Jeep AW4 Transmission Cooler?

RockMonkey · Mar 11, 2009

This is my first AW4. Is this cooler sufficient?
http://store.summitracing.com/partd...&part=BMM-70268&N=700+400004+115&autoview=sku

How about this smaller one?
http://store.summitracing.com/partd...&part=BMM-70255&N=700+400004+115&autoview=sku

I'm planning on mounting it in front of my XJ radiator. I want it big enough to keep the transmission cool, but I don't want to block more of the radiator than I have to.

Herzog · Mar 11, 2009

Either one of those will do. I believe the stock AW4 cooler is about 5" x 11". I can verify this weekend.

RockMonkey · Mar 11, 2009

I'm keeping my air conditioning. Will mounting it in front of the AC condenser restrict the air flow too much? It would suck to have a nice cool transmission and a warped head. :sick:

STAG · Mar 11, 2009

Herzog said:
Either one of those will do. I believe the stock AW4 cooler is about 5" x 11". I can verify this weekend.

The stock trans cooler on XJ's are inside the radiatior...?...

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This is the one I use.. I don't have a guage but it seems to work great... and doesn't block airflow too much.. (engine doesn't overheat w/ it mounted in front of my radiator) ~$30 for the kit @ Autozone...

RockMonkey · Mar 11, 2009

Do you still have functioning AC? Did you mount it in front of the mechanical fan, or the electric fan?

STAG · Mar 11, 2009

You can see mine pretty well in this attached pic.

RockMonkey · Mar 11, 2009

Chocflip201 said:
The stock trans cooler on XJ's are inside the radiatior...?...

If your XJ came with a factory "HD towing package" then it had an auxiliary cooler as well as the radiator cooler. My XJ was a manual from the factory, so I was surprised to find that my radiator appears to be set up for the transmission cooler.

I guess it's one size fits all.

RockMonkey · Mar 11, 2009

Chocflip201 said:
You can see mine pretty well in this attached pic.

AC condenser still there and hooked up?

STAG · Mar 11, 2009

Yeah everything was still hooked up (That jeep is now stripped and being parted out). Also, I could definately tell it was working because I went for a drive, and put my hand on the transmission-out line (the hot line, before the trans cooler) and it was much hotter than the line feeding the cooled fluid back to the trans (after the trans cooler)

Herzog · Mar 11, 2009

RockMonkey said:
If your XJ came with a factory "HD towing package" then it had an auxiliary cooler as well as the radiator cooler. My XJ was a manual from the factory, so I was surprised to find that my radiator appears to be set up for the transmission cooler. I guess it's one size fits all.

Mine came with only with an external... no hookups inside my stock radiator. Could depend on the year I suppose. Mine was an '89.

STAG · Mar 11, 2009

RockMonkey said:
If your XJ came with a factory "HD towing package" then it had an auxiliary cooler as well as the radiator cooler. My XJ was a manual from the factory, so I was surprised to find that my radiator appears to be set up for the transmission cooler. I guess it's one size fits all.

as far as I knew it had the towing package because it had the D44 rear end and the "Comfort/power" trans shift point switch... but I only had the in-radiator cooler... no aux... Edit* mine was an '87 too...

Brett · Mar 11, 2009

Herzog said:
Mine came with only with an external... no hookups inside my stock radiator. Could depend on the year I suppose. Mine was an '89.

To add more confusion....mine's an '89 as well, but it run's into the radiator then out to the trans cooler in front of the condensor!

Brett · Mar 11, 2009

Chocflip201 said:
as far as I knew it had the towing package because it had the D44 rear end and the "Comfort/power" trans shift point switch... but I only had the in-radiator cooler... no aux... Edit* mine was an '87 too...

Pretty sure the comfort/power switch didn't have to do with it having or not having the towing package. Just an option that was later deleted in the HO models.

Herzog · Mar 11, 2009

Brett said:
To add more confusion....mine's an '89 as well, but it run's into the radiator then out to the trans cooler in front of the condensor!

Oh how strange... I know that my radiator does not have extra ports for the transmission lines, that's for sure. Time to search around for this odd-ball dilemma.

STAG · Mar 11, 2009

uhmmm... mine was a pioneer model...?

RockMonkey · Mar 11, 2009

The entire cooling system changed over at some point too. 90 or 91, I think. Mine's a 92, and has the newer system.

Herzog · Mar 11, 2009

Chocflip201 said:
uhmmm... mine was a pioneer model...?

Same here.

RockMonkey · Mar 11, 2009

So, they just threw in whatever they had laying around?

Maybe whatever was on blue light special?

I know mine was a custom order. My dad spec'd it and ordered it from the factory in '92. We waited like a month to get it. That may account for some non-standardness on it.

mbryson · Mar 11, 2009

Braden, there will be a LOT different between the earlier Renix 4.0L XJs and your HO. I don't remember if my HO had a cooler or not.

STAG · Mar 11, 2009

RockMonkey said:
The entire cooling system changed over at some point too. 90 or 91, I think. Mine's a 92, and has the newer system.

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I thought '95 was the last year they used the old system... (mine had it.. I'm doin research now...

this '93 didn't have an aux trans cooler... just radiator..
http://www.cardomain.com/ride/325707/11

Jeep AW4 Transmission Cooler?

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