2000 Silhouette rev limiter

Can someone tell me the rev limiter on these vans? When i give it a good shot of gas the van will sputter and miss usually everytime at roughly 4000 rpm, when i let off ever so slightly it then changes gear. 4000 seems a bit low for the limiter to kick on but i could be wrong, sometimes it will rev past 4000 and shift fine..

Any suggestions
Thanks

you gonna blow an intake or head gasket revvin it up like that. then you ain't gonna be happy. that little 3.4 ain't no 350. it will give you enough headaches and an empty wallet without just down right begging for it.