So i just passed 108,000 miles on my 2003 explorer 4.6L 4x4. and my transmission has begun to slip. EX: rpm goes from 2k to 4K and my speed increases by about 3 mph, not typical of my truck at all. I Did a brown wire mod a while back(and havnt realy dont much tire roasting, not even a burn out). im not sure how these T-cases are made, but i think it just goes straight through in 4x2 so im probably 90% sure its my transmission failing. I was wondering if at this early phase (done it twice in the last week), if it is still fixable, or if i am looking at a rebuild / replacement. Also, has anyone else had this fixed? about what did you pay for the repair or rebuild. Thanks guys Jared.