With everyone having diff noises on explorers..I thought this may be helpful determining what kind of axle you have.

Ranger
Axle Code Description Ratio
72 6.75�� 3.08C
74 6.75�� 3.45C
82 7.5�� 3.08C
84 7.5�� 3.45C
86 7.5�� 3.73C
87 7.5�� 4.10C
89 7.5�� 4.10C(�f92-�f98)4.56C(�f99-�f02)
91 8.8�� 3.27C
92 8.8�� 3.08C
95 8.8�� 3.55C
96 8.8�� 3.73C
97 8.8�� 4.10C
98 8.8�� 4.56C
F4 7.5�� 3.45L
F5 7.5�� 3.55L
F6 7.5�� 3.73L
F7 7.5�� 4.10L
KA Electric Vehicle Electric Vehicle
R5 8.8�� 3.55L
R6 8.8�� 3.73L
R7 8.8�� 4.10L
R8 8.8�� 4.56L


Explorer
Axle Code Description Ratio
41 8.8�� 3.27C
42 8.8�� 4.10C
43 8.8�� 3.08C
44 8.8�� 3.73C
45 8.8�� 3.55C
46 8.8�� 3.73C
D1 8.8�� 3.27L
D2 8.8�� 4.10L
D4 8.8�� 3.73L
D5 8.8�� 3.55L

Table Notes

L - Limited Slip Differential
C - Conventional (Open) Differential

 

that should help a lot of forum members.

thanks.