Dakota 2WD V6-239 3.9L (1987)
Drive Sprocket: Customer Interest
Transfer Case - High Effort Shifting From 2-H to 4-H
Models
1985-1987 "W" & "AW" Trucks With NP208 Transfer Case & "N" Body 4 x 4 With NP207 Transfer Case
Subject
High Shift Effort When Shifting From 2-High to 4-High
Index
TRANSMISSION
Date
August 17, 1987
No..
21-15-87 (C10-21)
P-2869
SYMPTOM/CONDITION
High shift effort or total block out while shifting into 4-High (four-wheel drive transfer case). Condition occurs during cold weather operation while
shifting the transfer case into 4-High from the 2-High mode.
DIAGNOSIS
With vehicle cold (below +30~F), shift transfer case from 2-High into 4-High with the vehicle stationary. It may be necessary to move vehicle slightly
forward or rearward to engage front axle.
If the transfer case does not shift with the vehicle stationary, check external shift linkage for proper adjustment (see appropriate service manual for
transfer case shift linkage adjustment procedure).
With vehicle still cold, attempt to shift from 2-High to 4-High at approximately 25 mph. While shifting, apply a constant force to the transfer case shift
lever, not a quick pull. This will allow the synchronizer time to get the front propshaft up to speed. With cold front axle lubricant, the vehicle may
require high effort for an extended time, or will not shift.
Warm front axle lubricant by operating vehicle in 4-High mode for approximately 10 miles. Shift transfer case from 2-High to 4-High several times.
Allow time between shifts to insure synchronizer is out of the 4-High mode before shifting.
If vehicle exhibits high shifting effort in cold weather operation (below +30~F), but has reasonable effort and consistency after vehicle is warm, perform
the front axle lubricant fill procedure as outlined later in this bulletin.
If vehicle requires high shifting effort and shifts inconsistently after the front axle lubricant is warm, the following transfer case parts might require
replacement, in addition to the front axle lubricant change.
PARTS REQUIRED
Transfer Case - NP208 ("W" and "AW" Truck)
1
Synchronizer Assembly
PN 4329516
1
Drive Sprocket Assembly
PN 4329527
Transfer Case - NP207 (N5 Dakota 4 x 4)
1
Synchronizer Assembly
PN 4446457
1
Drive Sprocket Assembly
PN 4446453
Front Axle
Mopar High Performance Synthetic
PN 4467707
