F 250 2WD Pickup V8-6.9L DSL (1985)
Slip Yoke: All Technical Service Bulletins
Driveline - Clunk/Grunt Noise On Start Up
Article No.
87-22-18
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DRIVELINE - "CLUNK" OR "GRUNT" NOISE FROM DRIVELINE DURING STARTING AND STOPPING
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NOISE - "CLUNK" OR "GRUNT" FROM DRIVELINE DURING STARTING AND STOPPING
LIGHT TRUCK:
1978-87 E-250/350
1981-87 F-150/350, E-150
1983-87 RANGER
1986-87 AEROSTAR
This article is being republished in its entirety to clarify the slip yoke application chart.
ISSUE:
A "clunk" or "grunt" noise from the vehicle driveline during start-up and stopping drive modes may be caused by engine torque preventing the slip yoke
from sliding smoothly on the transmission output shaft splines. During the same drive modes, rear suspension wrap-up overcomes slip yoke-to-output
shaft friction causing sudden slip yoke/driveshaft movement, which results in a "clunk" or "grunt" noise. The affected vehicles are 1978-87 E-250/350
with a C6 transmission; 1981-87 F-150/350 (4x2) with a C6, NPG 435, AOD, TOD, or T18 transmission; 1981-87 E-150 with a C6 or AOD
transmission; 1985-86 F- 150/250 (4x4); 1983-87 Ranger (4x2) and 1986-87 Aerostar.
ACTION:
To correct this, install a new design slip yoke with nickel-plated splines to allow for smooth slip yoke movement. Refer to the appropriate Shop Manual,
Section 15-60 for slip yoke removal and installation procedures. Also, refer to the slip yoke application chart below for the correct service part number.
PART NUMBER
PART NAME
CLASS
E6TZ-4841-D
Slip Yoke
C
E6TZ-4841-E
Slip Yoke
C
E6TZ-4841-F
Slip Yoke
C
E4TZ-4841-G
Slip Yoke
B
E1TZ-4841-D
Slip Yoke
B
D5UZ-4841-C
Slip Yoke
B
OTHER APPLICABLE ARTICLES: Supersedes 86-21-14, 87-17-11
WARRANTY STATUS: Eligible Under Powertrain Coverage
OPERATION: SP872218A
TIME: 0.6 Hr. DLR. CODING: Basic Part No. 4841 - Code: 41
