Differential for 1991 Mercury Grand Marquis
No.
Part # / Description / Price
Price
N/A
Slip Yoke 
Ford
Ford Description: Cougar/Thunderbird. 8 cylinder. All models. Without trailer tow pkg. LTD/Marquis. 6 cylinder. Without 3.27 axle.
N/A
Slip Yoke Ford
Ford Description: All models. With trailer tow pkg. 8.8 ring gear. 3.8l. With supercharger. Mustang. 5.0l. Manual trans. GT.
2
Seal FORD MOTORCRAFT OEM Ford
Ford Description: F67Z1S177ACASTERLING AXLE 7.5 AND 8.8 R/G.SEAL, REAR WHEEL BEARING OIL INNER
MSRP $28.20
$18.15
MSRP $28.20
$18.15
2
Seal Ford
Ford Description: All models. Bronco II, Ranger. Aerostar. Ford axle. Town Car. 7.5 ring gear. Explorer. Cougar, Thunderbird. 7 1/2 gear. Mark VII.
11
Ring & Pinion Ford
Ford Description: Mustang. 7.5 axle. 3.08 ratio. Ranger. 7.5 ring gear. 3.08 ratio. Mark VII. 3.08 ratio.
11
Ring & Pinion Ford
Ford Description: All models. 7.5 ring gear. 2.73 ratio. With 7.5 ring gear. 2.73 ratio. Mustang. 7.5 axle. 2.73 ratio. Mark VII. 2.73 ratio.
11
Ring & Pinion Ford
Ford Description: All models. 8.5 & 8.8 ring gear. 3.55 ratio. Explorer, Mountaineer. 3.55 ratio. With 7.5 ring gear. 3.27 ratio. Aerostar. Ford axle. Non-locking. 7.5 ring gear. 3.27 ratio. Mustang. 7.5 axle. 3.27 ratio. Mark VII. 3.27 ratio.
11
Ring & Pinion Ford
Ford Description: All models. 8.5 & 8.8 ring gear. 2.73 ratio. With 8.8 ring gear. 2.73 ratio. Town Car. 2.73 ratio. E150 vans. 2.73 ratio. Mustang. 8.8 axle. 2.73 ratio. Ranger. 7.5 ring gear. 2.73 ratio.
11
Ring & Pinion Ford
Ford Description: Town Car. 3.27 ratio. Aerostar. Ford axle. Explorer, Mountaineer. Mustang. 8.8 axle. 3.27 ratio. 8.8 ring gear. 3.27 ratio. Locking. 3.27 ratio. Mark VIII. 3.27 ratio.
12
MSRP $17.00
$11.93
14
Differential Case Ford
Ford Description: All models. 8.5 & 8.8 gear. Without traction lock. Aerostar. Non-locking. 8.8 ring gear. Without locking.
15
Side Gear Washer Ford
Ford Description: All models. 8.5 & 8.8 gear. F150. Town Car. Without limited slip. Without 7.5 gear. F250 pick-up. Mustang. 8.8 axle. Mark VIII. Ls6, ls8. Thunderbird.
MSRP $346.52
$237.04
MSRP $346.52
$237.04
15
Side Gear Washer Ford
Ford Description: 7.5 ring gear. All models. 7.5 gear. With 7.5 gear. Mustang. 7.5 axle. Mark VII.
MSRP $35.92
$25.24
MSRP $35.92
$25.24
16
Side Gear Ford
Ford Notes: Includes: Pinion Gear.
Description: All models. Town Car. Without locking. Without traction-lock. Without 7.5 gear. Ranger. 8.8 ring gear. Non-locking. Ls6, ls8. Thunderbird.
18
Pinion Washer Ford
Ford Description: 7.5 ring gear. All models. 7.5 gear. With 7.5 gear. Without limited slip. Mustang. Mark VII.
MSRP $13.20
$9.48
MSRP $13.20
$9.48
18
Pinion Washer Ford
Ford Description: All models. 8.5 & 8.8 gear. F150. Town Car. Without 7.5 gear. F250 pick-up. Ls6, ls8. Pinion gear washers.
MSRP $62.72
$45.12
MSRP $62.72
$45.12
20
Lock Pin Ford
Ford Description: All models. Town Car. 7.5 ring gear. Aerostar. Ls6, ls8. Mustang. Base, GT. Mark VII.
MSRP $9.42
$6.81
MSRP $9.42
$6.81
21
Shaft Lock Ford
Ford Description: All models. Bronco II, Ranger. Town Car. 7.5 ring gear. Without traction lock. Aerostar. Explorer. Mustang. Base, GT. Mark VII.
MSRP $18.88
$13.60
MSRP $18.88
$13.60
No.
Part # / Description / Price
Price
5
MSRP $17.00
$11.93
No.
Part # / Description / Price
Price
15
Ring & Pinion Ford
Ford Description: Mustang. 7.5 axle. 3.08 ratio. Ranger. 7.5 ring gear. 3.08 ratio. Mark VII. 3.08 ratio.