I am somewhat having the same problem. Only mine isn't limited to first gear. I have noticed that it quickly got worse with the weather...maybe that has something to do with it?

Troy 98 E0 Silver Frost SVT Born 7/15/1997 My B-Day 7/16/1979 Coincidence....Na SCA CAI Sho-shop Hi Flow Y-pipe Custom Cat-back w/ Borla XR1 Mufflers Sho-shop pulley set with crank damper Magnecore Competition Wires MGK Iridium spark plugs