Took my 2002 Explorer to the garage today and they tell me I need a module for my 4-wheel drive and also my transfer case is leaking. They want $399 for the module, $1,475 for the Transfer Case, if I need a new one, plus labor and some other parts. Comes to about $2,700 worse case scenario. I have a little over 91,000 miles on it. I also had to put a new transmission in it just 2,000 miles over the warranty. Is it time to get rid of it? Any advice would be appreciated.