the taco wont start!

There is a simular thread but Im gunna ask anyway. 98 Tacoma, when I try to start it it clicks like the battery is dead but it 100% fine. If I push the truck a few feet it will sometimes start. The problem seemed to only be after I put it in park AFTER it was dumped, if I put in park before I dumped it it was fine. Lately its gotten worse and does it all the time even when the truck wasnt layed out. Im going to try a starter but I get the feeling that thats not it. My grounds are fine btw, every thing seems ok. I did relocate battery to the rear. Any help would be great, I cant drag my truck!

spit on it and rub it

my truck was doin that the other day and it was because where my ground is the wire jamed against the fram and was shootin pretty sparks every where hehe i just pulled the wire down and it starts everytime again

check ur starter it might be going bad