freydaddy, just another chiming in with some helpful advice.
A full spool changes things drastically because you now have a single purpose tool in the rear end rather than a multi-tasking differential.
Do a bit of research online concerning the geometry at work when you have two different lines being traversed while connected.
The easy description: When turning, the inside tire travels less distance than the outside tire.
This means the two tires, connected via the spool, must figure out a way to travel different distances, at different speeds, while being radially connected by the axel shaft.....something MUST give.
What gives, hopefully, is the tires traction ability....meaning the tires must skid in some manner.
The inside tire scuffs around the smaller circumference while the outer tire skids and tries to keep up with the radius turning speed of the inside tire.
ALL of this causes every portion of the suspension and rear driveline to bind as it works to overcome the traction limits of the tires as they skid.
From the driver seat you WILL feel, and hear, many things you have not yet experienced.
Be specially aware of on and off throttle chassis/steering inputs as you go around cloverleafs at speed.
It will basically feel like your car is being shoved by the hand of god as it shifts during the turn....often in an unsettling manner because the car tries to either go straight, or the unloading and loading of the suspension "grabs" and then slips, and then "grabs" again, over and over until the curve is complete.
EVERY portion of this is elevated if the road surface has any type of traction limiters, (rain, sand, snow, dirt, leaves, mayflies, etc)
If you have a BIG parking lot available I strongly suggest you drive around that empty lot fiddling with turning radiuses, throttle inputs, braking inputs, and other things just to get used to driving with a spool and sticky tires.
Once you have a full understanding about what is going on and what is normal then you can drive around with knowledge and confidence.......But don't think for a second you can toss the keys to another driver and hope they do okay.
A spool is a dedicated tool that can not be duplicated any other way....but like most dedicated tools, they have their limitations and place.
I don't think the street is a good place for a spool equipped driver style car.
If you are taking a dedicated drag car to a special show once or twice per year then it is okay.
But if this is your "daily" cruiser a spool gives rise to many plausible troubles that other differential options cover in a far better manner.
A Detroit Locker is one better example.
They come with their own set of "instructions" but they are MUCH better on the street than a full spool.
Anyway, know what you installed and understand the "contract" you signed when installing the spool in your street driven toy.
Big power, skinny front tires, wrinkle wall slicks and a spool make for some exciting driving......just hope and prey it does not rain....ANYWHERE you will be driving that particular night of street racing, otherwise you may find yourself driving home at a comically slow speed just so you don't crash while driving straight down the highway....The on ramps are really fun.
I, ummm, read about this in a magazine once....Yeah, that's the ticket, in a magazine.
