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TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 2 Download

Page 512 of 1555

TM 9-2320-387-24-2 TROUBLESHOOTING SYMPTOM INDEX (Co&d) MECHANICAL MALFUNCTION TROUBLESHOOTING PROCEDURE PAGE 16. 17. 18. ;:: 21. 22. 23. z* 26: 27. 28. 29. 30. 31. Z: 34. 35. 36. 37. 38. 39. 40. 41. 42. TRANSMISSION Transmission Control Module (TCM) codes are 59,71,75,79,81,82,83. ... No l-2 upshift or delayed upshift. .............. ; .............. l-2 shift soft or slips ....................................... l-2 shift firm or rough. ..................................... No 2-3 upshift or delayed upshift. ............................. 2-3 shift soft or slips ....................................... 2-3 shift firm or rough ...................................... No 3-4 upshift or delayed upshift. ............................. 3-4 shift soft or slips ....................................... 3-4 shift firm or rough. ..................................... No engine braking - third gear. ............................... No engine braking - second gear. .............................. No engine braking . first gear ................................ No drive or slips in drive. ................................... No reverse or slips in reverse. ................................ Vehicle moves in neutral .................................... Vehicle moves in park. ..................................... Transmission noisy. ....................................... TRANSFER CASE Transfer case difficult to shift ................................ Transfer case noisy. ....................................... DIFFERENTIAL Differential noisy ......................................... BRAKES Noisy brakes ............................................ Brake pedal pulsation. ..................................... Erratic braking action. ..................................... WHEELS, SUSPENSION, AND STEERING Poor directional stability or uneven tire wear ..................... Noisy suspension ......................................... Hard steering or excessive play in steering. ...................... 14-7 14-9 14-9 14-10 14-10 14-10 14-11 14-11 14-11 14-12 14-12 14-13 14-13 14-13 14-13 14-14 14-14 14-14 14-15 14-15 14-15 14-15 14-16 14-16 14-16 14-16 14-16 14-2