> TSB's > 21-006-06

TSB 21-006-06

Transmission Jumps Out Of Reverse

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Geno's Garage Truck Accessories

Date: March 11, 2006  

Models: 2005 - 2006 (DH/D1) Ram Truck Diesel

NOTE: This bulletin applies to vehicles equipped with Cummins Turbo Diesel
engines, sales code ETH and G56 manual transmissions, sales code DEG.

This bulletin involves replacing the reverse synchronizer.

A customer may experience the transmission jumping out of reverse.

If customers indicate that the condition is present, perform the Repair Procedure.

Parts Required:
Qty. Part No. Description
1 05142834AB Reverse Synchronizer Assy.

Special Tools/Equipment Required:

938     Gear/Bearing Puller Bridge Adapter
9647 Gear/Bearing Puller

Repair Procedure: 
1.      Disconnect and isolate the negative battery terminal.
2. Using the procedures outlined in the Service Information on TechCONNECT, remove
the transmission from the vehicle,
NOTE: Use care not to disturb the 5th gear synchro. It can easily come apart when
the reverse synchro is removed. The synchro springs, keys and balls are
easily lost.
3. Disassemble the transmission to the point where the mainshaft is removed from the
4. On 4X4 vehicles, remove the snap ring that retains the main shaft bearing. This snap
ring is not present on 4X2 vehicles as the bearing is retained by the yoke.
5. Remove reverse gear synchronizer sleeve from reverse gear synchronizer hub.
6. Remove the mainshaft bearing and reverse synchro hub using bearing puller, 9647,
and adapter bridge, 938.
7. Install a new reverse synchronizer assembly, p/n 05142834AB.
8. Heat mainshaft bearing on bearing heater to a maximum of 177 Celsius (350°
9. Install the mainshaft bearing and snap ring if equipped.
10. Assemble the remainder of the transmission.
11. Install the transmission in the vehicle
12. Connect the negative battery cables.

Policy:    Reimbursable within the provisions of the warranty.

Time Allowance:

Labor Operation No:   Description Amount
21-04-20-90 Install Reverse Synchronizer 4.5 Hrs.
21-04-20-60 Optional Equipment - 4X4 0.7 Hrs.

Failure Code:

ZZ        Service Action

I would like to thank Bob Bergevin, Arthur Cantrall, Barry Drodge, David Lovell, Bill Maurits, and Steve for supplying the information for these bulletins. And a big thank you goes to Geno's Garage for making possible.


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This page was edited on: May 3, 2004