guage

2005 Jeep SE Just ordered an aux transmission cooler and now I am wanting to add a temp gauge so I am able to see what kind of numbers I am getting. The only issue is, I have no clue on how to do that. I know the general idea of it but I am always an overthinker and want to make sure I know what...

Sooo every time I start my tj the oil pressure does not read at all, I shut her down and restart and it registers normal. This is how it goes every time without fail. I changed the sending unit so now I'm wondering if its the guage.