Transmission Identification?

I have a 2000 Crown Vic P71 ex-police, the tranny won't shift into 3rd or OD, so I was told by the mechanic that it needs a new trans. I am looking for a used one, I went to www.car-part.com (http://www.car-part.com) the problem is it lists 3 different transmissions and I don't know how to figure out which one my car has.
Please help.
Jim

look on your tranny pan if not there count how many bolts going threw tranny pan..also have you tried your vin number to see if they can match it up?
good luck....

You have a 4R70W transmission.

When I asked the Mechanic, he said it's AODE trans and gave me a bunch of #'s off it. But when I ask salvage yards they say I need to know the ID and it's one of these:

Police, ID XW7P-BA
Police, ID XW7P-CA
Police, ID YW7P-AA
Police, ID XW7P-DA
I copy & pasted this from the car-part.com website. This is the same code the salvage yards ask me for, but I can't seem to find it anywhere.:frown: Maybe they are all the same?

Anyone familiar with these ID #'s?

It could be worse. I went to car-parts and for my 2003 I get 16 different options.

I did find out which trans ID my car has, I called thev Ford dealer and they looked it up from the VIN.

Here is a link to a list of years and tranny I.D.'s from 1992 up

http://www.p71interceptor.com/tranny/modelnumbers/crownvic/index.html