F 350 2WD Pickup V8-7.3L DSL (1988)
Output Yoke: All Technical Service Bulletins
M/T - ZF HD M5OD Bump/Clunk/Click Noises
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NOISE - BUMP/CLUNK/CLICK - ZF HEAVY DUTY M50D TRANSMISSION
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TRANSMISSION - ZF HEAVY DUTY M50D-LEAKS LUBRICANT
Article No. 90-5-9
LIGHT TRUCK:
1987-90 F-250, F-350
ISSUE:
A "bumping/clunking" noise or a "clicking" sound on torque reversal or transmission lubricant leakage may be caused by a loose output
flange retaining nut.
ACTION:
Install a new output flange retaining nut. Refer to the following procedure for service details.
Figure 1
1. Install a new output flange retaining nut (E7TZ-7045-A) on the output shaft, Figure 1.
CAUTION:
DO NOT REUSE THE OUTPUT FLANGE RETAINING NUT AFTER ANY SERVICING OF THE TRANSMISSION. ALWAYS
REPLACE IT WITH A NEW ONE.
2. Tighten the nut to 184 lb.ft. (250 N-m).
Figure 2
3. Position a 3/16" (4.76 mm) punch on the locking shoulder of the retaining nut over the groove of the output shaft, Figure 2.
