i have a 81 2nd gen camaro, has a 350 with all the works on it. have a turbo 350 trans and a stock rearend. i want to turn my limited slip into a posi so i can lite them up on the weekends and do some drifting videos. this is a weekend car so im not worried about tire wear.

what kinda of rearend gears should i get and what size for my application with the engine and trans setup? idk a thing about gm rearends so if i could get some guidance what to look for or how to identify what i have to get some help here.

Thanks Guys  

Positraction or "posi" is GM's option name for a limited slip differential. Not sure exactly what you are looking for. If you have the standard rear end carrier, you may want to consider a locker. They can be installed without having the clearances in the rear end set up. You also mention a ratio change, that will require set up  

He's right above, if you change gears you'll need to have the pinion lash reset to make sure the mesh between the pinion and the ring gear are correct.

I'd go to Auburn Gear and get everything you need to upgrade the rear in your Camaro. Then find a good shop in your area to install everything so you know it's done right.  

i agree witht the above guys.  you should have a 7.5inch 10 bolt rear end. but if you are not experianced with doing this type of work then you cannot CANNOT do it.  it is very rpecise work and has to be exzact when stting the ring and pinion.  the carrier is something you can do yourself i would go with the locker but if you are paying someone to do the gears you mind as well get them to do the carrier too.  

whats the differance between posi traction or posi when it comes to gm's limited slip?  i want to be able to drop the pedal and be able to spin both tires at any given time, weather in turning a corner at 15 mph or from a dead stop. i plan on doing some drifting with this car as well. what are my options? whats a good gear ratio for if i am going to want to do some traveling on the weekends a few hundred miles and low end torque?  

Your question really doesn't make any sense.  The difference between posi traction and posi is that you left a word off the second time you wrote it.  There is no difference other than you abbreviated.

A good gear –

I have 4:11 gears in my camaro but I like to go to the strip.  I drive it in town on the weekends and it hardly ever sees cruising speeds over 35 mph although I do get on the highway every now and then and do 70 for a few miles.

I would not go any lower than 3:43's but you could go with 3:73's if you want.  That is your best choices 3:43's will give you the best gas mileage and the lowest rpm's at cruising speeds and 4:11's will break your neck when you push the gas to the floor.  I prefer the latter but that doesn't mean you do.  

so 3:73 gears are right in between 4:11 and 3:43 gears?

and refering to the posi or posi trac i was talking about what the other guy said above in this thread.

i dont want to put the pedal to the floor and have a one wheel wonder. exspecialy when i am turning a corner or just starting from a dead stop going strait.

i can only get it to lock up if i do a break torque.

What do i have to do to get my rearend to do what i want it to? all sugestions are greatly appreciated.

thanks  

your question has already been answered.are you just looking for someone to talk to?  you need a detoit locker.  and i already told you three choices of gears and the type of performance they will give you.  nobody can really give you anymor eof an answer than what the 3 people that have already responded to you have given.  

Tell Santa you want one of these
Leave the gears alone and see if it suits your needs. Count the teeth while you are in there so you know what ratio you have, then decide if you want to change.  

that is just some other companies version of a detroit locker.  already been said

also let me add that leaving your gears alone might not be a bad idea because you probably already have a 3:43 gear in there.  so you should find out what your stock rear gears are.  before you mess with them and if you are not going with an overdrive tranny then you probably don't want anything over 3:43's anyway or else you will be turning ;like 4000 rpm's in 3rd doing like 60mph. so you have to take into consideration what kind of transmission you are running in order to decide what gears to use.

so what transmission are you running?

i just ralised that you already said you are using a 350 trans so you have 3 gearas and no overdrive so you don't want anyhigher than 3:73's and that is going to give you some high rpm's at cruising speeds.

i have 4:11's with a 700 trans and i do like 3200 rpm's at 65-70 mph.  and you don't have any gear even close to my overdrive.  the only trans with a better over drive than the 700 is the corvette double overdrive 6 speed.  so if i was you i would find out what rear gears are already in the car adn if they are 3:43's i would just leave it alone. if they are 3:23's then you have to decide if you wat to spend $200.00 just to go up one gear size and i seriously doubt you have 2:73's in it.  you either have 3:23's or 3:43's stock.  i would just get the detroit locker and stick with the gears you have like the last guy said.


also it would be a huge pain in the ass to try to count your gear teeth while the ring is in the rear and greasy as hell.  i don't really think that is a feasable idea.  not worth the hassle.  you can call a chevy dealer parts counter and ask them what gear ratios were offered in your year if you give them the vin# they can probably tell you exzactly what tyhe stock ratio was.  then you just have to figure if someone changed them or not.  

thanks guys, i decided to go with a 4;11 posi from a older nova for $100 guy is puting in a ford 9in. he cut me a deal. thanks again