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TSB 03-02-96

Shudder Pulling Away From A Stop When Operated Near Max GVWR

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Date: May 10, 1996

Models: 1995 -1996 (BR) Ram Trucks

NOTE: THIS BULLETIN APPLIES TO 2500 and 3500 SERIES 4X2 REGULAR CAB VEHICLES EQUIPPED WITH TWO-PIECE PROPELLER SHAFTS AND AUTOMATIC TRANSMISSIONS ONLY..

THIS BULLETIN REVISES TSB 16-01-94 DATED OCT. 14,1994, FOR THE VEHICLES SPECIFIED IN THIS NOTE ONLY AND SHOULD BE NOTED IN YOUR FILES AND IN THE 1994 TECHNICAL SERVICE BULLETIN MANUAL (PUBLICATION NO. 81-699-95054).

Symptoms:

The vehicle may exhibit a driveline shudder while pulling away from a stop when operated near maximum GVW rating.  

Discussion:

Launch shudder may be due to undesirable driveline angles and may become worse when the vehicle is used at or near its maximum GVW rating.

As the vehicle is loaded, the driveline angle will change. In the case of maximum GVW, the rear differential may rise above the rear propeller shaft center bearing when the vehicle is launched from a stop. The resulting driveline alignment could cause a shudder in the driveline.

NOTE:   REMOVAL OF THE CROSS MEMBER AND REPLACEMENT OF THE TWO-PIECE DRIVELINE AND CENTER BEARING SUPPORT BRACKET WITH A SINGLE-PIECE PROPELLER SHAFT WILL ELIMINATE THE DRIVELINE SHUDDER AT ANY VEHICLE LOAD. 

Parts:

1    52105322    Single Piece Propeller Shaft
                          BR 2500 - 4X2 Standard Cab, Eight Foot Box, 8800 GVW,
                          with 5.9L Gas Engine, Automatic Transmission, and Dana 60 Axle
1    52105320    Single Piece Propeller Shaft
                          BR 2500 - 4X2 Standard Cab, Eight Foot Box, 8800 GVW,
                          with either a 5.9L Gas, 8.0L or 5.9L Cummins Diesel Engine,
                          Automatic Transmission, and Dana 70 Axle
                                                        or
                           BR 3500 - 4X2 Standard Cab, Eight Foot Box, 10500 GVW,
                           with either a 5.9L Gas Engine, Automatic Transmission, and Dana 80 Axle
1     52105321   Single Piece Propeller Shaft

                          BR 3500 - 4X2 Standard Cab, Eight Foot Box, 10500 GVW,
                           with either an 8.0L or 5.9L Cummins Diesel Engine,
                          Automatic Transmission, and Dana 80 Axle
4    6034965      Universal Joint Strap Bolts
2    4428723      Universal Joint Straps    

Repair:

This bulletin involves removing the cross member and replacing the two piece propeller shaft with a single piece propeller shaft.

1.    Shift the transmission into neutral. Support and raise the vehicle on an appropriate vehicle lift.

2.    Remove the universal joint strap bolts at the pinion shaft yoke.

3.    Remove the bolts that attach the center bearing support bracket to the frame cross member (figure 1).  

4.    Slide the slip yoke off the transmission output shaft and remove the propeller shaft.

5.    Slide the slip yoke of the appropriate propeller shaft (specified in the Parts Required section of this bulletin) onto the transmission output shaft.

6.    Position the universal bearing caps onto the rear pinion shaft yoke.

7.    Install new universal joint straps (P/N 4428723) and universal joint strap bolts (P/N 6034965). Tighten the bolts to 29 Nm (22 ft. lbs) of torque.

8.   Lower the vehicle.

Notes:

POLICY:   Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:
Labor Operation No: 16-30-01-95 ................................... 0.3 Hrs.

FAILURE CODE: P8 - New Part


Thanks to Bob Bergevin and Barry Drodge for supplying this TSB information

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This page was edited on: May 3, 2004