1989 - 1998 5.9L Cummins Service Information

5.9L 12v Cummins (6BT) Maintenance schedule, Fluid Specs, & Service Part Numbers

"Severe" driving conditions includes any or any combination of the following:

• Excessive idling
• Frequent short trips or start-shutdown cycles in which the engine does not reach full operating temperature
• Driving in dusty environments
• Driving off-road or in conditions that require the use of 4 wheel drive
• Frequent towing or hauling

5.9L Cummins 6BT (12v) Maintenance Schedule

Note - All service intervals are the maximum recommended period before the service procedure should be performed. Always adhere to the OEM recommendations regarding alternative maintenance schedules for vehicles falling under the "severe duty" or "heavy duty" conditions. If unsure which service category your vehicle falls under, follow the "severe" maintenance schedule.

Service Procedure

Interval

Replace engine oil & oil filter

6,000 miles/6 months under normal driving conditions
3,000 miles/3 months under severe driving conditions

Replace fuel filter

12,000 miles/12 months under normal driving conditions
6,000 miles/6 months under severe driving conditions

Flush engine cooling system

Replace engine coolant initially at 52,500 miles/36 months then routinely every 24,000 miles/24 months

Replace automatic transmission fluid & filter

30,000 miles

Adjust automatic transmission bands

24,000 miles/24 months

Replace manual transmission fluid

60,000 miles

Replace transfer case fluid

120,000 miles

Replace front differential fluid (4x4)

15,000 miles under severe driving conditions
procedure undefined by OE under normal driving conditions

Replace rear differential fluid

15,000 miles under severe driving conditions
Interval undefined by OE under normal driving conditions

Check/adjust valve lash

24,000 miles/24 months

5.9L Cummins 6BT (12v) Service Part Numbers

Engine air filter

1989 - 1992

Fleetguard AF455M, WIX 46343

1993

Fleetguard AF25023, WIX 46338

1994 - 1998

Fleetguard AF25541, WIX 46272

Engine oil filter

Fleetguard LF16035

Oil pan drain plug

1989 - 1993

Mopar 4293859

1994 - 1998

Mopar 4778578

Oil fill cap

Cummins 4962608

Fuel filter

1989 - 1993

Fleetguard FS1232

1994 - 1996

Fleetguard FS19519 (replaces FS1253)

1997 - 1998

Fleetguard FS19598

Fuel tank cap

1989 - 1993

Stant 10819D

1994 - 1998

Stant 10830D

Serpentine belt

1989 - 1991.5

Gates K080816 (single alt w/ AC)

1991.5 - 1993

Gates K080830 (single alt w/ AC)

1994 - 1998

Gates K080653 (single alt w/ AC)

Belt tensioner assembly

Gates 38157

Lift pump (fuel pump)

1989 - 1993

Carter M73060 (OEM, mechanical pump)

1994 - 1998

Carter M73104 (OEM, mechanical pump)

Thermostat

1989 - 1993

Stant 14058

1994 - 1998

Stant 14248

Thermostat housing gasket

Mahle C31421

Radiator cap

Stant 10231

Upper radiator hose

1989 - 1991 (non-intercooled)

Gates 20957

1991 - 1993 (intercooled)

Gates 21930

1994 - 1998

Gates 22081

Lower radiator hose

1989 - 1993

Gates 20431

1994 - 1998

Gates 22082

Water pump

Gates 41181

Automatic transmission filter

Mopar 3515996 (47RH/47RE)

Automatic transmission pan gasket

Mahle W39003TC (727/47RH/47RE)

Differential pan gasket

Victor Reinz P18562 (Dana 60/70)

1989 - 1998 Dodge Ram, Cummins 12v Fluid Specs & Capacities

Note - All units of measure used herein refer to U.S. measurements, NOT Imperial. All fluid capacities are nominal and to be used for the purpose of purchasing an adequate amount prior to service. Always bring fluid level to proper indicating marker on dipstick, bottom of fill plug hole, etc. Always recheck fluid level after driving vehicle. Some fluid capacities may vary for chassis cab trucks; the following specifications are based on 2500/3500 pickup models.

Engine oil:

15W-40 (ambient temperature > 10° F)

12.0 qts capacity w/ oil filter change

10W-30 (ambient temperature 0 - 30° F w/o block heater, < 0° F w/ block heater)

5W-30 (ambient temperature < 0° F w/o block heater)

Engine coolant:

50/50 ethylene glycol coolant, distilled water

24.0 - 26.0 qts capacity
(~6 gallons)

Automatic transmission fluid:

47RH/47RE 4 spd

MOPAR ATF+4
(MOPAR 5013457AA)

~ 4.0 qts service refill capacity
14.5 - 16.5 qts dry fill capacity

Manual transmission fluid:

GETRAG G360

5W-30 motor oil

3.5 qts (7 pts)

NV4500 HD

75W-90 Castrol Syntorq
(MOPAR 4874459)

4.0 qts (8 pts)

Transfer case fluid:

NV231/NV231HD

MOPAR ATF+4 (MOPAR 5013457AA)

1.25 qts (2.5 pts)

NV241

2.4 qts (4.7 pts)

NV241HD

3.25 qts (6.5 pts)

Front differential fluid:

Dana 60

SAE 75W-140 synthetic gear oil

3.15 qts (6.3 pts)

Rear differential fluid:

Dana 70 2WD

SAE 75W-140 synthetic gear oil

3.5 qts (7.0 pts)

Dana 70 4WD

3.9 qts (7.8 pts)

Dana 80 2WD

3.2 qts (6.4 pts)

Dana 80 4WD

4.8 qts (9.6 pts)