D 350 Pickup L6-359 5.9L DSL (1989)
Clutch Disc: Customer Interest
M/T - Groaning Noise Below 1,400Rpm
NO: 06-01-94
GROUP: Clutch
DATE: Aug. 12, 1994
SUBJECT:
Transmission Noise Below 1400 RPM
MODELS:
1989 - 1993 (AD) Ram Pick Up/Ram Cab & Chassis
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 5.9L DIESEL ENGINE AND GETRAG MANUAL TRANSMISSION.
SYMPTOM/CONDITION:
Some 1989 to 1993 Ram trucks equipped with the 5.9L Cummins diesel and manual transmission may exhibit a powertrain induced cyclic groaning or
harsh noise condition that appears to be transmission or driveline related. The noise condition is noticeable in all gears, but is especially noticeable in
fourth and fifth gears. The noise condition will occur below 1400 RPM during float, coast, or light throttle operation.
The noise is not damaging to the powertrain and is due to the dampening characteristics of the clutch springs.
DIAGNOSIS:
1.
Road test the vehicle a sufficient distance to ensure that the transmission has reached normal operating temperature.
2.
Evaluate the vehicle for the noise condition in each gear during float, coast, and light throttle operation.
3.
Record the vehicle speed (MPH), in each gear, when the noise condition is no longer present.
4.
Compare your recorded MPH readings in each gear with the recommended minimum operating gear selection chart.
5.
If an objectionable noise condition is present at speeds ABOVE the minimum recommended gear selection speed (MPH) on the chart, perform the
following repair procedure.
6.
If the noise condition is ONLY present at speeds BELOW the minimum recommended gear selection speed (MPH) on the chart, no repair is
required. Perform a road test with the vehicle owner, using the recommended gear selection speeds, to ensure that the owner understands that the
noise condition is the result of driving technique and not a problem in the transmission or powertrain system.
PARTS REQUIRED:
1
04778414
Disc, Clutch
4
06024473
Bolts (If Required)
REPAIR PROCEDURE:
This bulletin involves the removal and replacement of the clutch disc.
1.
Disconnect the battery negative cable.
