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XJ Ask the Question Thread
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
CF Veteran
Joined: Jan 2012
Posts: 8,272
Likes: 1
From: Baltimore, MD
Year: 1999
Model: Cherokee
Engine: 4.0 I6 HO
Originally Posted by XJwonders
Could a 96+ np231/242 tailhousing swap over to a 1991 t case?
Originally Posted by a_shirey
The answer is possibly, but the 96+ output/tailhousing is much shorter than the earlier ones. Creating a need for a longer drive shaft.
CF Veteran
Joined: Jan 2015
Posts: 1,381
Likes: 3
From: Southern Maryland
Year: 1991
Model: Cherokee
Engine: 1999 4.0L
Housing should be portable but the main shaft isn't. Probably ought to see what is specific to 96+ about the kit that was purchased
Last edited by ehall; Jul 19, 2015 at 11:29 PM.
Originally Posted by ehall
Housing should be portable but the main shaft isn't. Probably ought to see what is specific to 96+ about the kit that was purchased
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Earlier main shaft does not have a machined surface for the output seal
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
'93 YJ 4.0L (open cooling system, like HO Cherokees)
Thought my cooling problems were entirely intermittent, but I've figured out it only creeps up (eventually burning coolant) if I'm at 2500+ RPM. If I bring it down below that number, it cools back down.
When we did the motor swap a couple thousand miles ago, we replaced the water pump, thermostat, and temp sending unit. The radiator and cap have about 10k miles on them and no damage. Coolant level is good.
I'm wondering if it could be an issue of the 23 year old A/C condenser (which covers the majority of the rad) being heavy damaged and not allowing enough airflow to keep up with higher RPMs.
My current plan is to burp the system for the sake of surety, and remove the condenser because an OBA conversion is in my future anyway. I'm hoping these steps will resolve the problem, but am I missing something?
Thought my cooling problems were entirely intermittent, but I've figured out it only creeps up (eventually burning coolant) if I'm at 2500+ RPM. If I bring it down below that number, it cools back down.
When we did the motor swap a couple thousand miles ago, we replaced the water pump, thermostat, and temp sending unit. The radiator and cap have about 10k miles on them and no damage. Coolant level is good.
I'm wondering if it could be an issue of the 23 year old A/C condenser (which covers the majority of the rad) being heavy damaged and not allowing enough airflow to keep up with higher RPMs.
My current plan is to burp the system for the sake of surety, and remove the condenser because an OBA conversion is in my future anyway. I'm hoping these steps will resolve the problem, but am I missing something?
Originally Posted by NewKindOfClown
'93 YJ 4.0L (open cooling system, like HO Cherokees)
Thought my cooling problems were entirely intermittent, but I've figured out it only creeps up (eventually burning coolant) if I'm at 2500+ RPM. If I bring it down below that number, it cools back down.
When we did the motor swap a couple thousand miles ago, we replaced the water pump, thermostat, and temp sending unit. The radiator and cap have about 10k miles on them and no damage. Coolant level is good.
I'm wondering if it could be an issue of the 23 year old A/C condenser (which covers the majority of the rad) being heavy damaged and not allowing enough airflow to keep up with higher RPMs.
My current plan is to burp the system for the sake of surety, and remove the condenser because an OBA conversion is in my future anyway. I'm hoping these steps will resolve the problem, but am I missing something?
Thought my cooling problems were entirely intermittent, but I've figured out it only creeps up (eventually burning coolant) if I'm at 2500+ RPM. If I bring it down below that number, it cools back down.
When we did the motor swap a couple thousand miles ago, we replaced the water pump, thermostat, and temp sending unit. The radiator and cap have about 10k miles on them and no damage. Coolant level is good.
I'm wondering if it could be an issue of the 23 year old A/C condenser (which covers the majority of the rad) being heavy damaged and not allowing enough airflow to keep up with higher RPMs.
My current plan is to burp the system for the sake of surety, and remove the condenser because an OBA conversion is in my future anyway. I'm hoping these steps will resolve the problem, but am I missing something?
Step 2; buy a Cherokee or a Comanche
Step 3; come back and revel in your new enlightenment
CF Veteran

Joined: Feb 2015
Posts: 1,528
Likes: 2
From: North Carolina
Year: 1993
Model: Cherokee
Engine: 4.0
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Enlightenment? You're starting to sound like the punk *******s who come in here telling me to leave after I answer their questions because I drive something different.
For those unaware, I started in an XJ. Rolled it. Bought an MJ and jumped it a few times. Now I have a YJ and a J10.
Back to the cooling system...
For those unaware, I started in an XJ. Rolled it. Bought an MJ and jumped it a few times. Now I have a YJ and a J10.
Back to the cooling system...
CF Veteran

Joined: Feb 2015
Posts: 1,528
Likes: 2
From: North Carolina
Year: 1993
Model: Cherokee
Engine: 4.0
Enlightenment? You're starting to sound like the punk *******s who come in here telling me to leave after I answer their questions because I drive something different. For those unaware, I started in an XJ. Rolled it. Bought an MJ and jumped it a few times. Now I have a YJ and a J10. Back to the cooling system...
Moderator CF K9-unit
Joined: Apr 2012
Posts: 5,842
Likes: 12
From: Alaska
Year: 2000 sport
Model: Cherokee (XJ)
Engine: New 4.0l from s&j engines
I would try this, listen to your head Clown your brain might be onto something.




