My 2008 4WD is doing a hard start and when it starts it drags moving either forward or at revise. And at every time it changes gear. Most especially when climbing uphill it losses power that it drags so horrible for about 30s before it picked up. And when it picks fires well move well until d next transmission. I ve drained d gear oil and cleaned d gear switches. But d issue still persists. Please any one with useful ideas? Thanks.