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Preview Solution CBR-2299-1
Battery Electric Vehicle (BEV) - Vehicle
Will Not "Start", Limited Speed,
Instrument Cluster Showing Neutral
After Gear Selected
Published August 11, 2023

Valid For
Mack LR Electric, Volvo VNR Electric vehicles built for model year 2021 to current.

Solution
Some BEV trucks may be subject to one or more of the symptoms:
Vehicle Turns On but won’t start
Vehicle will not go into any gear
Cluster and Gear Selector display show neutral after a gear is selected, but the
vehicle does select and move Forward/Reverse
Truck is limited to first gear when Forward is selected
Speed limited to ~25 MPH (~40 KPH)
Low Power
Truck will not charge
It is possible that the Selector Unit bushings and/or the Bores/Cylinders in the Compact
Compound Bi-Directional Actuator are not adequately lubricated.

Materials Required:
• Super Lube 93003 O-ring Silicone Grease (pictured below)

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Repair
►IMPORTANT◄
The vehicle's compressed air system
must be drained before proceeding
with the procedure below.

A. Lubricate all of the components in the steps below using the above
silicone grease and the linked document here.
1. Ensure the vehicle's air system is drained completely
2. Review the supplementary steps for the Extension Valve Unit in Part B
below. Photographs are needed in addition to procedures in the document.
3. Lubricate all of the transmission components described in the document above.
Bushings and bores should be lubricated first.
O-rings and seals should then be lubricated and assembled.
All pistons should be lubricated last.

B. Lubricate the Electrical Valve Unit (EVU) assembly and related
components: Supplementary Instructions for use with document
1. Remove the EVU.
2. Remove the Shift Detent.

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3. Disassemble the Selector Unit. The Shift Rod and Fork should move back and forth
about ¾” (20mm).
The detent places a side load on the Shift Rod
4. Examine the Detent point and matching internal 1-N-2 geometry on the Shift Fork
Yoke through the Detent access hole.
4.1. Photograph these components. Make the photos as clear and well-lit as
possible. (Add light through the EVU sensor hole for photo if needed).
5. Check: Does the Detent Ball Bearing Roll?

6. Lubricate the Selector Unit, especially the following Critical areas. If any parts show
excessive wear, replace as needed.
Front Bushing

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Leave the Bushing in Main case.
Pull the Rod to the rear and lube bushing from the rear.
Push/pull the rod to work lube into front bushing.

Rear Bushing in the Selector Unit Rear Cover: especially the selector rod
machined notch to the bushing area.
Photograph this component. Make the photos as clear and well-lit as
possible.
Inner Cylinder Bore
Outer Cylinder Bore
AllO-rings and Seals

7. Lubricate the Detent and matching internal 1-N-2 geometry on the Shift Fork Yoke
Detent Geometry, (through the Detent access hole).

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8. Apply House Air to the Air Port holes to cycle the Shifter Back and Forth once the
Selector Unit is assembled.
9. With the Shift Fork in Forward position:
9.1. Examine the EVU Plunger and matching internal geometry on the Shift Fork
Yoke Bevel Geometry, (through the Plunger access hole).
9.2. Photograph these components. Make the photos as clear and well-lit
as possible.
9.3. Lubricate the components.
9.4. Reinstall the EVU.
10. Calibrate the Shift Forks using the Resolver Function ONLY (this is essential for
engineering review).
11. Place the photos of the rebuild in an e-Service case and send the case to the
eMobility Team.

Related links and attachments
Transmission Control Cylinder Overhaul Modified R2

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