Driveshafts - Vibration
^ VIBRATION/NVH - DRIVESHAFTS Article No. 87-5-36^ DRIVESHAFTS - VIBRATION/NVH Supersedes 87-2-28
LIGHT TRUCK 1987 E-150/350, F-150/350
ISSUE: Several driveline changes have occurred at or shortly after Job #1, 1987. The following is a list of the changes.
^ All two (2) piece steel driveshafts are system balanced. These driveshafts may be identified by an engineering base part number 4K145 or a service base part number 4R602.
^ 4" aluminum one (1) piece driveshafts replaced two (2) piece steel driveshafts where possible (production incorporation delayed on some applications).
^ 8.8" high torque rear axles replaced the 9" rear axles.
NOTE: Refer to TSB 86-15-14 and 86-15-15 for 9" rear axle driveshaft vibration concerns.
ACTION: When vibration complaints caused by the driveshaft are encountered, refer to the following steps for the appropriate service action.
^ Vehicles with one (1) piece driveshafts
- Balance the driveshaft on the vehicle.
- If balancing is unsuccessful, replace the driveshaft.
^ Vehicles with two (2) piece steel driveshafts
- Replace two (2) piece driveshaft with a one
(1) piece aluminum driveshaft if instructed to by a technical service bulletin.
- Replace two (2) piece driveshaft with a system balanced two (2) piece service driveshaft (4R602) if a one (1) piece driveshaft is applicable.
Refer to the following service procedure to install the new design aluminum driveshaft. The driveshaft application chart on page 2 of this TSB should be used to obtain the correct aluminum driveshaft service part number.
NOTE: Some vehicles will continue to use twopiece drivelines for structural reasons. These assemblies are system balanced.
CAUTION: Never replace a two-piece steel driveshaft with a one-piece steel driveshaft.
1. Remove the existing two-piece driveshaft.
2. Remove the two-piece driveshaft center bearing support plate. Rivets are to be removed by chiseling off the heads. Drilling or the use of cutting torch may result in damage to the crossmember.
NOTE: The support plate must be removed to prevent interference with the new one-piece aluminum driveshaft.
3. Install the new one-piece aluminum driveshaft. Make sure the yellow dot on the driveshaft and axle flange are aligned.
NOTE: If the yellow dot on the axle flange is not visible, the vehicle will have to be test driven to determine the best location.
4. Tighten U-bolt nuts to 8-15 ft.lbs. (11-20 N-m). On circular flange equipped driveshaft, tighten the bolts to 61-87 ft.lbs. (73-118 N-m).
NOTE: The circular flange type attachment allows 45~ intervals for improved NVH tuning.
PART NUMBER PART NAME CLASS
E7UZ-4602-M Aluminum Driveshaft C
E7UZ-4602-N Aluminum Driveshaft C
E7UZ-4602-P Aluminum Driveshaft C
E7UZ-4602-T Aluminum Driveshaft C
E7TZ-4602-U Aluminum Driveshaft C
E7TZ-4602-V Aluminum Driveshaft C
E7TZ-4602-W Aluminum Driveshaft C
E7TZ-4602-X Aluminum Driveshaft C
E7TZ-4602-Y Aluminum Driveshaft C
E7TZ-4602-Z Aluminum Driveshaft C
OTHER APPLICABLE ARTICLES: 86-15-14 86-15-15, Supersedes 87-2-28
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual
OPERATION: SP870536A - Install one-piece driveshaft
TIME: 0.8 Hr.
OPERATION: SP870536S1 - Extra time to re-index driveshaft
TIME: 0.4 Hr. DLR. CODING: Basic Part No. 4602 - Code: 67
DRIVESHAFT APPLICATION CHART