Mack 2019 LR Vehicles: Steering Transfer Case Oil Risk
Mack recalls 2019-2020 LR trucks with potential steering transfer case oil shortage causing lock-up and crash risk. Owners get free transfer case replacements.
Use caution until it’s fixed
The internal bearings may fail without sufficient lubrication, causing steering lock-up and increasing the risk of a crash.
What happened, in plain English
Mack is recalling certain 2019-2020 LR trucks because their steering transfer case may have too little oil, which can cause steering lock-up and increase crash risk. Owners should contact Mack for free transfer case replacements. Read more at govinfonow.com/recall/1224173-mack-2019-lr-vehicles-steering-transfer-case-oil-risk.
Source Summary by GovInfoNow · govinfonow.com/recall/1224173-mack-2019-lr-vehicles-steering-transfer-case-oil-risk · Updated October 4, 2026 · Official notice: NHTSA #21V293000
Cite this page
“Mack 2019 LR Vehicles: Steering Transfer Case Oil Risk.” GovInfoNow, updated October 4, 2026. https://govinfonow.com/recall/1224173-mack-2019-lr-vehicles-steering-transfer-case-oil-risk. Based on NHTSA recall #21V293000 (https://www.nhtsa.gov/recalls?nhtsaId=21V293000).
Why it’s dangerous
The steering transfer case may have insufficient oil, causing it to lock up when turning. This can lead to loss of steering control and potential crashes if the vehicle is moving.
Who’s affected
Owners of 2019-2020 Mack LR trucks are affected. Drivers using these vehicles without the fix could face steering lock-up during operation.
How to tell if you have this one
Check your 2019-2020 Mack LR truck for the recall. The issue affects vehicles where the transfer case oil level is too low.
- Brand
Mack- Category
Vehicle
What to do — step by step
Contact Mack Customer Service
Call 1-800-866-1177 to schedule a transfer case replacement.
Get Free Transfer Case Replacement
Dealers will replace the transfer case at no cost to you.
What NHTSA says to do
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.
How this recall unfolded
Recall timeline
Owners were mailed letters 16 days after NHTSA received the defect report.
- NHTSA received the defect report
- Owner letters mailed
Dates from the agency record only; steps without a date are left out.
Keep exploring
Where this comes from
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
- Official source: NHTSA Recall #21V293000 (April 26, 2021)
- Plain-language summary written by qwen3:4b on October 4, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
- GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.