Transmission problems

[skippy]

So my Dad has 2000 jeep cherokee with the 4.0 been a great rig lately while he is driving it and starts pulling a hill or working it a little harder than normal it starts spewing transmission fluid out of the breather ......What would cause this????? We replaced the torque converter and the problem is still there any help is appreciated the jeep shifts great and no signs of slippage

 

[Kiel]

Sounds like its getting too hot. Any type of cooler? Any other mods to the jeep? Tires, axles, gearing etc

 

[skippy]

just the usual 3 inch lift with 31s and he put 4.10 gers in it other than that its stock

 

[Tranny Frank]

cooler X2

Over heating #1 cause,
Or sometimes imput seal failure on T/C and it overfills, and spews out that vent tube,,

Which trans?