I'm making long term plans for my RS and am a little confused about my differential options. I know the difference between a posi and a full locking rear, but what is the advantage of one over the other? I assume that a posi would be more streetable, but I've been told that posi units often fail at the track. I was thinking about getting a PowerTrax locker, but I can probably get a used posi for much less than $400. What would be my best bet? Thanks!

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'91 Camaro RS - TBI 305 - medium garnet - '91-'92 Z28 wheels - leather - all power options (except power seat) - t-tops - Clarion head unit - Pioneer 4way 200watt 6x9s - Rockford Fosgate Punch amp and 2 Fosgate 12" subs - Edelbrock open element w/ K&N filter - Random Technology highflow cat - some free mods, more coming soon...

 

by locker i believe you mean spool, not for the street at all. if you run on the street use a posi rear and if you race use a spool.

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

 

A locker is kind-of between a spool and posi(limited slip). If you get the no-slip powertrax, it is so smooth and quiet that you can't tell it's a locker. The cheaper powertrax locker clicks when you turn corners(closer to 300 dollars). Both are fairly easy to install--the only thing you remove is the spider gears. I've had mine for close to 5 years without any trouble.

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350 with stealth intake, holley carb, 470 lift cam. 700r4 with .5 boost valve, vette servo, tci lock-up kit, B&M megashifter. Richmond 3.73 gears, powertrax locker, timkin bearings, synthetic lube. Custom 3 inch single into 2 2.5 pipes. 1 1/2 drop springs, 1 5/16 solid front sway bar, 1 inch rear bar, custom subframe connectors, custom LCA relocation brackets. Kobel ground FX, currant red metallic paint. Lots of other stuff...
82camaro

 

Yes, I was referring to the PowerTrax locker, not a spool. I've heard nothing but good things about it so far.

 

yea, but how do lockers handle in turns? dangerous?
tj

 

Wow, back from the dead--2 years....A locker unlocks when turning--acting like it's an open diff. Dangerous? I drive mine all the time and I "sense no danger".

 

I'm gonna get one of those powertrax lockers next week (gotta pull the diff cover to see what I got first) Seems the easiest way to lay down 2 black marks

 

so did you get that powertrax last week? how does it handle in the turnes? what do you ahve and how long do you spin the tires for from a dead stop on dry pavement?
thanks,
tj

 

Wow, I had forgotten that I posted this...in 2001!

I still plan on going with the Powertrax but I don't wanna use my 2.72 rear so I gotta get new gears too hopefully soon!

 

Yep, got it in Friday It's weird through the corners at first but you get used to it... If you are light on the throttle, it stays unlocked through the corner but as soon as you give it a little, the front of the car lurches to the outside of the corner for a split second. Minor correction of the steering and you're fine. Hehehe how long a marks.... well, I did a small one today about 25 foot before having to let off for a speed bump. I think it's just more fun getting sideways taking a corner anyway

 

what do you think your car is pushign for hp/tq...

trying to figure out if i could even chirp them with mine if i had a 1990 305 tbi all stock other than k & n drop in and a 3" flowmaster cat back... along with 2.73 gears.. lol what do you think.....

 

I'm just guessing maybe 240 hp 285 ft tq. Really want to get on a chassis dyno to find out for sure. Last night I did my first dounuts after putting in the locker and probably spun'em for over 100 feet when I straightened out the car hehehe. I had to lift off a bit cause they wouldn't stop spinning