my guess is its a typo, or error.

but if you want to know the ratio here is one way to do it.
1. Jack up both rear wheels off the ground and chock the front tires (for
safety).

2. Place your car in neutral and place a small dot on the aft end of the
drive shaft.

3. Now place a dot on the tire as well. Have someone turn the tire one
revolution while you are under the car watching the dot on the rear of the
drive shaft. Count the number of turns it make and use the chart below to
determine the gear ratio you have.

2-3/4 turns equals 2.73's
if it turns more than 3 times its the 3.27

hope that helps

M = 2.73

E = 3.27

That is from the 1996 factory shop manual.  (Probable that your '97 is the
same)

congrats on your ride

I ordered my 97 GT  with a 3.27 rear end, the sticker reads:

   AXLE
    LE

It has a manual trans, if that matters.

You got me looking at my door tag after this post and I noticed mine list BM
as the axle code.  Anyone have any ideas what that one means?