Hi all.
Yesterday I was out at a buddies and one thing led to another and I ended up talked into doing a burnout on an old piece of asphalt driveway.
I've had the car for about 8 months or so, and have yet to light them up once.
It's a bone stock 90 RS with the 305 TBI and the 700R4. ( I don't know what rear it has, nor the ratios, or I'd have it in my details)

I thought it would only smoke one of em, but I'll be danged if it didn't light both of em' up!

I've read around on here quite a bit lately and have seen several members mentioning that their's will "lock up" like it should. Does this mean the rear end will lock up and act as a positive traction rear?

 

Positive traction rears don't "lock up", even though people who don't understand them use that terminaology. THe only kind that behaves like that is the Gov-Lock, which is a somewhat different animal; and wouldn't have come in your car anyway. Although it's easy enough for someone to put one in there.

Limited slip (aka posi etc.) consists of sets of clutches that force the axles to rotate at the same speed as the carrier, unless BOTH wheels have sufficient traction to overcome the friction of the clutches. Most LS rear ends take anywhere fro 50 to 100 ft-lbs to overcome the clutches and force a one-wheel spin. That's enough usually to keep the thing from going into one-wheel meltdown.

The "2 wheel spin" thing is not a reliable "test" for the presence of a limited slip rear.

The ONLY way to know for sure, is to take off the cover and look..

Which it sounds to me like it might be a real good idea to replace, or at least CHECK, the rear end fluid, before abusing the car unnecessarily. While you're catching up on the overdue routine maintenance, make a point of looking at the parts and seeing what they are.

And, make a note of what gear is in it, so we don't see yet another pointless "what gear do I have" post.

Since you have a TBI car, there is probably less than a 1% chance that it was equipped with limited slip from the factory. However, people swap stuff all the time, so that's no "proof" of what's in it now, any more than RPO codes or tage or any of that would be. However, if I was the betting kind, I'd almost be willing to bet you have a regular open diff and 2.73 gears. If that part is still stock of course; which since you've only had the car for about 5% of its total lifetime, is anybody's guess.

 

ive still got a craptastic open rear in my car, haven't upgraded yet.
I can spin both tires from time to time

 

Well, I have an open rear, and only 1 wheel ever spins. I have never gotten both to smoke. But, I have a T5 so the forces are alot different. On an automatic, you build up pressure in the TC untill the force is enough to overcome the brakes. In a car like mine, you dump the clutch and move your foot over to the brake pedal, so it kinda jerks the rear into spinning.

Oh, and your sig is wrong. I have an athlon dual core, not a celeron

 

same here. no celeron, just the athlon dual core. as for your tires.... when you chang the diff fluid and clean it out, you figure out which gears you have by counting the teeth on the ring gear, and counting the teeth on the pinion gear. put the smaller number over the bigger one, convert the fraction, voila. gear ratio.

 

Awesome. I didn't want to ask, I was assuming when I disassembled it, I would find the ratio stamped somewhere, now I know. I appreciate the knowledge guys.

As for the signature...
All of the machine specs are mine. Cpu, load, uptime, all that is my machine. The only thing that pertains to you guys is the last two lines, the IP, browser, and ISP. Those last few things are generated and placed in the signature as you view any page that has my sig on it. I do not have access to that info. It's all server side at www.l33tsig.net . As for my machine, I run their client on it, that polls my system about every ten minutes and uploads the data to l33tsig, and the signature is generated.
You guys see the record uptime? That was done a few weeks ago with a version of linux, that does not use the hard drive of the computer. It runs totally from ram, so it's literally instant everything. No waiting for anything to load, as it's all loaded into RAM when you boot it up. Pretty cool huh.

Once again, thanks for the info guys.

 

no problem. and when i said convert the fraction, I meant convert it to a decimal.