Takes a second or two to go into gear. I start my mighty Comet, shift to reverse and it takes a second or two to actually go. The same goes for foreward gear. This happens only at first when I fire up the car. After a drive it stops doing it. Um...wtf yall?
My car does that going into first... try a vacume modulator, check all vacume lines going to the tranny. Also let it warm up abit (couple minutes). check fluid level... hope that helps.
If you have a auto you need that vacuum line unless you install a manuel valve body kit... even then I don't know.
First off: Change your fluid and filter, check the bottom of the pan for a lot of debris... if it all looks good, you might want to get a 300 pound test guage and the hose to connect to the left side of the trans, near the shifter (it's just a bolt there, easy to find) Check the pressures coming out, see what it says,
I ran the car for a few minutes and checked the fluid and it was looooow so I added a half quart of fluid and it drives like a different car now. Smooth shifts, no lag and it even sounds better. The hump gets less hot too.