Complete removal and replacement of the front subframe assembly on a 2014 Ram 2500 4WD with 6.7L Cummins diesel, including disconnection of steering, suspension, and drivetrain components.

Warnings

Tools required

Parts

• Front subframe assembly × 1 — Use OEM specification
• Subframe mounting bolts and hardware kit × 1 — Use OEM specification
• Ball joint castle nuts (if damaged) × 2 — Use OEM specification
• Sway bar link assemblies (if worn) × 2 — Use OEM specification

Fluids

• 75W-90 GL-5 Gear Oil — 1.5 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery cable
3. Apply penetrating oil to all subframe bolts, ball joint nuts, and suspension fasteners at least 30 minutes before starting work
4. Raise vehicle and support on jack stands at frame rails behind front subframe location
5. Remove both front wheels
6. Place drain pan under front differential and drain gear oil completely
7. Mark steering wheel center position with tape for reference during reassembly

Procedure

1. 1

   Disconnect front sway bar links
   Locate sway bar links connecting the sway bar to the lower control arms on both sides. Use an Allen key to hold the link shaft while loosening the lower nuts with a wrench. Remove both sway bar links completely and set aside. Inspect links for wear or damage and replace if necessary.
   Torque spec

   Sway Bar Link Nuts55 Nm (41 lb-ft)
2. 2

   Separate steering linkage from knuckles
   Remove cotter pins from both outer tie rod end castle nuts. Loosen but do not remove the castle nuts. Using a tie rod separator tool, separate both tie rod ends from the steering knuckles. Remove the castle nuts completely once separated. Allow steering linkage to hang freely.
   ⚠Do not strike steering knuckles directly with hammer as this can damage wheel bearings.
3. 3

   Disconnect upper ball joints
   Remove the upper ball joint castle nuts from both sides after removing cotter pins. Use a ball joint separator tool to break the taper between ball joint studs and steering knuckles. Once separated, support the steering knuckle and brake assembly to prevent stress on brake hoses and ABS wiring.
   ⚠Ball joints are under spring tension. Ensure knuckle assembly is controlled during separation.
   Torque spec

   Ball Joint Nut119 Nm (88 lb-ft)
4. 4

   Disconnect lower ball joints
   Remove the lower ball joint castle nuts from both sides after removing cotter pins. Use a ball joint separator to break the taper. Once both upper and lower ball joints are disconnected, the steering knuckle assemblies will be free. Secure knuckles, rotors, and calipers to frame with wire or bungee cords to prevent damage to brake hoses and ABS sensors.
   Torque spec

   Ball Joint Nut119 Nm (88 lb-ft)
5. 5

   Support front axle assembly
   Position a floor jack or transmission jack under the front differential. Raise jack until it just contacts the differential housing and supports the weight. The front axle assembly must remain supported throughout subframe removal to prevent damage to CV axles and differential mounts.
   ⚠️Front axle assembly weighs approximately 300 lbs. Ensure jack is properly positioned and secured.
6. 6

   Disconnect shock absorbers
   Remove the lower shock absorber mounting bolts from both sides where shocks attach to the lower control arms or subframe brackets. Allow shocks to hang from upper mounts. Mark orientation of any shims or spacers for reinstallation.
   Torque spec

   Strut Bolts156 Nm (115 lb-ft)
7. 7

   Disconnect sway bar from subframe
   Remove the sway bar mounting bracket bolts from both sides of the subframe. The sway bar bushings and brackets will come off with the bolts. Allow the sway bar to remain attached to the frame rails above the subframe.
   Torque spec

   Mounting Bolts37 Nm (27 lb-ft)
8. 8

   Remove control arm mounting bolts
   Locate the front and rear control arm pivot bolts on both sides where control arms attach to the subframe. These are large bolts typically requiring 21mm or 24mm sockets. Remove all four control arm mounting bolts (two per side). The control arms will remain attached to the subframe during removal.
   ℹ️These bolts may be extremely tight. Use breaker bar and ensure proper socket engagement to avoid rounding bolt heads.
   Torque spec

   Control Arm Bolts165 Nm (122 lb-ft)
9. 9

   Support subframe with transmission jack
   Position a transmission jack or subframe support fixture under the center of the subframe. Raise jack until it firmly contacts the subframe and takes the weight. Use wood blocks or subframe adapters to distribute load evenly. Ensure jack is stable and centered before proceeding.
   ⚠️Subframe must be securely supported before removing mounting bolts. Ensure jack will not shift during lowering process.
10. 10

    Remove subframe mounting bolts
    Locate the main subframe-to-frame mounting bolts. On 2014 Ram 2500, there are typically 4-6 large mounting bolts securing the subframe to the main frame rails. Remove all subframe mounting bolts while ensuring the transmission jack is securely supporting the assembly. Check for any additional brackets, ground straps, or wiring that may still be attached.
    ⚠Verify all connections are clear before lowering. Check for brake lines, wiring harnesses, and vent hoses.
11. 11

    Lower and remove subframe assembly
    Slowly and carefully lower the transmission jack, bringing the subframe assembly down. Guide the assembly to ensure it clears the front axle, steering components, and frame rails. You may need to adjust the front axle jack position slightly. Once clear of the vehicle, roll the subframe assembly out from under the vehicle. The lower control arms will remain attached to the subframe.
    ⚠️Have a helper guide the subframe during lowering. Watch for pinch points and ensure nothing binds during removal.
12. 12

    Inspect and prepare new subframe
    Inspect the removed subframe for damage and compare with replacement. If reusing control arms or other components, transfer them to the new subframe. Clean all mounting surfaces on the vehicle frame rails with a wire brush. Apply anti-seize compound to new subframe mounting bolt threads. Position the new subframe on the transmission jack and prepare for installation.
    ℹ️Take photos or notes of component positioning before disassembly to ensure correct reassembly orientation.
13. 13

    Install new subframe assembly
    Carefully raise the new subframe assembly into position using the transmission jack. Align subframe mounting holes with frame rail holes. Install all subframe mounting bolts hand-tight first to ensure proper alignment. Once all bolts are started, torque subframe mounting bolts in a cross pattern to manufacturer specifications. Remove transmission jack once all bolts are torqued.
    ℹ️Subframe must be properly aligned before final torque. Check alignment of all bolt holes before torquing.
14. 14

    Reconnect control arms and install mounting bolts
    Install control arm pivot bolts through the subframe bushings on both sides (front and rear bolts for each control arm). Thread bolts in hand-tight only at this stage. Do not torque control arm bolts until vehicle weight is on the wheels to prevent bushing bind.
    ⚠Control arm bolts must be torqued at ride height with vehicle weight on suspension. Torquing at full droop will damage bushings.
    Torque spec

    Control Arm Bolts165 Nm (122 lb-ft)
15. 15

    Reconnect ball joints and steering
    Remove wire supports from steering knuckle assemblies. Reconnect lower ball joints first by positioning knuckles and installing castle nuts. Torque to specification and install new cotter pins. Reconnect upper ball joints in same manner. Reconnect outer tie rod ends to steering knuckles, torque castle nuts to specification, and install new cotter pins.
    Torque spec

    Ball Joint Nut119 Nm (88 lb-ft)
16. 16

    Reconnect shock absorbers and sway bar
    Install shock absorber lower mounting bolts on both sides and torque to specification. Reinstall sway bar mounting brackets and bushings to the subframe, torquing mounting bolts to specification. Reconnect sway bar links to lower control arms, using Allen key to hold shaft while torquing link nuts.
    Torque spec

    Strut Bolts156 Nm (115 lb-ft)

    Mounting Bolts37 Nm (27 lb-ft)

    Sway Bar Link Nuts55 Nm (41 lb-ft)
17. 17

    Refill front differential and final checks
    Refill front differential with 1.5 quarts of 75W-90 GL-5 gear oil through fill plug. Verify oil level at fill hole. Reinstall fill plug. Lower front axle jack and remove. Inspect all connections, fasteners, and components for proper installation. Verify no tools or parts remain under vehicle.
    ℹ️Do not overfill differential. Oil should be level with bottom of fill hole threads.
18. 18

    Install wheels and perform final torque
    Install both front wheels and hand-tighten lug nuts in star pattern. Lower vehicle until tires just contact ground but suspension is not fully loaded. Now torque all control arm pivot bolts to specification with vehicle weight on suspension. Fully lower vehicle and torque wheel lug nuts to specification in star pattern. Reconnect battery negative cable.
    ⚠Control arm bolts must be torqued at ride height. Failure to do so will cause premature bushing failure.
    Torque spec

    Control Arm Bolts165 Nm (122 lb-ft)

    Wheel Lug Nuts183 Nm (135 lb-ft)

Reassembly

1. All torque specifications must be applied to clean, dry threads unless otherwise specified
2. Control arm bolts MUST be torqued with vehicle weight on suspension at ride height
3. New cotter pins must be used on all ball joint and tie rod end castle nuts
4. Verify steering wheel is centered after completing installation

Verification

• Start engine and turn steering wheel lock to lock while stationary to verify no binding or interference
• Check for any fluid leaks from front differential fill and drain plugs
• Perform visual inspection of all fasteners to ensure proper installation and torque
• Test drive vehicle at low speeds in safe area to verify proper operation and no unusual noises
• Schedule four-wheel alignment immediately after repair - vehicle is not safe for highway driving until aligned
• After first 50 miles, re-torque all subframe and suspension fasteners to specification

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