Hey guys, i have a slight issue, well kind of a big issue lol. i have a 2000 4.3 S10 blazer 4x4. The transmission was rebuilt less then a year ago and it shifts smoothly thru all gears wuth no problem. but when it gets to about the 50-60 mph mark it feels like its kicking its self out of overdrive or something. Idk what it is because idont know much about transmissions and id rather not spend the money to get it checked out and replaced if its something i can perform at home. i do work on my own stuff all the time, just never messed with transmissions. any help would be much appreciated!!! Hope to hear back from somebody. Thanks!!