How to remove and install the upper control arm on a Ford Expedition with air suspension?

This procedure applies to both 2WD and 4WD models. If the vehicle is equipped with air suspension, turn off the air suspension system. The switch is located in the area of the right kick panel. Measure the height of the center of the hub to the ground before proceeding. Loosen the wheel lug nuts, raise the front of the vehicle and support it securely on jackstands. Remove the wheel. Position a floor jack, with a wood block on the jack head (to act as a cushion), under the lower control arm in the area between the spring seat and the balljoint. Raise the jack slightly to take the spring pressure off the upper control arm. Mark the position of the upper control arm camber adjustment cam. If the vehicle is equipped with a 4-wheel anti-lock brake system (4WABS), remove the bracket bolt for the wheel speed sensor wire and place the sensor wire out of harm's way. To disconnect the upper control arm from the steering knuckle, remove the cotter pin from the balljoint castle nut, loosen the nut a few turns (don't remove it), install a small puller and break the balljoint loose from the knuckle. Now remove the nut. Remove the upper control arm pivot bolts and nuts. Remove the control arm. Inspect the pivot bolt bushings for wear. If the bushings are worn, you'll have to replace the control arm. Inspect the upper balljoint seal. If it's leaking, replace the control arm. The balljoint is not serviceable. Position the arm in the frame brackets and install new bolts and nuts. They must be installed with their heads facing toward each other. Make sure the marks you made prior to disassembly are aligned, then tighten, but don't torque, the pivot bolt nuts. Attach the balljoint to the steering knuckle and tighten the ballstud nut. Reattach the 4WABS front brake anti-lock sensor wire bracket and tighten the bolt securely. Install the wheel and lug nuts, then lower the vehicle. Tighten the lug nuts. Tighten the upper arm pivot bolt nuts, front nut first. Reactivate the air suspension system, if equipped.

How to remove and install the lower control arm on Ford Expedition?

First of all, the front suspension has independent wheels connected to the frame with steering knuckles, ball joints, and control arms. 2WD models use coil springs and shock absorbers, while 4WD models use shocks and torsion bars. Coil springs are positioned between the frame and lower control arms on 1997-2002 models, while later models have shock absorber/coil spring assemblies. A stabilizer bar reduces vehicle roll and connects to the frame and control arms. The steering linkage includes a Pitman arm, idler arm, center link, and tie-rod assemblies. The steering knuckles differ between 2WD and 4WD models. The rear suspension on trucks has leaf springs, shock absorbers, and U-bolts attaching the axle to the springs. Rubber bushings secure the front ends of the springs to the frame, and shackles connect the rear ends to the frame.

How to replace the Coil Springs,Control Arm,Shock Absorber,Sway Bar and Trailing Arm on Ford Expedition?

If the vehicle is equipped with air suspension, turn off the air suspension system. Loosen the wheel lug nuts, then raise and support the rear of the vehicle. Remove the rear wheels. To remove the brake drum, spray penetration oil around the flange and studs if it's stuck due to corrosion, or remove the plug in the access hole and back off the adjuster wheel if it's locked onto the shoes due to excessive wear. Clean the brake assembly before disassembling it, then remove various components such as the secondary brake shoe retracting spring, primary shoe retracing spring, brake shoe adjusting lever, cable, guide plate, and parking brake link and spring. For shock/spring assembly replacement, position a jack under the steering knuckle, remove the nuts securing the top of the assembly, and lower the jack. Remove the lower control arm-to-spring bolt and nut, then remove the assembly. If replacing only the shock, compress the spring and remove the shock rod nut. For lower control arm replacement, disconnect the lower link nut from the Sway Bar Kit, remove the nut and bolt securing the shock/spring assembly, and remove the front and rear bushing nuts and bolts. For upper control arm replacement, remove the parking brake cable bracket bolt, upper arm-to-wheel knuckle bolt, and upper arm bushing nuts and bolts. For toe link rod removal, remove the inner end nut and knuckle nut, and remove the rod. For trailing arms removal on later models, remove the nuts and bolts securing the arms to the knuckle and frame, then install new bolts and nuts loosely. To remove the Sway Bar Kit, disconnect the end links, remove the rear suspension stone shields, and remove the Sway Bar Kit bracket-to-frame bolts. Install new nuts on the links and bracket bolts.

Genuine Ford Expedition Control Arm

Suspension Arm

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62 Control Arms found

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Ford Expedition Arm Assembly - Front Suspension
Part Number: 6L1Z-3084-AA
$73.83 MSRP: $146.73
You Save: $72.90 (50%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Arm Assy - Front Suspension; Upper Control Arm
- Manufacturer Note: RH Upper
- Position: Passenger Side Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004-2006 Ford Expedition | 8 Cyl 4.6L Romeo SOHC EFI, 8 Cyl 5.4L, 8 Cyl 5.4L Modular SOHC | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Arm Assembly - Front Suspension
Part Number: JL1Z-3085-A
$110.93 MSRP: $157.45
You Save: $46.52 (30%)
ADD TO CART
Product Specifications
- Other Name: ARM ASY - FRONT SUSPENSION
- Position: Driver Side
- Replaced by: JL1Z-3085-C
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2019 Ford Expedition | 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Arm Assembly - Front Suspension
Part Number: JL1Z-3084-A
$116.19 MSRP: $164.91
You Save: $48.72 (30%)
ADD TO CART
Product Specifications
- Other Name: ARM ASY - FRONT SUSPENSION
- Position: Passenger Side
- Replaced by: JL1Z-3084-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2019 Ford Expedition | 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Arm Assembly - Front Suspension
Part Number: 2L1Z-3078-AB
$417.34 MSRP: $574.96
You Save: $157.62 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Arm Assy - Front Suspension
- Manufacturer Note: RH Lower
- Position: Passenger Side Lower
- Replaced by: 6L1Z-3078-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2005 Ford Expedition | 8 Cyl 4.6L Romeo SOHC EFI, 8 Cyl 5.4L, 8 Cyl 5.4L Modular SOHC | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Arm Assembly - Front Suspension
Part Number: 9L3Z-3078-A
$167.20 MSRP: $276.36
You Save: $109.16 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Arm Assy - Front Suspension; Lower Control Arm
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2013 Ford Expedition | 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Arm Assembly - Front Suspension
Part Number: 9L3Z-3079-A
$159.50 MSRP: $263.64
You Save: $104.14 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Arm Assy - Front Suspension; Lower Control Arm
- Position: Front
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2013 Ford Expedition | 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Arm Assembly - Front Suspension
Part Number: EL3Z-3084-A
$93.39 MSRP: $154.36
You Save: $60.97 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Arm Assy - Front Suspension
- Manufacturer Note: RH Upper
- Position: Passenger Side Upper
- Replaced by: EL3Z-3084-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2014-2017 Ford Expedition | 6 Cyl 3.5L GTDI, 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Arm Assembly - Front Suspension
Part Number: BL3Z-3085-A
$90.97 MSRP: $150.36
You Save: $59.39 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Arm Assy - Front Suspension
- Manufacturer Note: LH Upper
- Position: Driver Side Upper
- Replaced by: EL3Z-3085-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2010-2013 Ford Expedition | 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Expedition Arm Assembly - Front Suspension
Part Number: BL3Z-3084-A
$93.39 MSRP: $154.36
You Save: $60.97 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Arm Assy - Front Suspension
- Manufacturer Note: RH Upper
- Position: Passenger Side Upper
- Replaced by: EL3Z-3084-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2010-2013 Ford Expedition | 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Expedition Arm Assembly - Front Suspension
Part Number: EL3Z-3085-A
$90.97 MSRP: $150.36
You Save: $59.39 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Arm Assy - Front Suspension
- Manufacturer Note: LH Upper
- Position: Driver Side Upper
- Replaced by: EL3Z-3085-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2014-2017 Ford Expedition | 6 Cyl 3.5L GTDI, 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Expedition Arm Assembly - Front Suspension
Part Number: JL1Z-3085-C
$110.93 MSRP: $157.45
You Save: $46.52 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Upper Control Arm
- Position: Front
- Replaces: FL3Z-3085-A, JL1Z-3085-A, JL1Z-3085-B, MCF-2325, FL3Z-3085-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2023 Ford Expedition | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS, 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Expedition Arm Assembly - Front Suspension
Part Number: JL1Z-3084-B
$116.19 MSRP: $164.91
You Save: $48.72 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Upper Control Arm
- Position: Front
- Replaces: JL1Z-3084-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2023 Ford Expedition | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS, 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition ARM ASY - REAR SUSPENSION
Part Number: 7L1Z-5500-C
$41.91 MSRP: $76.33
You Save: $34.42 (46%)
Ships in 1-2 Business Days
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Product Specifications
- Position: Rear
- Replaces: 7L1Z-5500-B, 7L1Z-5500-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2024 Ford Expedition | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS, 6 Cyl 3.5L GTDI, 8 Cyl 5.4L | 10-Speed Automatic Transmission (10R80), 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 4AT 4R75W, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition ARM ASY - REAR SUSPENSION
Part Number: JL1Z-5500-F
$95.65 MSRP: $139.83
You Save: $44.18 (32%)
ADD TO CART
Product Specifications
- Other Name: Rear Upper Control Arm, Tie Rod, Upper Arm
- Position: Rear
- Replaces: JL1Z-5500-D, JL1Z-5500-A, JL1Z-5500-E
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2024 Ford Expedition | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS, 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Expedition Arm Assembly - Rear Suspension
Part Number: 7L1Z-5500-B
$41.91 MSRP: $76.33
You Save: $34.42 (46%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Front Arm, Upper Control Arm
- Position: Rear
- Replaced by: 7L1Z-5500-C
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2023 Ford Expedition | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
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Ford Expedition Arm Assembly - Front Suspension
Part Number: 6L1Z-3084-BR
$78.49 MSRP: $107.25
You Save: $28.76 (27%)
ADD TO CART
Product Specifications
- Other Name: Arm Assy - Front Suspension
- Manufacturer Note: RH Upper
- Position: Passenger Side Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006 Ford Expedition | 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Expedition ARM ASY - REAR SUSPENSION
Part Number: JL1Z-5500-C
$53.07 MSRP: $105.45
You Save: $52.38 (50%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Trailing Arm
- Position: Rear
- Replaces: JL1Z-5500-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2024 Ford Expedition | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS, 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Expedition Arm Assembly - Front Suspension
Part Number: 7L1Z-3079-A
$138.10 MSRP: $188.70
You Save: $50.60 (27%)
ADD TO CART
Product Specifications
- Other Name: Arm Assy - Front Suspension; Lower Control Arm
- Manufacturer Note: LH Lower
- Position: Driver Side Lower
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2008 Ford Expedition | 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Expedition ARM ASY - FRONT SUSPENSION
Part Number: NL1Z-3085-A
$78.51 MSRP: $156.00
You Save: $77.49 (50%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Upper Control Arm
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2022-2024 Ford Expedition | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
View related parts
Ford Expedition Arm Assy - Rear Suspension
Part Number: JL1Z-5500-A
$95.65 MSRP: $139.83
You Save: $44.18 (32%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: ARM ASY - REAR SUSPENSION
- Position: Rear
- Replaced by: JL1Z-5500-F
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2019 Ford Expedition | 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)

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Ford Expedition Control Arm

The Control Arm in Ford Expedition simply translates the movement of the frame to the wheels and houses other spare parts including; shocks and springs. These arms turn in relation to the road's surface and help the wheels to rotate in a vertical motion. Ford Expedition Control Arms come in different designs and forging materials; the types that are found in more advanced models are cast iron or aluminum. However, common chasis wear items such as bushings and ball joints may sometimes have to be replaced as they are relatively durable. Aluminum and high-strength steel performance control arms are also offered for the for high-speed application or for modified car models. Further, control arm bushings, and hardware are available; that can be either used to replace OE arms or adjust the mounting position for improved alignment.

We provide a wide range of Ford Expedition Control Arm at the best prices possible. If you need Ford Expedition Control Arm, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your door step with a fast delivery service.

Ford Expedition Control Arm Parts Questions & Experts Answers

Arm Assembly - Front Suspension
XL3Z-3084-AA
Q: How to remove and install the upper control arm on a Ford Expedition with air suspension?
A: This procedure applies to both 2WD and 4WD models. If the vehicle is equipped with air suspension, turn off the air suspension system. The switch is located in the area of the right kick panel. Measure the height of the center of the hub to the ground before proceeding. Loosen the wheel lug nuts, raise the front of the vehicle and support it securely on jackstands. Remove the wheel. Position a floor jack, with a wood block on the jack head (to act as a cushion), under the lower control arm in the area between the spring seat and the balljoint. Raise the jack slightly to take the spring pressure off the upper control arm. Mark the position of the upper control arm camber adjustment cam. If the vehicle is equipped with a 4-wheel anti-lock brake system (4WABS), remove the bracket bolt for the wheel speed sensor wire and place the sensor wire out of harm's way. To disconnect the upper control arm from the steering knuckle, remove the cotter pin from the balljoint castle nut, loosen the nut a few turns (don't remove it), install a small puller and break the balljoint loose from the knuckle. Now remove the nut. Remove the upper control arm pivot bolts and nuts. Remove the control arm. Inspect the pivot bolt bushings for wear. If the bushings are worn, you'll have to replace the control arm. Inspect the upper balljoint seal. If it's leaking, replace the control arm. The balljoint is not serviceable. Position the arm in the frame brackets and install new bolts and nuts. They must be installed with their heads facing toward each other. Make sure the marks you made prior to disassembly are aligned, then tighten, but don't torque, the pivot bolt nuts. Attach the balljoint to the steering knuckle and tighten the ballstud nut. Reattach the 4WABS front brake anti-lock sensor wire bracket and tighten the bolt securely. Install the wheel and lug nuts, then lower the vehicle. Tighten the lug nuts. Tighten the upper arm pivot bolt nuts, front nut first. Reactivate the air suspension system, if equipped.
Arm Assembly - Front Suspension
7L1Z-3084-A
Q: How to remove and install the lower control arm on Ford Expedition?
A: First of all, the front suspension has independent wheels connected to the frame with Steering Knuckles, Ball Joints, and control arms. 2WD models use Coil Springs and Shock Absorbers, while 4WD models use shocks and Torsion Bars. Coil springs are positioned between the frame and lower control arms on 1997-2002 models, while later models have shock absorber/coil spring assemblies. A stabilizer bar reduces vehicle roll and connects to the frame and control arms. The steering linkage includes a Pitman arm, idler arm, center link, and tie-rod assemblies. The steering knuckles differ between 2WD and 4WD models. The rear suspension on trucks has leaf springs, shock absorbers, and U-bolts attaching the axle to the springs. Rubber bushings secure the front ends of the springs to the frame, and shackles connect the rear ends to the frame.
Arm Assembly - Front Suspension
6L1Z-3084-AA
Q: How to replace the Coil Springs,Control Arm,Shock Absorber,Sway Bar and Trailing Arm on Ford Expedition?
A: If the vehicle is equipped with air suspension, turn off the air suspension system. Loosen the wheel lug nuts, then raise and support the rear of the vehicle. Remove the rear wheels. To remove the brake drum, spray penetration oil around the flange and studs if it's stuck due to corrosion, or remove the plug in the access hole and back off the adjuster wheel if it's locked onto the shoes due to excessive wear. Clean the brake assembly before disassembling it, then remove various components such as the secondary brake shoe retracting spring, primary shoe retracing spring, brake shoe adjusting lever, cable, guide plate, and parking brake link and spring. For shock/spring assembly replacement, position a jack under the Steering Knuckle, remove the nuts securing the top of the assembly, and lower the jack. Remove the lower control arm-to-spring bolt and nut, then remove the assembly. If replacing only the shock, compress the spring and remove the shock rod nut. For lower control arm replacement, disconnect the lower link nut from the Sway Bar Kit, remove the nut and bolt securing the shock/spring assembly, and remove the front and rear bushing nuts and bolts. For upper control arm replacement, remove the parking brake cable bracket bolt, upper arm-to-wheel knuckle bolt, and upper arm bushing nuts and bolts. For toe link rod removal, remove the inner end nut and knuckle nut, and remove the rod. For trailing arms removal on later models, remove the nuts and bolts securing the arms to the knuckle and frame, then install new bolts and nuts loosely. To remove the Sway Bar Kit, disconnect the end links, remove the rear suspension stone shields, and remove the Sway Bar Kit bracket-to-frame bolts. Install new nuts on the links and bracket bolts.