Transmission in DD

[timber74wolf]

Headed to work this morning I noticed that the exhaust sound changed tone as I was going over the overpass and onto the downside of it. I thought that was weird. So I went on and it did it again on the next over pass. So I looked at my RPM gauge and the RPMs jumped up like the torque converter unlocked. As I reached the bottom of the overpass the RPMs dropped to 2,000 at cruising speed. So cruising on it did it again until I approached the next overpass and it stayed at 2,000 RPMs and as I topped it and headed down the RMPs increased to 2,5000 and stayed there until the next overpass and the RPMs dropped as I started up it. If I give it some gas the RPMs drop to normal. Let off the gas and the RPMs jump up as the torque converter unlocks. And when I set my cruise control the RPMs fluctuate from 2,00 to 2,500 and back. This is my daily driver so any ideas will be appreciated. Right now I am gonna go check my fluid level. Tranny only has a 103K on it.
Also could anyone suggest a reputable Tranny shop in the Houston, Tx area if my tranny needs a rebuild. Does Circle D tranny or just torque converters?