Weird shifting and temp problem

[bryceba]

I dont know if my guage has broken but my temperature doesnt get over a hundred. That is the minimum reading on the gauge. Another thing, when I am in over drive and I floor it or give it some good throttle it shifts into third and accelerates and then does what seems like shifting again and the rpm's drop about 600 and then after its time to shift to OD it does. Any help?

I have a 5 Inch exhaust and a AFE stage 2 intake with an edge evolution programmer. I didnt know if that would help at all. The Gauge that is acting up is an isspro. The truck has 106k on it. I just bought it at 99k so im not sure what if any tranny work has been done. I do have a warranty for 17k more miles

[alabamafrog]

Unless it is very hot and/or you are working it hard then it usually will not get above 100. If it is staying low that is a good thing. I bet the rpm drop you are seeing is when the torque converter locks in.