Ok heres the backstory...

lots of play in rear wheels (1991 turbo)
pressed in new bearings on the passenger side. solved.
drivers side on the other hand, its not a wheel bearing its a bushing. There is no up/down play, only side to side. i can see which bushing it is, its actually more of a plastic sleeve. here are 3 pictures, hopefully someone can tell me what it is so i can get the part for tommorrow (cars still up on a lift about 20 mins away)

thanks everyone

like i said this is the drivers side.

that circled bolt has a plastic sleeve around it. the passengers side is nice and tight, but this side has play, and allows the wheel to move left/right.

 

is it the trailing arm bushing? i really need to get my car out of my buddys bay :/
like tommorrow

 

From what you describe, it sounds like the toe control hub. This was part of Mazda's Dynamic Toe Control Steering. When these bushings go, most folks replace them with an aftermarket piece that does away with the DTCS. The replacement sets are available from Mazdatrix. Their website also has a good set of photos to walk you through the replacement.

 

It looks like a rear toe eliminator. If it isn't, I'd suggest getting them from Mazdatrix or Racing Beat instead of the stock ones. It looks like you might already have one on one side though. Can't quite tell.

 

As was said: That would be the “rear steer”, “rear toe”, or “DTC” bushing. During hard cornering the bushing should give, adding tow and essentially steering the rear of the car. Yours appears to be defective.

Most people replace them with solid bushings found here:
http://www.mazdatrix.com/h6_86-92.htm

You should replace both sides. The page above includes these installation directions:
http://www.mazdatrix.com/faq/rrsteer.htm