Montezumas_vip

Hi, I have a navi and I was wondering if number one, they had the locking rear differential in 99' and what the RPO code for it might be.

I know the new ones do have that option even though its very rare, I'm just curious, thanks :)

Johnny Langton

Here are the axle and trans codes for the 2001 Expedition/Navigator-should be the same for at least '99-'02...maybe even newer models.
JL

19 — 3.55, non-limited slip (Expedition/Navigator).

17 — 3.31, non-limited slip (Expedition/Navigator).

H9 — 3.55, limited slip (Expedition/Navigator).

H7 — 3.31, limited slip (Expedition/Navigator).

H6 — 3.73, limited slip (Expedition/Navigator).


Transmission Codes

U — Automatic 4R70W (Expedition/Navigator).

E — Automatic 4R100 (Expedition/Navigator).

__________________
1997 Thunderbird
4.6L Non-PI/4R70W auto
N/A-3670 lbs
12.28@109.57

2001 Navigator
5.4L 4V/4R100 auto
Stock for now