Quick Question, How do I know if I have rear posi-traction? Did any iroc's come with it? Posi-trac is when both wheels spin at the same tiem right? Like I said before I don't know much about the mechanics of cars, only what I have learned on these sites. One more question. What is the advantage of posi-trac?

 

The easiest way to tell is to jack up your car from the rear end and spin the rear tires with your hand. If the other wheel spins in the opposite direction, then you have an open rear end. If they spin in the same direction, then you have posi.

The benefits to posi is of course that both wheels put power to the ground, instead of one. Posi rears are a little worse than an open rear in the rain, but who cares about that.

You can find the gear ratio of your rear end by looking up your car in the tech articles on the page.

 

i believe all IROC's came with posi/limited slip....and some Z-28's it depends on what year...but im pretty sure your's gots posi.....try and find out what gears you have..either 2.73, 3.23, 3.42 ....i still need to find out mine (2.73) ?

 

i want to trade someone my lsd 3:23's for their lsd 2:73's if anyone is interested. lsd= limited slip differential

 

im interested...but why ?

 

Do a search on the transmission and driveline tech board! Tha t question has been asked about a million times on that board! Everything U need to know is there including the answers to your questions and a lot more!!!

 

because i have a th-350 with a 3500 stall and want to get a little better highway speed out of her, plus i dont plan on keeping the 2:73's that long before i get my 9 inch so i just want to try them out for a while, let me know, i can swap them in about 2 1/2 - 3 hours , you buy the fluid

 

I just upgraded my car to posi track and have 2.73's in my stock rear end that is just sitting in the garage. let me know.