Subframe Bushing

Replace worn front subframe bushings to restore proper front suspension alignment and reduce vibration on 1994-2007 Dodge Ram 2500 4WD with 5.9L Cummins diesel.

Warnings

Tools required

Parts

• Front subframe bushings (set of 4) × 1 — OEM Mopar or Moog K200822/K200823
• Cotter pins for ball joints × 2 — Use OEM specification

Preparation

1. Park vehicle on level, solid surface and chock rear wheels securely
2. Disconnect negative battery cable to prevent inadvertent airbag deployment
3. Spray all subframe mounting bolts, control arm bolts, and ball joint nuts with penetrating oil and allow to soak overnight if possible
4. Raise front of vehicle and support on jack stands positioned at frame rails behind front axle
5. Remove both front wheels
6. Place hydraulic transmission jack or subframe support under center of front crossmember/subframe
7. Mark steering wheel center position with tape for reference during reassembly

Procedure

1. 1

   Disconnect sway bar links
   Locate sway bar end links connecting sway bar to the front axle on both sides. Use Allen key to hold shaft while loosening and removing upper and lower link nuts. Disconnect both sway bar links completely to allow subframe to drop without sway bar interference.
   Torque spec

   Sway Bar Link61 Nm (45 lb-ft)
2. 2

   Separate ball joints from steering knuckles
   Remove cotter pins from both lower ball joint castle nuts using cotter pin puller. Loosen but do not fully remove ball joint nuts (leave 2-3 threads engaged). Use ball joint separator or pickle fork to break taper between ball joint stud and steering knuckle. Once taper is broken, remove nuts completely and separate ball joints from knuckles on both sides.
   ⚠Leave nut partially threaded to prevent ball joint from violently separating and causing injury when taper breaks.
   Torque spec

   Ball Joint Nut88 Nm (65 lb-ft)
3. 3

   Support steering knuckles and brake assemblies
   With ball joints separated, steering knuckles and brake assemblies will drop. Use wire or bungee cords to support knuckle assemblies from frame to prevent stress on brake hoses and CV axle joints. Ensure no tension is placed on brake lines or ABS sensor wiring.
4. 4

   Remove control arm pivot bolts
   Locate front and rear pivot bolts securing both lower control arms to subframe. These are large bolts passing through control arm bushings. Use breaker bar or impact wrench to remove all four control arm mounting bolts (two bolts per control arm). Allow control arms to hang down while supported by CV axle joints.
   ⚠Control arm bolts are under high preload and may require significant force to break free. Apply additional penetrating oil if necessary.
   Torque spec

   Control Arm Bolts165 Nm (122 lb-ft)
5. 5

   Disconnect shock absorber lower mounts
   Remove lower shock absorber mounting bolts on both sides. This vehicle uses conventional shock absorbers, not struts. Remove the lower shock absorber mounting bolts only. Leave upper mounts connected. Support shocks/struts with wire to prevent them from hanging loose.
   Torque spec

   Strut Bolts115 Nm (85 lb-ft)
6. 6

   Remove subframe mounting bolts
   Locate the four main subframe-to-frame mounting bolts. These are typically positioned at corners of subframe assembly. With transmission jack firmly supporting subframe weight, remove all four mounting bolts slowly. Monitor subframe position constantly as bolts are removed to prevent sudden dropping. Subframe/crossmember is heavy and components may be under load. Ensure adequate support before removing final mounting bolt.
   ⚠️Subframe weighs over 100 lbs and is under spring tension from torsion bars on some models. Ensure adequate support before removing final mounting bolt.
7. 7

   Lower subframe assembly
   Carefully lower transmission jack to drop subframe 6-8 inches. Lower slowly and check for any interfering components such as brake lines, wiring harnesses, or steering linkage. Lower slowly and check for any interfering components such as brake lines, wiring harnesses, or steering linkage. Full subframe removal is not necessary for bushing replacement.
8. 8

   Remove old subframe bushings
   With subframe lowered and accessible, locate the four subframe mounting bushings in frame mounting points. Use bushing removal tool, press arbors, or appropriate combination of sockets and C-clamps to press old bushings out of their mounting locations. Work carefully to avoid damaging frame mounting holes. Note orientation and depth of original bushings before removal.
   ⚠Bushings may be severely deteriorated or bonded to frame. Heating with propane torch can help, but keep flame away from brake lines and wiring.
9. 9

   Clean mounting points and prepare for installation
   Thoroughly clean all four bushing mounting locations using wire brush to remove rust, old rubber debris, and corrosion. Inspect frame mounting holes for elongation, cracking, or damage. Apply light coat of dish soap solution or approved bushing installation lubricant to new bushing outer surfaces and mounting holes to ease installation.
10. 10

    Install new subframe bushings
    Using bushing installation tool or shop press with appropriate spacers, carefully press new bushings into frame mounting locations. Ensure bushings are oriented correctly with any voids or index marks matching original positions. Press bushings until fully seated and flush with frame surface. Verify all four bushings are properly installed before proceeding.
    ⚠Do not use excessive force or incorrect tools as this can damage new bushings or deform frame mounting holes. Bushings should press in with steady, even pressure.
11. 11

    Raise and align subframe
    Using transmission jack, carefully raise subframe back into position aligning mounting bolt holes with new bushings. This may require manipulation and minor shifting to achieve proper alignment. Thread all four subframe mounting bolts by hand first to ensure proper alignment before tightening any bolts. Do not fully tighten at this stage.
12. 12

    Reconnect control arms
    Align both lower control arms with their pivot mounting points on subframe. Install front and rear control arm pivot bolts through bushings but do not torque yet - leave slightly loose. Control arm bushings must be torqued with vehicle weight on wheels per manufacturer specification to prevent bushing bind.
    Torque spec

    Control Arm Bolts165 Nm (122 lb-ft)
13. 13

    Reconnect ball joints and shock mounts
    Position steering knuckles back onto ball joint studs on both sides. Install ball joint castle nuts and torque to manufacturer specification. Advance the nut (never back off) to align the slot with the cotter pin hole. Install new cotter pins through castle nut slots and ball joint stud holes, bending pins to secure. Reconnect lower shock absorber or strut mounting bolts on both sides.
    Torque spec

    Ball Joint Nut88 Nm (65 lb-ft)

    Strut Bolts115 Nm (85 lb-ft)
14. 14

    Reconnect sway bar links
    Install sway bar end links connecting sway bar to lower control arms on both sides. Use Allen key to hold link shaft while installing and tightening upper and lower nuts to specification.
    Torque spec

    Sway Bar Link61 Nm (45 lb-ft)
15. 15

    Final torque sequence
    Reinstall wheels and torque lug nuts in star pattern. Lower vehicle so full weight is on wheels but keep jack positioned for safety. Torque all four subframe mounting bolts to specification. Then torque control arm pivot bolts with vehicle weight on suspension. Remove jack, reconnect battery, and verify steering wheel is still centered.
    Torque spec

    Wheel Lug Nuts183 Nm (135 lb-ft)

    Control Arm Bolts165 Nm (122 lb-ft)

Reassembly

1. All torque specifications must be followed exactly, especially control arm bolts which require vehicle weight on wheels
2. New cotter pins must be installed on all ball joint nuts - never reuse old cotter pins
3. Verify all suspension components are properly reconnected and no tools or parts are left under vehicle

Verification

• Test drive vehicle at low speed in safe area and verify no unusual noises, vibrations, or steering pull
• Perform front end alignment at qualified shop immediately after subframe bushing replacement to restore proper suspension geometry
• Recheck all subframe and control arm bolt torque after 50-100 miles of driving
• Verify steering wheel is centered when driving straight - if not centered, alignment is required

More procedures for this vehicle