Countries:

CANADA, MEXICO, UNITED STATES Document ID: IK2300042

Availability:

ISIS, Bus ISIS, NotSIR

Revision:

1

Major System:

ELECTRIC VEHICLE

Created:

7/30/2025

Current Language: English

Last Modified: 8/13/2025

Other Languages: NONE

Author:

Viewed:

Joseph Hampton

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Title : Driveline Vibration w/SPL170
Applies To : 2021 - 2025 International® IC Bus® Electric CE Series

CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
08/13/2025 - Initial Article Release

DESCRIPTION
Models Involved: International® IC Bus® Electric CE Series w/feature 0006DGL built between 6/7/2021 and 6/25/2025. (DRIVELINE SYSTEM {Dana
Spicer} Service Free SPL170, for 4x2/6x2)
Defect Description: Certain International® IC Bus® Electric CE Series school buses may experience road vibration induced by an imbalance in the
driveline. This concern may be corrected by retrofitting to the SPL100 drive line which reduces driveline weight with improved driveline balance
specifications.

SYMPTOMS
Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):
DTC/Light

Description

N/A

N/A

Customer Observations or Concerns:
Perceptible vibration in the cabin of the bus, common at speeds from 45mph to 60+mph. The vibration may be audible and/or felt throughout the cabin of the
bus and may become more prevelant as vehicle speed increases.

SPECIAL TOOLS / SOFTWARE
Tool Description

Tool Number

Comments

Instructions

N/A

SERVICE PARTS INFORMATION
Service Parts for the SPL100 retrofit work will be ordered according to vehicle Rear Axle Feature Coding. SWB Buses built with Feature Code 0014AKT or
0014AKR AXLE, REAR,{Dana Spicer 21060SH} 21,000-lb Capacity will require different components at the differential than LWB Buses built with Feature
Code 0014ERW AXLE, REAR, {Dana Spicer S23-172F} 23,000-lb Capacity. See Below.
Item #

Part Number

1

4110949C91

0014AKT / 0014AKR Kit Description

Quantity
Not
Required

DRIVE SHAFT END YOKE, SPL100 SERIES, 39 SPLINE COUNT, BS YOKE STYLE

1

2

4252904C1

SPACER, MOTOR YOKE

1

3

1685128C91

KIT, U JOINT STRAPS AND BOLTS

2

4

DS127589

NUT, PINION FLANGE, DIFFERENTIAL, M36 X 1.5 (55mm Socket)

1

5

2527114C91

MOTOR YOKE NUT HW-2030 W/ COTTER PIN

1

6

4657334C1

YOKE, SLIP JOINT, SPL100 MOTOR

1

7

410LTJ0760

SHAFT, DRIVE LINE PROP, PROP SHAFT (217" Wheel Base)

1

Item #

Part Number

0014ERW Kit Description

Quantity Required

1

4252904C1

SPACER, MOTOR YOKE

1

2

1685128C91

KIT, U JOINT STRAPS AND BOLTS

2

3

2598104C1

NUT (Axle Yoke Nut)

1

4

2527114C91

MOTOR YOKE NUT HW-2030 W/ COTTER PIN

1

5

4657334C1

YOKE, SLIP JOINT, SPL100 MOTOR

1

6

410LTJ0670

SHAFT, DRIVE LINE PROP, PROP SHAFT (254" & 276" Wheel Bases)

1

7
8

2527001C1
2527002C1

FLANGE, YOKE
FLANGE, COMPANION DRIVE SHAFT

1
1

P/N

DS1

Notes

DS100DS

9
10
11

2527003C1
2527004C1
2527005C1

BOLT, DRIVE SHAFT
WASHER, LOCK
NUT, DRIVE SHAFT

DIAGNOSTIC STEPS
WARNING! To prevent personal injury and / or death, or damage to property, park
vehicle on hard flat surface, turn the vehicle off, set the parking brake, and install
wheel chocks to prevent the vehicle from moving in both directions.
WARNING! To prevent personal injury and / or death, always wear safe eye
protection when performing vehicle maintenance.
WARNING! To prevent personal injury and / or death, NEVER service a high voltage
vehicle without completing high-voltage safety training. Before working on vehicle,
read and obey all High-Voltage Safety and Lock-Out Tag-Out procedures and
information.
WARNING! To prevent personal injury and / or death, wear and use approved highvoltage Personal Protective Equipment (PPE) when near a high-voltage electric
vehicle. Inspect PPE before use. Do not use gloves or other PPE with expired

8
8
8

dates, holes, cracks, or damage. NEVER touch energized orange highvoltage
cables or high-voltage components without wearing approved highvoltage PPE.
WARNING! To prevent personal injury and / or death, read all information in the
Safety Information and High-Voltage Safety sections of the service manual.

Step Action

Decision

DIAGNOSTIC:

Yes. Move to Step 2.

Are the U-Joints properly seated in yokes and are all drive line components properly secured, clean of debris, and
undamaged?

No. Make repairs as needed and
retest for vibration.
#1

Step Action

Decision

DIAGNOSTIC:
#2

Yes. Move to Step 3.
No. Adjust ride height to proper specification and retest for vibration. See IK1400005 - Driveline
Troubleshooting Procedures for additional information.

Has Ride Height been checked and verified to be
within vehicle spec?

NOTE: Refer to IK1400039 - Flat Floor Bus - Ride Height Specification for vehicles with Feature

Step Action

Decision

DIAGNOSTIC:
#3

Yes. Proceed with SPL100 retrofit.

Have drive line angles and runout been checked and
verified to be within vehicle spec?

No. Perform work to adjust driveline angles and/or run out to vehicle specification and retest fo
Driveline Information Center and Troubleshooting Procedures for additional information.

REPAIR STEPS
Refer to Service Manual for Component repair instruction.
For torque values concerning updated components, see tables below for specific component torque values:
0014AKT / 0014AKR Torque Values
1685128C91

KIT, U JOINT STRAPS AND BOLTS

45-60 LB FT (61-81 Nm)

DS127589

NUT, PINION FLANGE, DIFFERENTIAL, M36 X 1.5 (55mm Socket)

575-703 LB FT (779-953 Nm)

2527114C91

MOTOR YOKE NUT HW-2030 W/ COTTER PIN

66-81 LB FT (90-110 Nm)

4737466C91

FLANGE, TRUNNION BRG, SPL100 SPICER W/SLINGER W/ADAPTER

40-48 LB FT (54-65 Nm)

1685128C91

KIT, U JOINT STRAPS AND BOLTS

45-60 LB FT (61-81 Nm)

2598104C1

NUT (Axle Yoke Nut)

800-1000 LB FT (1084-1355 Nm)

0014ERW Torque Values

2527114C91

MOTOR YOKE NUT HW-2030 W/ COTTER PIN

66-81 LB FT (90-110 Nm)

WARRANTY INFORMATION
Warranty Claim Coding:
Refer to the Warranty Coding Manual for Group and Noun Codes.

Standard Repair Time(s):
Refer to the SRT Manual for Repair Times

OTHER RESOURCES
Master Service Information Site

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