my 87 camaro does the really annoying 1 wheel peel on any surface.. dry or wet. whenever i floor it only one wheel spins. i dont know very much about differentials but mine has 10 bolts and the rear end has drum brakes. so what causes the 1 wheel peel? and how can i stop it?

 

The "one wheel peel" that you are experiencing is caused by what is known as an open differential, to put it very simply you have a "peg-leg" rear end because only one of the wheels is getting power to it. In a posi-traction rear end power is first applied to one wheel and if it starts to spin will transfer power to the other wheel as well to stop the wheel spin. Below is an excerpt that explains how an open differential works:
In an automobile and other wheeled vehicles, a differential is a device, usually consisting of gears, for supplying equal torque to the driving wheels, even as they rotate at different speeds.
In some vehicles such as karts, torque is simply applied evenly to all driving wheels using a simple driveshaft. This works well enough when travelling in a straight line, but when changing direction the outer wheel needs to travel farther than the inner wheel. Hence, the simple solution results in the inner wheel spinning. For general road use, such a method would result in too much damage to both the tire and road surface. Differentials are typically composed of a gear mechanism in which a ring gear receives input power, which is transferred to two side gears by means of usually two opposing central pinion gears on a common shaft. The pinion gear(s) are mounted to a cage which is affixed to the ring gear. When the ring gear and cage rotate, the pinion gears drive the side gears; the pinion gears are free to rotate about their own axis when either of the side gears meets resistance.
In a motor vehicle, the two side gears may be used to transfer power to the left and right wheels. When the vehicle turns a corner, or one of the wheels encounters resistance, the pinion gears rotate around the side with the most resistance; this rotation drives the other side gear with additional speed.
The most basic differential described above, known as an open differential, suffers from one important problem, however. In an automobile, if one wheel begins to slip while the other maintains traction, the slipping wheel will receive most of the power. This means that if one wheel is spinning on ice while the other is still in contact with the pavement, acceleration of the driveshaft will only cause the slipping wheel to spin faster and very little power will reach the wheel with good traction. Similarly, if one wheel is lifted off the ground, nearly all the power will go to the wheel that is off the ground; not a hopeful prospect for off-road vehicles. Such a loss of traction is sometimes called "diffing out."
Differential mechanisms possess two degrees of freedom (DOF), and the state of the mechanism depends on two constraints. In a vehicle, the first constraint is the motor, and the second is the frictional kinematic chain between the two wheels and the ground. When the two wheels slip on the ground, the second constraint becomes weaker or disappears. The differential also becomes undetermined and transmits less or no power. For control and recovery of the second constraint, various mechanisms are used.
One solution to this problem is the limited slip differential (LSD), one of the most common of which is the clutch-type LSD. With this differential, each of the side gears has a clutch which limits the speed difference between the two wheels. Another solution is the locking differential, which employs a mechanism for allowing the pinion gear(s) to be locked, causing both wheels to turn at the same speed regardless of which has more traction; this is equivalent to removing the differential entirely.
A four-wheel-drive vehicle will have at least two differentials (one for each pair of wheels) and possibly a center differential to apportion power between the front and rear axles. Vehicles without a center differential should not be driven on dry, paved roads in all wheel drive mode, as small differences in rotational speed between the front and rear of the vehicle cause a torque to be applied across the transmission. This phenomenon is known as "wind-up" and can cause damage to the transmission. On loose surfaces these differences are absorbed by the slippage of the road surface.

 

How's that for an answer