M/T - ZF HD M5OD Bump/Clunk/Click Noises

90ford05

^ NOISE - BUMP/CLUNK/CLICK - ZF HEAVY DUTY M50D TRANSMISSION

^ 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.

Figure 3:

4. Strike the punch with a hammer. Make sure that the shoulder of the retaining nut is contacting the bottom of the groove, Figure 3.

CAUTION: WHEN STAKING THE NUT, MAKE SURE THE LOCKING SHOULDER OF THE NUT AND THE GROOVE OF THE OUTPUT SHAFT ARE THE ONLY AREAS USED IN THIS STAKING OPERATION. IF THE NUT IS STRUCK IN ANY OTHER AREA, THE TORQUE WILL BE LOST AND THE NUT MAY COME LOOSE IN SERVICE.

PART NUMBER PART NAME CLASS

E7TZ-7045-A Output Flange Retaining Nut B

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage, Powertrain Warranty Coverage
OPERATION DESCRIPTION TIME
900509A Install & Stake Retaining 0.4 Hr.
Nut
DEALER CODING
BASIC PART NO. CONDITION CODE
7045 33
OASIS CODES: 5500, 5950, 5970, 7100, 7113