Try to get a multimeter on the lug on the starter while someone cranks the engine ?

If the bendix gear is broken or the teeth on the flywheel have been ground off, the starter will still spin. They take a lot to break and two aren't likely to break at the same time. The solenoid throws the big switch that allows high amperage straight through to the starter motor, without having that go through your ignition switch. Can you check to see that the motor will physically turn, pull on the fan belt, get on the end of the crank bolt? Loosen the plugs if that makes it easier. 

yup ill check that tonight because the only thing i can think of is that both starters i have are stuffed lol.

nuk1ear
and also i hooked it up to the car but not installed and it worked fine too

 
What do you mean by this, using the wires but not bolted to the gear box? Turning the key and it cranks.
 
 

3 starter motors (all bench test fine), 3 good batteries (1 500cca, other 2 are 380cca), ran 4 extra grounding straps from the gearbox and engine to the body. Checked voltage drop in the frunk and its exactly the same as the engine bay. checked the B+ wire from the battery to the starter and its physically fine.

Car started fine sunday during the day after installing the latest starter motor. Then sunday night when it was pretty cold (5deg?) it started this crap again, just clicking at the starter solenoid and then when releasing from "start" the solenoid will click back again. Appears like a lack of power from SOMETHING, but what? Logic says the battery (when its cold right?) but i tried 2 others which were perfectly charged (enough to start a late model corolla so im sure it can start this piece of junk) i have no idea in this world. Its driving me insane, completely insane.