Chevrolet Low Cab Forward 2023 Manual page 130

Symptom
From the transmission
Loud or abnormal
From differential
noises
From the suspension
From the driveshaft
Cause
Insufficient transmission oil
Transmission inner
components faulty
Insufficient differential gear oil Add oil
Differential inner components
faulty
Spring pins, shackles,
or stoppers worn
Poor lubrication in each
component
Splines or bearings worn
Driving and Operating
Corrective Action
Add oil
Lubricate them
129
Reference
See Automatic
Transmission Fluid
0 202
-
See Rear Axle (Gear Oil
Viscosity Chart) 0 216
or
Rear Axle (Oil Level
Check) 0 216
-
-
See Owner Checks and
Services 0 277
-