What year H2 do you have with ATF & antifreeze mixing in radiator?

[tomp]

Please participate in the poll if your radiator failed allowing ATF fluid and antifreeze to mix together causing transmission failure

[pteam]

Well I own 5 H2's right now, 4 are limos which are under extended load up to 25 people and alot more weight and havnt had any tranny or radiator problems, thank god. :)

[MONSTERMATT]

u should definately install the 4739 and by pass the stock trans cooler i just did it and problem solved

[jmsspratlin]

u should definately install the 4739 and by pass the stock trans cooler i just did it and problem solved



What is this 4379 thing you speak of and how much is it?

[MDimitri]

What is this 4379 thing you speak of and how much is it?


He is talking about the True Cool Transmission cooler and bypass...Looky:

http://www.bulkpart.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=2&Product_Code=4739&Category_Code=tru-cool-hd&Product_Count=3

[tomp]

Have you had these things on the highway in 100 degree temps and still the temps didn't climb?

Well I own 5 H2's right now, 4 are limos which are under extended load up to 25 people and alot more weight and havnt had any tranny or radiator problems, thank god. :)

[tomp]

Hey guys, the reason I posted this poll is because the support guy over at http://www.rondavisradiators.com/radgallery.htm is telling me they use the same GM internal radiator tranny cooler in their custom performance radiators and that GM resolved this issue some time ago.

I have an 06 and just pulled the trigger on their custom H2 radiator and was a bit concerned when I found out they used the same internal GM tranny cooler. I am still under warranty and the last thing I wanted to happen was this internal leak in an aftermarket radiator. I would be kicking myself for having the issue underwarranty, only to be told it was not covered due to the aftermarket radiator.

The good news is, according to them the late model H2 should no longer be experiencing this issue. However, they were not able to confirm what year or VIN number ranges that this was resolved in.

Let's keep this poll going to see some trending and we then can possibly can tell what year or mid-year (roll-off from previous year) the issue was resolved.

[tomp]

http://www.rondavisradiators.com/H2-ALUMINUM-RADIATOR.jpg

[pteam]

Have you had these things on the highway in 100 degree temps and still the temps didn't climb?

Well our hummer limos run year round, in 95 degree weather and 0 degree weather with alot of idling at weddings and bars, and no problems yet.

[MONSTERMATT]

All i know is that if u take the chance , and dont change out to the super cool u better be under warranty or ur really gonna get bent over by the dealer or whoever does the tranny replacement and hoses etc, NIGHTMARE!!!!!:mad:

[KenP]

Please participate in the poll if your radiator failed allowing ATF fluid and antifreeze to mix together causing transmission failureWhat about those of us that didn't have a problem? Shouldn't there be an option for the tens-of-thousands of owners that didn't/don't have a problem with this?

We had an '03 with an LPE SC engine with no problems and an '05 with lift and 38's with no problems.

What are you looking for, exactly?

[tomp]

Hey Ken....mainly looking for those year models that have only had the issue.

[rusty]

2005 w/ about 22k when happaened. Sucked 2 quarts t fluid into radiator

rebuit trans and replaced all the seals and radiator under wty

[CDiprecision]

Where are these trans coolers being mounted?? they're pretty big.

[MONSTERMATT]

these are pretty easilly mounted where the older trans cooler is if u search the "trans cooler" on here youll see pics

[OrangeCrush]

Well I own 5 H2's right now, 4 are limos which are under extended load up to 25 people and alot more weight and havnt had any tranny or radiator problems, thank god. :)

You will....


It's only a matter of time. Every GM truck I have had has the lines break in the plastic tanks and will fuk your day up.

That's why when I installed the supercharger, the first thing I ordered was an aluminum radiator.

[tomp]

Hey OC, I was chatting with a guy from Ron Davis Radiator today anc he had a couple of things to note. One was that he said all of the radiators he had with internal tranny cooler failures were with Magnuson SCs on them - specifically this brand SC only. The other thing he said, was that most aftermarket radiator companies still use the internal GM tranny cooler (AC Delco) in their radiators.

I just purchased a custom H2 Ron Davis Radiator and it showed up Friday bent! Then on top of that, they said I had to work it out with UPS as it was shipped perfect and they have pics of it. Worse case, I file claim with my credit card company:popcorn:

[Boar-Ral]

I just picked up my H2 last week from the dealership after this happened to me and my wife. We were 150 km outside of the city on our way camping and suddenly the engine surged, redlined, and the transmission temperature warning came up on the instrument cluster. I called roadside assistance and they informed me that they would only cover $100 of a tow, or approximately 50 km, leaving me to cover the remaining 100 km. If I drove another 50 km in the opposite direction, away from home, I would then be covered under the trip interruption coverage, and they would provide money for meals, hotels, and a replacement vehicle. I was not sure what was wrong though, and I just wanted to get home after putzing under the hood on the side of the highway for 30 minutes, so we limpted it home in second gear. What a pain in the arse. At least the dealership got it in fast and replaced everything. It works well, but I would agree with the others here that a bypass would be the best solution.