I differential works when opisite tires on an axle turn at different rates (ie. turning a corner the outside tire turns faster then the inside tire). a posi rear end locks up when one tire increases speed suddenly while to other is stationary or turning very slow. If your tires are different sizes from side to side then the differential gears ( spider gears) are turning all the time and will burn up as they are not desined to turn all the time and at high speeds. If you have smaller times then the diff wil lock up sooner and if they are much larger then factory it may not lock up soon enough.
One new and one wore tire can destroy the posi Trac.
most commonly the right side tire is the traction tire unless it is a posi-trac rear end. then both tires are main traction tires. the easiest way to tell is lift one tire off the ground leave the vehicle in neutral and if the tire rotates there is not a posi.
More than likely it does, to check, jack the back of the car up and put the car in neutral and spin a rear tire by hand and if both wheels spin in the same direction you have a posi.
{| ! Front Tire Size | P195/65R15 ! Rear Tire Size | P195/65R15 ! Spare Tire Size | T125/70D15 |}
Raise the rear tires off ground. Spin 1 tire while watching other rear wheel, if both rear wheels spin in the same direction it is a posi-trac rear.
A John Deere 2040 had a rear tire size of 13.6-28
tire size for benz 240 c
"There are two options that were installed. One and most likely yours, a 3.27 non locking diff (not posi) and the other was a 3.55 with locking diff (posi). Easy way to tell. Punch it if one tire spins it the 3.27 and if both spin it's the 3.55." That's not really true. The 3.27 was available in both posi and open diff. Nearly all P71 models have the posi unit, and a huge majority of them have the 3.27. Best way to test whether it's posi.... jack the rear end up and put the tranny in neutral. Spin one tire. If the opposite tire spins in the same direction, it's posi. If it spins in the opposite, it's open. 3.27 vs 3.55 would just be a matter of calculating engine RPM vs road speed.
Tire Size (front): P185/65R15-86H Tire Size (rear): P185/65R15-86H
Never mix tire sizes. Run the same size tire on both sides. You can run one size on the front and a different size on the rear but never on the same axle.
P195/70R14 would be the stock tire size for the front, rear and spare tire.
The recommended tire size for both front and rear is P195/65R16