.

My tranny is running super cool and shifts from the servo install are long and firmer. Money very well spent.

Re: Tranny cooler mod??
 

My tranny's due for a flush soon. I just ordered the servo (NTP-K51828C) and I think I'm gonna also pull the trigger on the external cooler (4739-1 Tru-Cool MAX) as well.

I've been reviewing some of our old 'tranny cooler' threads, but still have some questions. Questions that I could prolly answer for myself were I were under my hood, but unfortunately I'm sitting in my office (bored). So, if anyone's got there ears on and can shoot me a few quick answers that would be appreciated.

I've read that the 'stock cooler' is 'integrated' into the radiator, I assume that means that the tranny fluid line simply runs internally, back and forth across the radiator. In a stock setup does the tranny fluid line enter the stock radiator on the driver's side and and exit on the passenger side, vice versa, or does it snake back and forth across the radiator and enter and exit on the same side?

Once the cooler is mounted is it really as simple as just disconnecting the tranny fluid hoses from the stock radiator (cutting new lengths) and plugging them into the cooler?

I'm definitely considering doing the flush, servo, and cooler all at the same time.