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TSB 21-009-01

NV5600 Countershaft Service

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Date: October 15, 2001

Models: 2001 BE/BR Ram Truck

NOTE: THIS BULLETIN INVOLVES RAM TRUCKS MANUFACTURED PRIOR TO MARCH 17,2001 AND EQUIPPED WITH THE NV5600 6-SPEED, HEAVY DUTY TRANSMISSION.

Note: some 2000 Rams were built with NV5600 transmissions that also used this synchronizer assembly - Dave

Discussion:

Customers may experience a shifter vibration (commonly referred to as "gear clash") of the shift knob when shifting from one gear to another between 2500 and 3500 RPM after a cold start up. This condition is most evident when ambient temperatures are at or near 0° C (32° F) but can occur at warmer temperatures as well. The condition is most often reported on 3rd to 4th gear shifting, but can occur in the other shift ranges as well. The problem can be verified by assuring the transmission is at ambient temperature, vehicle moving and, with the engine at 2500 to 3500 RPM, shifting into and out of the gear ranges.

Transmission replacements to address this issue have been excessive, partly due to the need for a 20-ton press to disassemble the countershaft assembly. If such a press is available, rebuilding the countershaft assembly is preferred. In the event a press is not available, a new countershaft assembly (PN 05073361AA) has been made available.

Follow the service procedures in the appropriate service manual (2001 BR/BE Ram Truck Service Manual Volume 2 - 81-370-1009) to complete necessary repairs. Follow normal warranty procedures to report the repairs.

CAUTION: THIS REPAIR MAY INCLUDE DISASSEMBLY OF THE COUNTERSHAFT ASSEMBLY, REQUIRING THE USE OF A 20-TON PRESS. ATTEMPTS TO USE LESSER EQUIPMENT TO EFFECT THIS REPAIR COULD RESULT IN DAMAGE OR INJURY.

Policy:    Information Only

 


Thanks to Bob Bergevin for supplying this TSB information

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This page was edited on: May 3, 2004