Transfer Case Shifter - Buzz or Rattle at 2,000 Rpm
NO: 21-12-97GROUP: Transmission
DATE: Aug. 29, 1997
SUBJECT:
Transfer Case Shifter Buzz Or Rattle
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 21-13-96, DATED SEP. 20, 1996, WHICH SHOULD BE REMOVED FROM YOUR FILES AND NOTED IN THE 1996 TECHNICAL SERVICE BULLETIN MANUAL (PUBLICATION NO. 81-699-97010). ALL 4X4 VEHICLES ARE NOW INCLUDED AND THE ENTIRE REPAIR PROCEDURE HAS BEEN REVISED.
MODELS:
1996-1997 (BR) Ram Truck
SYMPTOM/CONDITION:
A buzz or clatter may be heard from the 4X4 transfer case shifter at an engine speed of approximately 2000 rpm. The condition may worsen when the engine is under a load.
NOTE:
THE BUZZ OR RATTLE WILL BE MORE NOTICEABLE ON VEHICLES EQUIPPED WITH THE 5.9L CUMMINS DIESEL ENGINE.
DIAGNOSIS:
Drive the vehicle to approximately 50 mph. If the vehicle has an automatic transmission, allow overdrive and the torque converter clutch to engage. If the vehicle has a manual transmission, shift the transmission into overdrive. Accelerate to an engine speed of approximately 2100 rpm (as long as legal speeds permit).
NOTE:
VEHICLES EQUIPPED WITH AUTOMATIC TRANSMISSIONS MUST BE DIAGNOSED WITH THE TRANSMISSION IN OVERDRIVE AND TORQUE CONVERTER CLUTCH ENGAGED.
Perform the following Repair Procedure if a buzz or clatter is heard coming from the transfer case shifter.
REPAIR PROCEDURE:
This bulletin involves bending the shift lever spring reaction tab outward to increase the spring tension on the shift lever.
1. Raise the vehicle on a lift.
2. Locate the shift lever spring reaction tab on the shifter lever assembly (Figure 1).
3. Using a suitable pry bar, bend the tab outward approximately 6 - 9 mm (1/4 - 3/8 in.) (Figure 2).
4. Lower the vehicle.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 21-03-08-92 0.3 Hrs.
FAILURE CODE: XX - Service Adjustment