Utah-Jeepster, I would like to add an external trans cooler inline with the factory unit built into the radiator. Can you tell me more about how you did yours? Cooler brand used and parts needed to complete the job? I have a 2006 TJ daily driver with the 42RLE overdrive trans running 33x12.50...
Axle swaps can be expensive for a TJ, many axles are not setup with the proper mounting brackets. If you have a YJ it may be easier to find a dana 44 or ford 8.8 which can drop in without much work or cost because there already setup for leaf springs. These axles can be found in junk yards...
Let me just start off by saying that every Jeep is different. I don't know why that is but they are.... well, except for the fact that they will just empty every pocket of money that is. After performing all the mentioned mods on my 2.5L in my opinion the 4.88's was the biggest gain but costly...