KK TRANSMISSION INLET AND OUTLET?

[JDTERLAJE]

Howzit fam!

Coming over from the Dodge Nitro group. Wasn’t much help there, so thought I’d try the KK brethren.

I’m adding an external transmission cooler in front of the condenser, and need some help if anyone has some insight. I mainly need to find the outlet tube/pipe from the condenser/cooler to route it to the external cooler and back to the trans.

So the reason I need another cooler is because I have a front steel bumper, roof rack / steel side rails, and I run 33” tires. The load is straining the transmission and causing it to overheat even during the cold winter over here in Vegas.

so with research I’ve done, I can see facing the condenser, that there are 2 cooler lines at the top right hand corner of the condenser. I assumed one of them were an inlet and would be hot, but they’re both same temp. So I’m stumped and lost on why there would be 2 outlets going back to the transmission.


But… the bypass is on that side as well for both pipes, so wouldn’t that be the side where transmission fluid is release into the system and goes back into the transmission?

Please help a Brutha out! I just need to find the outlet, so I can get this cooler set up.

thanks Fam

 

[KJowner]

45RFE?
This is the ports on the gearbox, follow the lines to the cooler.

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[JDTERLAJE]

45RFE?
This is the ports on the gearbox, follow the lines to the cooler.

You must be registered for see images attach

Mines a 42RLE

 

[KJowner]

I've been through the manual and typically it doesn't have a drawing for the 42RLE

 

[KJowner]

Google gives this, but check it.

 

[JDTERLAJE]

Google gives this, but check it.

Yah the problem with this layout is the nitro and KK have that AC condenser that the top 1/3 of the condenser is the cooler. The transmission lines I believe are the ones at the top right hand side. But it doesn’t give out which pipe is the inlet or outlet. I took temp of both to see which would be out inlet side (that’ll be hotter) but they’re both the same exact temp and are cool to the touch. Trying to avoid removing the pipes and seeing which squirts out first because of a mess I don’t want to have to clean up after lol.

You must be registered for see images attach

 

[KJowner]

The drawing shows flow from the lower port on the gearbox, needs more Google searching to confirm.

 

[KJowner]

Any pictures of your Nitro? They are rare here and I've never seen a lifted one.

 

[JDTERLAJE]

Any pictures of your Nitro? They are rare here and I've never seen a lifted one.

Sadly I don’t have much pics after I added the 33’s lol. Here’s one I took when I was tire rotating a few months ago lol

You must be registered for see images attach

 

[KJowner]

Nice

 

[DadOSix]

I did not think the direction of flow would matter. Is there a check valve involved somewhere?
Also - I never had much faith in the ‘in rad’ coolers. They seem woefully undersized on the last one I saw when dinosaurs walked the earth and a guy could go to a radiator shoppe to get a repair. Waaay back!

 

[JDTERLAJE]

I did not think the direction of flow would matter. Is there a check valve involved somewhere?
Also - I never had much faith in the ‘in rad’ coolers. They seem woefully undersized on the last one I saw when dinosaurs walked the earth and a guy could go to a radiator shoppe to get a repair. Waaay back!

Agreed Brutha, but my main reason is just in case the cooler on the condenser isn’t serving its purpose, I wanna have peace of mind that the fluid is going into the external cooler last before returning. That way I know. But then again I’m still having trouble finding either outlet or inlet lol.

And I completely agree man. That integrated condenser cooler is dumb. One ***** out, gotta replace the entire condenser.

 

[KJowner]

If you have a look on Google there is a lot of stuff about people fitting a second cooler onto a KJ, they just add it in series to the existing one and mount it in front of the cooler pack.

 

[joshgoble]

Howzit fam!

Coming over from the Dodge Nitro group. Wasn’t much help there, so thought I’d try the KK brethren.

I’m adding an external transmission cooler in front of the condenser, and need some help if anyone has some insight. I mainly need to find the outlet tube/pipe from the condenser/cooler to route it to the external cooler and back to the trans.

So the reason I need another cooler is because I have a front steel bumper, roof rack / steel side rails, and I run 33” tires. The load is straining the transmission and causing it to overheat even during the cold winter over here in Vegas.

so with research I’ve done, I can see facing the condenser, that there are 2 cooler lines at the top right hand corner of the condenser. I assumed one of them were an inlet and would be hot, but they’re both same temp. So I’m stumped and lost on why there would be 2 outlets going back to the transmission.


But… the bypass is on that side as well for both pipes, so wouldn’t that be the side where transmission fluid is release into the system and goes back into the transmission?

Please help a Brutha out! I just need to find the outlet, so I can get this cooler set up.

thanks Fam

Are you replacing the original one or you just adding to the system another cooler in line for the oil to run through both of them. And if both lines are cool and you've been running in the transmissions overheating you may not have any fluid going too the transmission cooler because it wouldn't have two porch coming out and even if it did they would both be hot if the oil is hot The cooler is only to keep it from overheating and deteriorating the oil but it's not going to be a drastic temperature change to where you could actually touch it hold on to it and not get burned. Because 180° is going to be hot no matter which side of the cooler you are on

 

[joshgoble]

The drawing shows flow from the lower port on the gearbox, needs more Google searching to confirm.

To the best of my knowledge the low port is the return on the transmission the top port is discharge .lower port it ties into the filter .I can walk outside and look at the one I've got a part and tell you pretty quick.

 

[joshgoble]

I did not think the direction of flow would matter. Is there a check valve involved somewhere?
Also - I never had much faith in the ‘in rad’ coolers. They seem woefully undersized on the last one I saw when dinosaurs walked the earth and a guy could go to a radiator shoppe to get a repair. Waaay back!

There was no check valve on mine it flow either direction.

 

[joshgoble]

Mines a 42RLE

Not much difference between the 42,45,,545 in all honesty whenever you are talking about the oil cooler lines.

 

[KJowner]

To the best of my knowledge the low port is the return on the transmission the top port is discharge .lower port it ties into the filter .I can walk outside and look at the one I've got a part and tell you pretty quick.

The 2 drawings I found had the 545 upper port as discharge and the 45 as lower port discharge. I don't own a 45 to took at though so I can't check. The 545 one is from the manuals so should be correct.

 

[joshgoble]

Well that would be completely correct if you're talking about the pressure line going into the pan that's flowing through the filter and through the jet but if you're wanting to discharge out of the transmission going to the cooler pre-filter the hot oil is coming from the top port going to the top port of the condenser coming back down and flowing through the bottom port being pressurized through the filter and jetted back into the pan so technically speaking this drawing would be correct as far as the discharge line being returned back to the pan and filter it just fends how you want to look at it but if you cut both lines into it's going to spray out of the top line

 

[joshgoble]

As a fully functional complete unit Yes the discharge is a lower line because it's discharging back into the pan into the transmission but if you separate it and you want to know which one of the discharge line coming to the oil cooler it's going to be the top one