Had the axles, wheel bearings, and front struts replaced.. a cpl weeks later, on the freeway at 80mph, the transmission stops shifting. Car sort of bogs down. Cant get any power out of it. If i shut it off and let it sit for a few minutes, its fine again, until the next time. I have recently replaced the battery (new), and alternator (junkyard) due to failure, and i know a similar issue will arise when the electrical current is weak, but what could be causing this? At a loss, and NOT a transmission guy. Fluid level is good, and reasonable in color.