TM-9-2320-272-23-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-1 - Page 460 of 1313

FIELD MAINTENANCE

EXCESSIVE NOISE DURING SHIFTING

INITIAL SETUP:

Tools and Special Tools

Tool Kit, General Mechanic's: Automotive

(Volume 5, WP

0826, Table 1, Item 56)

Personnel Required

(2)

References

Point to Point Schematics

References (cont.)

Volume 3, WP

0362

Volume 3, WP

0376

Volume 3, WP

0403

Volume 5, WP

0820

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

EXCESSIVE NOISE DURING SHIFTING

NOTE

Conduct these malfunction tests if there is excessive noise during shifting. This procedure

will check transmission fluid level, transmission fluid viscosity, and the condition of propeller

shaft universal joints and propeller shaft flanges.

TM 9-2320-272-23-1

0031

0031-1