2007 4WD AUTO - Cooling Questions

[MacAttack]

I can't get a positive, 100% certain answer on this anywhere:

Does the Stock 2007 Libby 4WD Automatic come with a tranny cooler?

If so, is it the exact same cooler that comes with the tow package?

[Beacon]

Originally Posted by MacAttack

I can't get a positive, 100% certain answer on this anywhere:

Does the Stock 2007 Libby 4WD Automatic come with a tranny cooler?

If so, is it the exact same cooler that comes with the tow package?

You can't get a positive answer, likely because there isn't one. (I went through this with my '06)

The easy answer is . . . if it's on there, then it has one.

To the best of my knowledge, there is *not* a different tranny cooler for the tow package. Just one cooler is available from the factory and I really don't know how they decide what Lib's get it. Some people I talked to said they had it without the tow package, and some said they didn't.

What *is* different about the tow package (typically) is, in addition to the electric cooling fan, there is also a large clutched fan bolted to the water pump with a rather large shroud around it.

My '06 3.7 4x4 Limited did not have a towing package from the factory, but did have a tranny cooler. When I ordered the Mopar tranny cooling kit, what I got was the fan and shroud.

Of course, I also had to put on a hitch and wiring harness. I went with genuine Mopar on these items as well.

[rob92xj]

Originally Posted by MacAttack

I can't get a positive, 100% certain answer on this anywhere:

Does the Stock 2007 Libby 4WD Automatic come with a tranny cooler?

If so, is it the exact same cooler that comes with the tow package?

All auto trans KJ's have a tranny cooler but it is not where most people think it would be it is part of the AC condensor, the HD cooling option is a added mech clutch fan, standard cooling only has a electric fan.
The tow package or off road package(not just 4x4 or trail rated) comes with both fans as they both come with HD cooling
So if you have factory tailer tow then you will have 2 fans one electric the other a clutch fan, if you only see the clutch fan look harder as the electric fan is in there.

[MacAttack]

Thanks for the information.
Now........if I want the tranny to last as long as possible should I put in an aftermarket tranny cooler, or is the stock one good enough?

Also should I get an aftermarket clutch fan (I'm too late to get one equipped)?
I will not be towing, but I will be going offroad, and I will be driving in the mountains.

My main concern is getting the tranny to last as long as possible.
200,000 miles would work just fine.

[rob92xj]

Originally Posted by MacAttack

Thanks for the information.
Now........if I want the tranny to last as long as possible should I put in an aftermarket tranny cooler, or is the stock one good enough?

Also should I get an aftermarket clutch fan (I'm too late to get one equipped)?
I will not be towing, but I will be going offroad, and I will be driving in the mountains.

My main concern is getting the tranny to last as long as possible.
200,000 miles would work just fine.

DO NOT add an aftermarket trans cooler. The HD cooling option is your best bet to bey the fan clutch as you would need the fan and shroud and you may end up paying more for it in the end(I see it happen all the time).
I have a customer with 275000+ miles on a 02 KJ that is often towing something and the only failure they had was a window regulator and door latch.

[MacAttack]

Originally Posted by rob92xj

DO NOT add an aftermarket trans cooler. The HD cooling option is your best bet to bey the fan clutch as you would need the fan and shroud and you may end up paying more for it in the end(I see it happen all the time).
I have a customer with 275000+ miles on a 02 KJ that is often towing something and the only failure they had was a window regulator and door latch.

So are you saying all I should add is the HD Cooling Option from Jeep? That only includes the clutch fan.

Once I add that fan would you recommend replacing the tranny cooler with a better one, or should I just keep the tranny cooler and the tranny pan that comes stock?

(By the way the 2002 Liberty has a different transmission than all other Libertys........supposedly more heavy-duty.........and then they decided to cut costs and change the transmission in 2003+ Libertys)

[jeepjeepster]

Originally Posted by rob92xj

DO NOT add an aftermarket trans cooler. The HD cooling option is your best bet to bey the fan clutch as you would need the fan and shroud and you may end up paying more for it in the end(I see it happen all the time).
I have a customer with 275000+ miles on a 02 KJ that is often towing something and the only failure they had was a window regulator and door latch.

Why do you say NOT to add a bigger cooler? I had been thinking about doing that this summer. I may also get the fan if i can find it without the shroud. I already have the bigger shroud.

[ralph]

I put a aftermarket trans. cooler on my Liberty..It's a '02, I've had No problems with it. Frankly, I can't see how this can't do anything but help as the stock "cooler" is a tube going through the radiator tank that probably cools the fluid off maybe 10-15 degrees, not much in my book. I ran my cooler in conjunction with the stock cooler, So, it goes from the stock cooler into the aftermarker cooler mounted in front of the radiator, back to the trans. I'd be willing to bet I'm getting the fluid cooled off 40-50 degrees. Anyway in my opinion, a trans cooler is'nt a bad idea....Now, it sounds like that they're doing something diffrent with the '07's as far as trans. cooling is concerned,(part of the AC condenser??) or you're confusing the AC condenser and radiator.. Mine was pretty basic, and simple...

[rob92xj]

If the trans fluid is kept too cold the TCM will not provide the proper shift logic and can cause premature transmission failure, the trans temp is monitored and controlled internally through bi-metallic switching valve in the valve body.

As far as the "original cooler" being just a tube ran through the radiator, it does not run through the radiator it is in the bottom section of the AC condensor and it is a dual pass cooler.

The 02-early 03 KJs have a 45RFE
late 03-07 KJs with the 3.7L have a 42RLE(RWD version of the trans used in the FWD 300M, Concord, Intrepid, LHS)
05-06 KJs with a 2.8L CRD have the 5-45RFE no differences internally between the 45 and 5-45 RFE transmissions, just different controllers to make one a 4 speed and the other a 5 speed.

[ralph]

I'm afraid I'm going to disagree with you..I just went and looked under the hood of my Liberty..it's a '02 with the 45RFE trans, the cooling lines run up to, and into the radiator tank, NOT the AC condenser, which is in front of the radiator, later ones might have been set up differently, Checking in my Haynes manual, Chap 3, Cooling ,Heating and Air conditioning, section 6, paragraph 8, Radiator, removal and installation..... 'If the vehicle is equipped with an auxiliary automatic transmission cooler remove the cooler mounting bolts and set the cooler aside, if the vehicle is equipped with a internal cooler in the radiator, detach the cooler lines from the rear of the radiator.... This is how mine is set up, again later models may have been set up diffrently....