D50/Power Ram 50 L4-2300cc 2.3L DSL (1984)
Wheel Hub (Locking): Technical Service Bulletins
Automatic Locking Hubs - Racheting Noise
Models
1984-1985 Dodge Power Ram 50 Pick-Up
Subject
Racheting Noise in Automatic Locking Hubs
Index
FRONT AXLE
Date
November 19, 1984
No.
02-10-84 P-5120-C
SYMPTOM/CONDITION
Racheting noise in automatic locking hubs during low temperature operation or after shifting from "4H" to "2H".
DIAGNOSIS/CORRECTION
Use the attached chart to determine the corrective action necessary.
POLICY:
Information Only
SYMPTOM
RESOLUTION
CAUSE
Noise is generated
Drive the vehicle with the lever
Under low temperature, oil in
after start-up with
in "4H" position for a while to
transfer case gets stiff and
shift lever in "2H"
warm up oil in transfer case
it accordingly rotates front
position under low
and then drive with the lever
drive shaft which causes
temperature.
in "2H" position.
racheting effect* of automatic
free-wheeling hub.
Noise is generated
When shifting "4H" (lock) to
If shifting is done while vehi-
after shift lever is
"2H" (free) position, first
cle is turning, only one side of
changed from "4H"
stop vehicle, change shift
free-wheeling hub will be freed
(lock) "2H" (free)
lever from "4H" to "2H" posi-
resulting in the racheting
position.
tion, and then slowly drive
effect.*
vehicle straight backward for 10 to 20 feet.
*Racheting effect is caused when slide gear and housing gear are not engaged and there is difference of revolution speed between those two gears. Noise
is caused by this revolutional difference.
The racheting of the hubs is not detrimental to the components or operation of the vehicle. The 1985 owners manual will advise the customer of the
condition.
