Try making sure your transmission is not overheating, as well as check the fluid inside it as it could just be low or needs changing.
gears are slipping or not enuff fluid in transmission
Could be the gears slipping. Might need new gearbox.
IF the transmission is slipping when it shifts, I would say it's too late for changing the fluid. I have been in touch with many people who have had these trannies go out. I've had two that first starting slipping when they shifted from second to third gear.I'm in the process of taking one apart to see if I can learn what is causing it to fail. I wouldn't spend very much on an overhaul as they aren't worth it.
between shifts would be about like an 20 minute period time between shifts
if its slipping it may be going out or just needs a full trany service. you can get all the stuff at napa
the serpentine belt may be slipping then grabbing as the tranny shifts gears.
You probably have a slipping clutch band in your transmission. Take it to a transmission shop.
Between them.
It's not shifting into neutral, the 3rd gear "drive" band is slipping. Time for rebuild.
If the transmission is slipping (the engine revs up when it shifts), if the transmission shifts late, even under normal acceleration, or if the tansmission simply won't shift, you should get it checked. Also make sure the fluid level is adequate.
have vehicle scanned to determine the problem
most likely your transmission is slipping and usually is the onset of your transmission going