Hallo, I've a CUCV M1028 with 6.2, TH400, NP205. When starting from a stop the trasmission stutters like crazy for the first few meters on flat surface, the heavier the throttle or the load, the more it stutters. As it gains some speed things suddenly get normal, and it upshift and run perfectly. If starting on an incline it stutters 'till it can gain enough speed, but if speed cannot be achieved it stutters for the whole climb. It's as bad as it sounds. Engine is ok. The rig is lifted 6" but beaing a lwb don't think a driveshaft vibration or worn/loose U-joint should give this kind of behaviour, or at least not only when starting. So back to the TH400: could it be a faulty converter (faulty one-way stator bearing inside)? Or a first gear clutch discs? But then it should not stutters if I put it in 1st instead of D, as the tranny uses now also 1st gear bands... Could it be a pressure related thing, some leaky passage gasket or piston inside the valvebody? I know the tranny has a Transgo kit stage 1 installed. Help!