Hi, im new to this forum and hope there is something y'all could help me with. I just got a '06 traiblazer that someone had been driving in 4x4 and now it will drive about 5 miles then it loses all its gears. If i let it set not running for about 5 minutes i can drive it again for another 5 miles, so on and so forth. The question is do i have to replace the whole trans or is there a cheaper easier way to fix it? Like changing out the valve body. Any help would be greatly appreciated. Thank you.