RCA-38-23-001-1: Inadequate Halfshaft Spline
Interference
Rivian is initiating a customer satisfaction campaign for some model year 2022 R1S and R1T vehicles that may
have been built with inadequate press fit force between the halfshaft splines and the wheel hubs. In some
instances, this condition may result in a loss of torque of the halfshaft bolt and subsequent noise and/or
separation of the bolt and wheel center cap. Without this bolt there may be additional movement of the
components and/or noise but there will be no resulting changes in the performance of the vehicle. Rivian will
replace the halfshaft bolts and torque them to a higher specification to improve the press fit force and bolt
retention. In addition, washers will be installed on the halfshafts to reduce potential noise. Rivian is launching
this campaign for customer satisfaction and to ensure the quality of Rivian vehicles.
Document Type

Customer Satisfaction Campaign
Bulletin

Date

April 10, 2023

Affected Region(s)

USA

Affected Model(s)

R1T, R1S

Model Year(s)

2022

Approximate Build Dates

August 2021 - May 2022

Refer to Open Containments in ServiceOS to
determine if this document applies to a specific
vehicle.
Vehicle System

38 - Front Drive Unit

Minimum Service Location

Mobile

Required Parts
Part Number

Quantity Engineering Name

Service Name/Notes

PT00753512-B

2

TING WASHER; FRONT HALFSHAFT

PT00753511-C

2

TING WASHER; REAR HALFSHAFT

One of the following:
PT00856494-A

As
needed

Molykote M-77

PT00856493-A

As
needed

Molykote Anti-Seize

Molykote 1000

Attention: The parts listed in this table are only for unique steps that are called out in this bulletin.
Some sections of this bulletin might refer to Service Manual procedures which require additional parts.
Always review the bulletin and all potentially related Service Manual procedures before ordering parts
and beginning work.

Required Special Tools:
Tool Number

Tool name

TSN01096-300-A

Ting Washer Installation Tool

RCA-38-23-001-1: Inadequate Halfshaft Spline Interference, Page 1

Attention: The special tools listed in this table are only for unique steps that are called out in this
bulletin. Some sections of this bulletin might refer to Service Manual procedures which require
additional special tools. Always review the bulletin and all potentially related Service Manual
procedures before beginning work.

Front Halfshafts
1. Remove: Knuckle, Front, LH (refer to service manual procedure 181020011).
2. Using a nylon mesh scuff pad: Clean the highlighted area(s).

3. Apply grease to the highlighted area(s).

4. Position the washer in the "PRE-BEND" side of the front washer sleeve.

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5. Push the pre-bend tool into the sleeve to bend the washer tabs. Continue pressing until the tabs do not
bend any further.

Tip: If necessary: Use a vise or C-clamp to apply pressure to the pre-bend tool.
6. Position the outer sleeve onto the halfshaft. Make sure that the side of the sleeve labeled "SHAFT SIDE"
points toward the vehicle.

7. Position the washer in the "INSTALL" side of the front washer sleeve. Make sure that the bent tabs point
toward the inside of the tool.

8. Install the front washer sleeve into the outer sleeve. Make sure that the side of the tool labeled
"INSTALL" points toward the vehicle.

9. Push on the front washer sleeve to fully seat the washer onto the halfshaft. If necessary: Use a mallet.

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10. Remove the special tools. Make sure that the washer is fully seated onto the halfshaft. If the washer is
not fully seated, repeat steps 6 - 9.

11. Repeat the steps in this section on the opposite side of the vehicle.
12. Continue to the Rear Halfshafts section.

Rear Halfshafts
1. Remove: Knuckle, Rear, LH (refer to service manual procedure 183225010).
Note: It is not necessary to remove the hub from the knuckle.
2. Using the rear washer sleeve: Repeat steps 2-10 of the previous section on the rear halfshaft.
3. Repeat the steps in this section on the opposite side of the vehicle.
4. Reinstall all components that were removed for access and replace all non-reusable components. Refer
to the service manual procedures referenced in this document for additional component reusability
information and torque specifications.

Labor Codes
Labor Code

Description

RCA382300100

RCA-38-23-001 not applicable

RCA382300101

Install washers on 4 halfshafts

Contact ServiceDocumentFeedback@rivian.com
regarding labor codes and document content.

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