S
TECHNICAL SERVICE BULLETIN 23-2335
Chatter/Shudder During Low Speed Turning Events 26 October
Model:
Ford Engine: 1.5L EcoBoost - Vehicles built on or before 30-Nov-2022
2021-2023 Bronco Sport| Engine: 2.0L EcoBoost - Vehicles built on or before 28-Feb-2022
2020-2022 Escape Engine: 1.5L EcoBoost
Engine: 2.0L EcoBoost
Built on or before 30-Apr-2022
Lincoin Engine: 2.0L EcoBoost
2020-2022 Corsair Engine: 2.3L EcoBoost
Built on or before 30-Apr-2022
Issue: Some 2021-2023 Bronco Sport vehicles equipped with a 1.5L engine built on or before 30-Nov-2022, 2021-
2023 Bronco Sport vehicles equipped with a 2.0L engine built on or before 28-Feb-2022 or 2020-2022
Escape/Corsair non-plug in hybrid electric vehicle (PHEV) vehicles built on or before 30-Apr-2022 may exhibit a
chatter/shudder during low speed turning events. This may be due to contamination of the rear drive unit (RDU) fluid
through the RDU vent hose. To correct the condition, follow the Service Procedure to replace the RDU vent hose.
Action: Follow the Service Procedure to correct the condition on vehicles that meet all of the following criteria:
* One of the following vehicles:
- 2021-2023 Bronco Sport vehicles equipped with a 1.5L engine built on or before 30-Nov-2022
- 2021-2023 Bronco Sport vehicles equipped with a 2.0L engine built on or before 28-Feb-2022
- 2020-2022 Escape/Corsair (non-PHEV) vehicles built on or before 30-Apr-2022
+ Exhibits a chatter/shudder during low speed turning events
Parts
One Of The Following Sealants (Step 17)
TA-2-B As Needed | Motorcraft® Seam Sealer
Obtain Locally As Needed | 3M 08308
Obtain Locally LORD Fusor 803DTM
Parts
Bronco Sport 2.0L
Service Part : ane Unit of Piece
XY-75W-QL As Motorcraft® SAE 75W Disconnect Rear Drive Unit
Needed | Fluid
Parts
Bronco Sport 1.5L / All Escape

Service Part Quantit Description Unit of Piece
Number uantity Pp Issue Quantity
XY-75W-QL As Motorcraft® SAE 75W Disconnect Rear Drive Unit
Needed | Fluid
Parts
Corsair
Service Part Quantit Description Unit of Piece
Number uantity escriptio! Issue Quantity
XY-75W-QL As Motorcraft® SAE 75W Disconnect Rear Drive Unit
Needed | Fluid
Quantity refers to the amount of the service part number required to repair the vehicle.
Unit of Issue refers to the number of individual pieces included in a service part number package.
Piece Quantity refers to the total number of individual pieces required to repair the vehicle.
As Needed indicates the amount of the part may vary and/or is not a whole number. Parts can be billed out as non-
whole numbers, including less than 1.
Special Tool(s)
Hand Stud Rivet Setter Kit
Metric Item #AST1455
Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty
(SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not
altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified
using the OASIS part coverage tool.
Labor Times
att Operation a
2021-2022 Escape 1.5L/2.0L: Replace The RDU Vent Hose Following The Service 232335A 0.9
Procedure (Do Not Use With Any Other Labor Operations) Hrs.
2021-2022 Corsair: 2.0L/2.3L: Replace The RDU Vent Hose Following The Service 232335B 0.9
Procedure (Do Not Use With Any Other Labor Operations) Hrs.
2021-2022 Bronco Sport 2.0L, 2021-2023 Bronco Sport 1.5L: Replace The RDU Vent Hose 232335C 0.9
Following The Service Procedure (Do Not Use With Any Other Labor Operations) Hrs.
Repair/Claim Coding
Condition Code:
Service Procedure
1. Remove the right rear fender splash shield retaining pin and fold back the right rear fender splash shield to inspect
the RDU vent hose. (Figures 1-2)

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2. Inspect the RDU vent hose mounted behind the right rear fender splash shield. Is the vehicle equipped with the
updated RDU vent hose as shown in the image with the green check mark in Figure 3?
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(1). Yes - this article does not apply. Continue with normal diagnosis.
(2). No - proceed to Step 3.

3. Remove the right rear wheel. Refer to Workshop Manual (WSM), Section 204-04A.

4. Remove the retainers and screws from the right rear fender splash shield shown in Figures 4-6. Lower and fold the
right rear fender splash shield in front of the brake caliper to access the RDU vent hose and upper section of the
wheel well.

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5. Disconnect the RDU vent hose retainers. (Figure 7)
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6. Remove the rear differential vent hose and ground strap bolt from the RDU and position aside. (Figure 8)
Figure 8 - Bronco Sport 1.5L/Escape/Corsair shown, Bronco Sport 2.0L similar
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7. Remove the ground strap bolt from the body. (Figure 9)
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9. Position the new RDU vent hose and ground strap assembly and attach the hose retainers. (Figures 7 and 10)

10. Install the bolt to attach the ground strap to the body. Tighten to 12 Nm (106 |b.in). (Figure 9)

11. Install the new RDU vent hose onto the RDU. (Figure 8)

12. Install the bolt to secure ground cable onto RDU. Tighten to 12 Nm (106 Ib.in). (Figure 8)

13. Using the new retainer at the end of the new RDU vent hose, position the hose vertically so the form of the hose
follows the inner arch of the wheel well. Use a tool or a marker to mark the location on the body to drill a hole.
(Figure 11)

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14. Position the RDU vent hose aside.
A CAUTION: A depth stopper on the drill bit is necessary to prevent damage to the interior trim.
15. Using a 10 mm (25/64 in.) drill bit with a depth stopper that leaves only 7 mm (1/4 in.) of the end of the drill bit
exposed, drill a hole at the location marked in Step 13.
16. Deburr and clean the hole drilled in Step 15. Temporarily dry fit the stud rivet in the body to make sure the stud
rivet is properly seated, then remove the stud rivet.
17. Apply a generous amount of sealant to the body side of the stud rivet. (Figure 12)
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A CAUTION: Failure to properly seal the stud rivet could lead to water entry into the passenger area.
18. Insert the stud rivet and secure using the stud rivet tool.
19. Spread the excess sealant around the rivet collar as well as the base of the stud to confirm adequate sealing.

(Figure 13)
NOTE: It is not necessary to wait for the sealant to dry before reassembly.
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20. Attach the hose retainer to the new stud.
21. Reassemble the right rear fender splash shield and secure using the retainers and locations shown in Figures 4-

6.

22. Install the right rear wheel. Refer to WSM, Section 204-04A.

23. Drain and fill the RDU. Refer to WSM, Section 205-02A.

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NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and
equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information
that could assist in proper vehicle service. The procedures should not be performed by “do-it-yourselfers". Do not assume that a condition
described affects your car or truck. Contact a Ford or Lincoln dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy
and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article.
The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supersede
this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.