Service bulletin 080420001A
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10025285 |
| Published by NHTSA | 2008-07-25 |
| Manufacturer's number | 080420001A |
| Manufacturer's date | 2008-04-01 |
| NHTSA component | POWER TRAIN:AXLE ASSEMBLY |
NHTSA's summary
EI08084 - REAR AXLE GEAR WHINE NOISE FROM HEAVY DUTY PICKUP TRUCKS EQUIPPED WITH 11.50" RING GEAR AND MW7 AUTOMATIC TRANSMISSION (DIAGNOSE RING AND PINION). BUILT FROM OCTOBER 12, 2007 THRU OCTOBER 17, 2007. *PE
The document
No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.
Components
Transmission and driveline, Axle
| CHEVROLET SILVERADO 2500 | 2008 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| CHEVROLET SILVERADO 3500 | 2008 (the catalog's model; the bulletin names a series or trim of it) |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 06-00-89-026L | 2017-08-15. Service bulletin. This warranty administration bulletin provide policy information on a revised customer concern not duplicated/verified labor operation numbers and how to submit CCND. |
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| PIP4365D | 2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have the transfer case is inoperative, difficult to shift or has no torque to the front prop shaft after 4wd is engaged. Technician will need to manually shift the transfer case. If the actuator shaft is bound up or all ranges cannot be obtained, then the transfer case should be removed for internal inspection. If the snap ring is found out of the groove, replacement of the actuator shaft and snap ring will be required. |
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| PIP3720D | 2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician with the axel setup information from American Axle Manufacturing. Technician should be advised that the maximum pinion shim to be used or stacked behind the pinion is 0.050?, and the minimum pinion shim is 0.020? for an 8.6 axle. The range for available pinion depth shims for the 10.5? axle is 0.006? to 0.024?. When setting the backlash it should be set between 0.003? to 0.005? on a new ring and pinion for any American Axle Manufacturing application. The ring and pinion can be reused or adjusted if the mileage is less than 500 miles, if not used for towing. Technician should be advised that a ?roller coaster? or ?hourglass? pattern on the bearings may be normal up to 10,000 miles and possibly longer. With a mis-machined housing you may get a heel pattern on both sides of the gear teeth at build up can generally be corrected with backlash adjustments. When setting up an 8.6? axle with a 5 cut gear set is to use a 0.035? pinion shim and set backlash to 0.004?. When using the newer 2 cut gear set also use a 0.035? pinion shim and still set backlash to 0.004?. To set the gear pattern use backlash to adjust the pattern heel to toe. Use the pinion shim to adjust the height of the pattern. The proper drive pinion bearing pre-load is from 15 - 30 inch pounds with new bearings. The total torque to turn after the differential case is installed should increase 5 - 10 inch pounds at the pinion. A new pinion nut must be used whenever the old one is removed. The axle shaft end play specification is 0.012? per side and the radial specification is 0.002? - 0.003?. Technician should be advised that synthetic lube can be used in all new American Axle Manufacturing axle assemblies. The new pinion seal for the 8.6? axle assembly is a two piece design. |
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| 09-04-21-003D | 2011-05-25. Service bulletin. GM: WHEN STOPPING OR ACCELERATING THERE MAY BE A CLUNK NOISE AND ITS AS IF THE VEHICLE IS BUMPED FROM BEHIND. THIS CAN BE CAUSED BY A SLIP IN THE REAR PROPSHAFT. *RM |
| 070417002 | 2008-02-20. Service bulletin. WHINE TYPE NOISE COMING FROM REAR OF VEHICLE (DIAGNOSE AND REPLACE REAR PROPELLER SHAFT). *NJ |
| 07320 | 2008-01-23. Service bulletin. CHEVROLET GMC SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. FRONT AXLE VENT TUBE KINKED - FLUID LEAK. *NJ CSC WAS RECEIVED. UPDATED 4/24/08. *NJ |