Nikon D700 live view problem?

I use live view often as a means of previewing my shutter speed once I set it, (btw I always use manual mode) this was when I used my canon t3i, and it was so that I could decide which shutter speed was best so as not to over or under expose the shot. I have since upgraded to a Nikon d700, but every time I use the live view when I'm in manual mode, it auto exposes the shot for me in the live view, and I'm unable to see the final shutter speed(exposure), the one I've set with the dial, until I have taken the picture. I can't preview the shutter speed in live view before I take the image, is there any fix for this? I also use a Nikkor 50mm f1.2 lens, i don't know if it could be an issue with this lens b/c it's manual focus only? (I tried to explain this the best I could:/ sorry if it's a bit confusing.)

Yikes!

I'm surprised that you use your fine D700 as you would a P&S camera, using the LCD screen to control the camera and composition.

Using the LCD on a digital SLR camera can really slow down your productivity, especially when shooting things like fashion, sports and action.

The lag from when you view the live view image to when the shutter actually actuates, is just dreadfully long.

Try using your D700 the way most of us do… Look through the viewfinder. Everything you need to know is shown there, ISO, shutter speed, lens aperture, a lightmeter, number of image files left on the memory card and much, much more.

The other issue with using live view is that it uses a whole lot of battery power.

Where did you learn the bad habit of using live view when shooting with a digital SLR?