K-4491 should be installed on transmissions built prior to July 29th, 2019 serial number Z0123456 whenever a transmission is removed. Contact the Roadranger Call Center at 1-800-826-4357 for warranty guidelines. K-4491 will be added to new production transmissions targeted to be built 07/19/2021.
Key off.
Set vehicle parking brake and chock wheels.
Loosen the 4 Linear Clutch Actuator (LCA) cap screws 1-2 turns each with a T45 Torx.
Note: Residual air pressure in the LCA cylinder exhausts between the LCA and Mechatronic Transmission Module (MTM) housing when the cap screws are loosened.
Tighten the 4 LCA to MTM T45 cap screws and torque to 23-27 Nm (17-21 lb-ft).
Locate the Oil Drain Plug on the back of the rear housing.
Place a suitable container under the Oil Drain Plug.
Note: Original oil is not to be reused.
Remove the Oil Drain Plug with a 6 mm hex key and drain the oil.
Inspect Oil Drain Plug and O-ring for damage. If damaged, replace the Oil Drain Plug; O-ring is serviced with plug.
Install the Oil Drain Plug (6 mm) and torque to 24.5-29.5 Nm (18-22 lb-ft).
Disconnect negative battery cable.
Refer to OEM guidelines for transmission removal.
Remove the Release Bearing by sliding the bearing off the Input Shaft Cover.
Pull to free the lower Clutch Release Yoke socket from the lower pivot on the clutch housing.
Pull to free the upper Clutch Release Yoke socket from the Linear Clutch Actuator (LCA) rod end.
Remove the 6 Upper Countershaft Cover 13 mm cap screws and remove cover.The original Upper Countershaft Cover and Front Seal are not to be reused.
Clean any residual oil from the Upper Countershaft Bearing outer diameter using Non-Chlorinated Brake Cleaner.
Install the Upper Countershaft Cover Countershaft Bearing O-ring (10004217) onto the Upper Counter- shaft Bearing.
Note: O-ring may fall out of position after installation. Ensure to clean any residual oil from the bearing and roll the O-ring on to the bearing using the tips of your fingers pushing on the inner diameter of the O-ring. If necessary, apply a small amount of transmission assembly lube at the 3, 6, 9 and 12 o'clock positions to the outer diameter of the bearing.
Clean the sealing surfaces on the clutch housing and the new Upper Countershaft Cover.
Note: The new Upper Countershaft Cover has a chamfer that is required for the bearing O-ring.
Install new Countershaft Cover front seal (10001048) into the groove of the new Upper Countershaft Cover (10004215) until fully seated
Install the new Upper Countershaft Cover and six 13 mm cap screws to the clutch housing and torque to 21-25 Nm (16-19 lb-ft) in a criss-cross pattern.
Depress and hold collar on air line fitting and disconnect the air line from the Inertia Brake Cover.
Remove the 6 Inertia Brake Cover 13 mm cap screws.
Remove the Inertia Brake Cover and Housing as an assembly. The original Inertia Brake Housing and seals are not to be reused.
Ensure the Inertia Brake Piston Pin and Return Spring remain in the Lower Countershaft.
Remove the clutch pack from the Inertia Brake Housing.
Remove the 2 wear guides from the Inertia Brake Housing.
Clean sealing surfaces on the clutch housing and the new Inertia Brake Housing.
Note: The new Inertia Brake Housing (10004216) has a chamfer on the Clutch Housing side that is required for the bearing O-ring.
Insert the new Inertia Brake Rear Seal (10001049) into the groove on the rear of the new Inertia Brake Housing (10004216) until fully seated.
Insert the new Inertia Brake Housing Front Seal (10001048) into the new Inertia Brake Housing (10004216) until fully seated.
Install the 2 original Wear Guides into the new Inertia Brake Housing (10004216).
Install the original inertia brake clutch pack in the order shown below:
Note: Steel Discs align with Wear Guides. Friction Discs spline to the lower countershaft.
Place Inertia Brake Cover and Piston on the Housing. Align the bolt holes.
Clean any residual oil from the Lower Countershaft Bearing outer diameter using Non-Chlorinated Brake Cleaner.
Install the Inertia Brake Housing Countershaft Bearing O-ring (10004217) onto the Lower Countershaft Bearing.
Note: O-ring may fall out of position after installation. Ensure to clean any residual oil from the bearing and roll the O-ring on to the bearing using the tips of your fingers pushing on the inner diameter of the O-ring. If necessary, apply a small amount of transmission assembly lube at the 3, 6, 9 and 12 o'clock positions to the outer diameter of the bearing.
Install the Inertia Brake Cover and the new Housing as an assembly over the Lower Countershaft, rotate the assembly to align the Friction Discs to the Lower Countershaft splines and seat the assembly to the clutch housing.
While holding the Inertia Brake Housing to the clutch housing, remove the Inertia Brake Cover.
If removed, install the Return Spring into the Lower Countershaft.
If removed, install the Piston Pin into the Lower Countershaft.
Install the Inertia Brake Cover onto the housing.
Install the six 13 mm cap screws and torque to 21-25 Nm (16-19 lb-ft) in a criss-cross pattern.
Insert air line in push-to-connect fitting on the Inertia Brake Cover.
Loosen the 4 LCA cap screws 1-2 turns each with a T45 Torx.
Note: Residual air pressure in the LCA cylinder exhausts between the LCA and MTM housing when the cap screws are loosened.
Remove the 4 LCA cap screws
Remove the LCA from the MTM.
Note: LCA piston rod end is seated in the release yoke socket; pull to release rod end from socket.
Inspect the plastic socket insert in the release yoke through the LCA opening using a flashlight to verify none of the fingers are missing or damaged.
Note: If the plastic insert is damaged, replace the release yoke assembly.
Inspect LCA to determine next steps, reference images below:
Locked in Reset Position | Not Locked in Reset Position |
Place LCA push rod on a clean, flat surface. Tightly grasp LCA housing with both hands and push down on push rod to lock LCA into the reset position.
Inspect LCA to determine next steps, reference images below:
Note: If LCA cannot be locked into the reset position, replace LCA.
Locked in Reset Position | Not Locked in Reset Position |
Clean all sealing surfaces on the MTM and LCA with a lint free cloth.
Insert the LCA into the MTM.
Install 4 LCA T45 cap screws and torque to 23-28 Nm (17-21 lb-ft) in a criss-cross pattern.
Install the upper Release Yoke socket over the rod end of the Linear Clutch Actuator (LCA) and press until attached.
Install the lower Release Yoke socket over the lower pivot on the clutch housing and press until attached.
Slide the Release Bearing over the input shaft and into the Release Yoke.
Refer to OEM guidelines for transmission installation.
Connect negative battery cable.
Remove the Oil Fill Plug with a 6 mm hex key.
Place a suitable container under the Oil Check Plug and remove the Oil Check Plug with a 6 mm hex key.
Fill the transmission with PS-386 lube until a small amount of oil runs out of the Oil Check Plug hole.
Note: Fill capacity is approximately 7.5-8.5 liters (16-18 pints) depending on the transmission angle.
Inspect Oil Check Plug and O-ring for damage. If damaged, replace the Oil Check Plug; O-ring is serviced with plug.
Install the Oil Check Plug (6 mm) and torque to 24.5-29.5 Nm (18-22 lb-ft).
Inspect Oil Fill Plug and O-ring for damage. If damaged, replace the Oil Fill Plug; O-ring is serviced with plug.
Install the Oil Fill Plug (6 mm) and torque to 24.5-29.5 Nm (18-22 lb-ft).
To ensure proper operation, the TCM, clutch, MTM and transmission require a Clutch and Rail Calibration. Calibrations are automatically initiated when:
Note: Vehicle display may indicate a flashing “CC” and “F” in gear display.
Set vehicle parking brake and chock wheels.
Key on with engine running.
Allow vehicle air pressure to build to governor cut-off.
Note: Clutch and Rail Calibrations automatically initiate when vehicle air pressure reaches approximately 100 psi.
Ensure “N” (Neutral) is selected and engine is running. Wait approximately 2 minutes for calibrations to complete.
Key off and wait 1 minute.
Key on with engine off.
Connect ServiceRanger.
Go to “Fault Codes”.
Disconnect ServiceRanger.
Key off.
Inspect transmission for a PTO.