Daily Driver firebird has a strange booboo

[darkz711]

So when I am in my comute to school i notice that around 60-70 mph, that if the car is in the range of 1900-2100 rpm it will get stuck in that range for 5 seconds, whether or not i floor it or not and then it will kick out and start moving. It also feels really funny when driving it too around that time. Something in the back feels like its shaking or seizing up. Anyone have any suggestions

its a 1994 firebird 3.4L auto

[Ouija]

Check to see if you have thrown any tire weights, or diveshaft weights.

Other than that, I'd reccomend you take it into a shop and have them go once over the suspension to make sure nothing is amiss back there.