2019-2020 Mack LR SC0424 Steering Transfer Case

April 26, 2021 NHTSA CAMPAIGN NUMBER: 21V293000

Insufficient Lubrication in Steering Transfer Case

The internal bearings may fail without sufficient lubrication, causing steering lock-up and increasing the risk of a crash.

 

NHTSA Campaign Number: 21V293

Manufacturer Mack Trucks, Inc.

Components STEERING

Potential Number of Units Affected 262

 

Summary

Mack Trucks, Inc. (Mack) is recalling certain 2019-2020 LR vehicles. The steering transfer case may have an insufficient amount of oil.

 

Remedy

Dealers will replace the transfer case, free of charge. Owner notifications letters were mailed on May 12, 2021. Owners may contact Mack customer service at 1-800-866-1177. Mack’s number for this recall is SC0424.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

 

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Date	Number	Release	Page
04.2021	SC0424	01	1(30)

 

Steering Transfer Case

LR

RECALL INFORMATION

(April, 2021)

Mack Trucks, Inc. (Mack) is recalling certain 2018 & 2019 LR model vehicles. The issue is with the steering transfer case (commonly referred to as the miter box), which may have not received the required amount of oil at the supplier’s manufacturing facility. As a result, the internal bearings may fail and cause steering lock-up, which under certain conditions increases the risk of a vehicle crash.

Mack Trucks has not received any complaints or reports of vehicle crashes because of this Safety Recall.

To ensure the safety of these vehicles follow the repair process in this document to inspect the steering transfer case build date and as necessary replace the component.

 

VEHICLES AFFECTED

Certain Mack North America vehicles manufactured between November 28th, 2018 and January 31st, 2019.

 

VEHICLE QUANTITY

There are 276 vehicles affected by this recall (272 U.S., 4 Canada).

 

Parts

NOTE

Parts Listed below are only needed if the Transfer Case requires replacement. The Inspection of the component must be completed prior to ordering parts.

 

Ordering Process

An email is required to order parts list. Email campaign@macktrucks.com and include the following in the body of the email:

• VIN of vehicle being repaired
• Dealer ID number
• Part Numbers
• Campaign Number
• PO number

 

A response will be provided within 2 hrs. during normal business.

Parts List
Part Number	Description	Qty
84726804	Transfer Case	1
25106380	Hexagon Screw	3
25098472	Nut Retainer	3

 

Return

NOTE

Parts are on Mandatory Return.

 

Inspection Instructions

1. Secure the truck for service.

 

2. Position drive wheels in the straight-ahead position.

 

3. Disconnect Battery’s.

 

4. Remove both right and left side grab handles.

 

5. Remove right side upper dash bezel.

 

6. Remove upper dash panel

 

7. Remove two lower transfer case fasteners and loosen the two upper transfer case fasteners.

 

8. Using suitable tool, lift the lower transfer case mounting bracket away from the transfer case enough to see the date code on the transfer case identification tag.

 

9. Using the Date Code on the Transfer Case Identification tag determine if the component requires replacement:

a. If the date code is 11/06/18 the Transfer Case will need to be replaced (example of the identification tag can be seen below). Continue to the Replacement Instruction section of this document below for the continued repair.

b. If the date code is anything other than 11/06/18 the component does NOT require replacement. Reassembled the vehicle for return to service and continue to the Completion Label section of this document.

 

Replacement Instructions

NOTE

The instruction below are for Dual Steer configuration. Left or right side steer vehicle configurations may be able to omit steps that do not apply.

 

1. Park the vehicle on a level surface with the steering wheel in the straight ahead position.

 

2. Apply the parking brake.

 

3. Place the gear lever in neutral.

 

4. Install wheel chocks.

 

5. Disconnect the cable from the battery’s negative terminal.

 

6. Remove the Nuts (1).

 

7. Remove the nuts (2).

 

8. Remove the wiper arms.

Remove the wiper arms.

Risk of serious injury.

Heavy component.

▶Exercise caution when moving the component. Assistance is required.

 

9. Remove the windshields.

 

10. Remove the horn button.

 

11. Remove the nut.

 

13. Remove the screws.

 

14. Remove the bezel.

 

15. Remove the horn button.

 

16. Remove the nut.

 

17. Remove the steering wheel.

 

18. Remove the screws.

 

19. Remove the trim panel.

 

20. Remove the screws.

 

21. Remove the bezel.

 

22. Remove the handle.

 

23. Remove the A-pillar trim panel.

 

24. Remove the handle.

 

25. Remove the A-pillar trim panel.

 

26. Remove the screws.

 

27. Remove the panel.

 

28. Remove the covers.

 

29. Remove the nuts and screws.

 

30. Remove the steering shafts.

 

31. Remove the screws.

 

32. Remove the transfer box.

 

NOTE Parts are on Mandatory Return.

 

33. Position the transfer box.

 

34. Install the screws.

 

35. Torque Tighten the screws.

 

Tightening torque

Transfer box, screw
48 ±8 Nm (35 ±6 lb_f ft)

 

36. Install the steering shafts.

 

Note

Make sure the steering wheel is straight and the front wheels are pointed straight ahead.

 

Note

The pinch bolt must be staggered from left to right.

 

37. Install the screws and nuts.

 

Note

Use new fasteners.

 

38. Torque tighten the nuts.

 

Tightening torque

Steering shaft, nut
85 ±15 Nm (63 ±11 lb_f ft)

 

39. Install the covers.

 

40. Install the panel.

 

41. Install the screws.

 

42. Tighten the screws to torque.

 

Tightening torque

Panel, screw
3.4 ±0.6 Nm (3 ±0.4 lb_f ft)

 

43. Install the A-pillar trim panel.

 

44. Install the handle.

 

45. Install the A-pillar trim panel.

 

46. Install the handle.

 

47. Install the bezel.

 

48. Install the screws.

 

49. Tighten the screws to torque.

 

Tightening torque

Bezel, screw
3 ±0.5 Nm (2 ±0.4 lb_f ft)

 

50. Install the trim panel.

 

51. Install the screws.

 

52. Tighten the screws to torque.

 

Tightening torque

Panel, screw
10 ±1.5 Nm (7 ±1 lb_f ft)

 

53. Install the steering wheel.

 

54. Install the nut.

 

55. Torque tighten the nut.

 

Tightening torque

Steering wheel, nut
68 ±5 Nm (50 ±4 lb_f ft)

 

Note

Hand tighten only.

 

Note

Do not use impact tools.

 

56. Install the horn button.

 

57. Install the screws.

 

58. Tighten the screws to torque.

 

59. Tighten the screws to torque.

 

Tightening torque

Bezel, screw
3 ±0.5 Nm (2 ±0.4 lb_f ft)

 

60. Install the steering wheel.

 

61. Install the nut.

 

62. Torque tighten the nut.

 

Tightening torque

Steering wheel, nut
68 ±5 Nm (50 ±4 lb_f ft)

 

Note

Hand tighten only.

 

Note

Do not use impact tools.

 

63. Install the horn button.

 

WARNING

Risk of serious injury.

Heavy component.

▶Exercise caution when moving the component. Assistance is required.

 

64. Install the windshields.

 

65. Install the wiper arms.

 

66. Install the nuts (1).

 

67. Tighten the nuts to torque.

 

Tightening torque

Wiper arm, nut
10 ±2.4 Nm (7 ±2 lb_f ft)

 

68. Install the nuts (2).

 

69. Tighten the nuts to torque.

 

Tightening torque

Wiper arm, nut
3.9 ±0.5 Nm (3 ±0.4 lb_f ft)

 

70. Connect the battery cable to negative (ground) terminal.

 

71. Remove the wheel chocks.

 

COMPLETION LABEL

NOTE

A campaign completion label (part number 85152363) needs to be installed on truck if not previously installed. To signify the campaign has been completed, use a permanent marker (Such as a Sharpe ®) to write the recall number, completion date (MM/DD/YYY) and dealer code on the label. The label is to be applied to the inside of the passenger door as shown in the illustrations below

 

Label Placement- Cabover Chassis Configuration

Dual steering wheels

Single left side steering wheel REIMBURSEMENT

 

This repair is covered by an authorized Safety Recall Campaign. Reimbursement is obtained through the normal claim handling process.
	UCHP Reimbursement
Claim Type (used only when uploading from the Dealer Business System)	40
Recall Status
Vehicle repaired per instructions	1-Modified per instructions
Labor Codes
Inspection Only 1720-16-09-01 – Campaign, General	0.1 x 15 for total of 1.5 hrs
OR
Inspection and Replacement 1720-16-09-01 – Campaign, General	0.1 x 36 for total of 3.6 hrs
Causal Part	84726804
Authorization Number	C6625

 

Note: Dealers are to perform Safety Recall Campaign on all subject vehicles at no charge to the vehicle owner regardless of mileage, age of vehicle or ownership (original purchaser or subsequent purchasers). Whenever vehicles are subject to a Safety Recall Campaign are brought to your dealership for service, or taken into your dealership vehicle inventory, it is strongly recommended that every effort be made to perform the recall correction before the vehicle is sold or released to the owner.

 

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MACK TRUCKS

RECALL ALERT

 

Subject:	Safety Recall SC0424, Steering Transfer Case (LR)
Recall Number:	SRA-M424
Date:	April 27, 2021
Applicable Markets:	☒U.S. ☒Canada

 

Description

Mack Trucks, Inc. (Mack) is recalling certain 2019 & 2020 LR model vehicles manufactured from November 28, 2018 to January 31, 2019. The issue is with the steering transfer case (commonly referred to as the miter box), which may have not received the required amount of oil at the supplier’s manufacturing facility. As a result, the internal bearings may fail and cause steering lock-up, which under certain conditions increases the risk of a vehicle crash.

 

Mack has not received any reports of vehicle crashes.  Out of an abundance of caution, we are asking customers to park these vehicles until they are inspected and cleared or repaired.

 

The transfer case will be inspected and replaced as needed based on the case’s assembly date code.

 

Model and Model Years Affected

• Certain Mack 2019 & 2020 LR model vehicles

 

Vehicle Quantities

• 276 (4 Canada, 272 US)

 

Dealer Responsibilities

• The National Traffic and Motor Vehicle Safety Act and Canadian Motor Vehicle Safety Act requires dealers to ensure that all new and used vehicles are free of safety defects and comply with all relevant safety standards at the time of delivery to the consumer.
• Dealers should make their personnel aware of the safety recall. In the event that a dealer has a vehicle included in the safety recall in their inventory to be sold, the condition must be corrected before releasing it to a customer.

 

Notification Release Schedule

• Vehicle list will be posted on the Trucks Dealer Portal on April 26, 2021
• Owner notification letters will be released on or before May 7, 2021

 

Contact

If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com.

 

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MACK TRUCKS

RECALL ALERT

Subject:	Safety Recall SC0424, Steering Transfer Case (LR)
Recall Number:	SRA-M424
Date:	April 27, 2021
Applicable Markets:	☒U.S. ☒Canada

 

Description

Mack Trucks, Inc. (Mack) is recalling certain 2019 & 2020 LR model vehicles manufactured from November 28, 2018 to January 31, 2019. The issue is with the steering transfer case (commonly referred to as the miter box), which may have not received the required amount of oil at the supplier’s manufacturing facility. As a result, the internal bearings may fail and cause steering lock-up, which under certain conditions increases the risk of a vehicle crash.

 

Mack has not received any reports of vehicle crashes.  Out of an abundance of caution, we are asking customers to park these vehicles until they are inspected and cleared or repaired.

 

The transfer case will be inspected and replaced as needed based on the case’s assembly date code.

 

Model and Model Years Affected

• Certain Mack 2019 & 2020 LR model vehicles

 

Vehicle Quantities

• 276 (4 Canada, 272 US)

 

Dealer Responsibilities

• The National Traffic and Motor Vehicle Safety Act and Canadian Motor Vehicle Safety Act requires dealers to ensure that all new and used vehicles are free of safety defects and comply with all relevant safety standards at the time of delivery to the consumer.
• Dealers should make their personnel aware of the safety recall. In the event that a dealer has a vehicle included in the safety recall in their inventory to be sold, the condition must be corrected before releasing it to a customer.

 

Notification Release Schedule

• Vehicle list will be posted on the Trucks Dealer Portal on April 26, 2021
• Owner notification letters will be released on or before May 7, 2021

 

Contact

If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com.

 

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2 Affected Products

Vehicle

MAKE	MODEL	YEAR
MACK	LR	2019-2020

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10 Associated Documents

Recall Quarterly Report #1, 2021-2

RCLQRT-21V293-3797.PDF 211.135KB

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ISSUED Owner Notification Letter(Part 577)

RCONL-21V293-9608.pdf 140.503KB

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Remedy Instructions and TSB – Revised to show correct model years and population

RCRIT-21V293-6883.pdf 2252.201KB

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Recall Acknowledgement

RCAK-21V293-5476.pdf 645.434KB

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Manufacturer Notices(to Dealers,etc)

RCMN-21V293-2857.pdf 229.281KB

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Remedy Instructions and TSB

RCRIT-21V293-5777.pdf 2251.091KB

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Defect Notice 573 Report

RCLRPT-21V293-2087.PDF 213.925KB

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Recall 573 Report- AMENDMENT 1

RCLRPT-21V293-8228.PDF 213.925KB

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Recall Quarterly Report #3, 2021-4

RCLQRT-21V293-0269.PDF 211.324KB

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Recall Quarterly Report #2, 2021-3

RCLQRT-21V293-9885.PDF 211.234KB

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Latest Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=21V293&docType=RCL

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Last update on 2025-04-15 / Affiliate links / Images from Amazon Product Advertising API

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