yah well your both wrong, its what i was taught in school a long time ago. google it and youll find the same thing.

 

like this
Posi-trac is General Motor's term for their limited slip differentials. Ford calls theirs Trac-Lok and Chrysler is Sure-grip.
The function of all three is the same. They use a system of clutches in the third member to apply the same amount of power to both rear wheels, but will still slip enough to allow the differential to work.
As long is power is applied through the drive shaft, both wheels pull the same regardless of the surface. If one wheel is not touching the ground, as in jacked up, the other wheel will allow it to drive off the jack. If the power is applied by one wheel going faster than the other as when turning, the internal clutches slip allowing the differential to work.

and this

Posi-Track is a shortened generic term for the GM-branded name "Positraction." It is a type of limited slip differential.

Read more: What Is Posi Track? | eHow.com http://www.ehow.com/about_6456301_po...#ixzz1EZLZKt00

 

I guess my automotive teacher was wrong. Now I will never say they are different. I feel so bad for ford and Chrysler and there crappy Names. Lol.

This build is looking pretty sweet.

 

Haha, both y'all got owned!

 

Wow, positraction is a GM name that goes back to the 50's! It's always meant when one wheel (the right-rear) starts to slip the other wheel kicks in and grips too. Later on the same technology was brought to FWD cars in the form of traction control!

Positraction is limited slip differential. What you guys were thinking of is lime-lock or detroit-locker which locks the rear end gears and makes both tires spin all the time simutaniously.

Sorry but your teacher isn't a good one since positraction has been around probably before he was born!

In the 1950s and 1960s many manufacturers began to apply brand names to their LSD units. While Packard pioneered the LSD under the brand name "Twin Traction" in 1956, the most famous of these in the USA was Chevrolet's "Positraction". Since then, Positraction (often shortened to "positrac" or merely "posi") has become a genericized trademark for LSDs in the USA.

http://en.wikipedia.org/wiki/Limited_slip_differential

 

wikipedia isn't a valid source.... But whatev lol, I was told that they were different. No biggie

 

Ok how how about these:
http://www.howstuffworks.com/differential.htm
http://answers.yahoo.com/question/in...2212919AAA2J3g
http://www.dtmpower.net/forum/archiv...-traction.html

 

Ok I get it. I was wrong. I'm only human, you know... Someone once told me that posi was different from limited slip, so I guess it just stuck in my mind that way.

 

OK I dont mean to rain on your parade here and maybe you already know this but this is a leaf spring rear end. This will not fit our cars without having the spring pads and panhard arm brackets welded on. Also what about the torque arm?

I didn't hear you say you were using this diff as parts for your housing it sounds like you are planning on using this diff in your car. Also it is the right length hub to hub? our diffs are pretty wide... Hope all works out on this one for ya.

Massey

 

Oh, I know the housing won't work. There's no seats for the coil springs and no place to bolt the suspension bar. I'm going to swap the gears and axels for the ones out of the S10. My housing is still in awesome shape.