5.9L Cummins 6BT Maintenance Schedule & Service Info

12v Cummins Maintenance Schedule, Fluids Specs, & Service Guide

Applicable Models:

1989 - 1993 Dodge D250, D350, W250, W350
1994 - 1998 Dodge Ram 2500, 3500

Applicable Engines:

5.9L Cummins 6BT (12 valve)

Applicable Transmissions:

Chrysler 47RH/47RE, Getrag G360, New Venture NV4500

Service Intervals | 1989 - 1998 Dodge Ram, Cummins Turbodiesel

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. Severe driving conditions include, but are not limited to, excessive idling, frequent short trips that keep the engine from reaching normal operating temperature, driving in dusty environments, driving off-road or in conditions that require 4 wheel drive, and frequent towing or hauling. 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 Service Part Numbers

Description

Part Number(s)

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

Mahle/Victor Reinz P18562 (Dana 60/70)

Oil & Fluid Capacities & Specifications | 1989 - 1998 Dodge Ram, Cummins Turbodiesel

Item

Oil/Fluid Specification

Capacity [1]

Engine oil

Ambient temp > 10° F

SAE 15W-40 diesel oil
Recommend Amsoil HD 15W-40 synthetic diesel oil

12.0 qts w/ filter change

Ambient temp 0° to 30° F
Block heater not required

SAE 10W-30 diesel oil
Recommend Amsoil HD 10W-30 synthetic diesel oil

Ambient temp < 0° F
Block heater required

Ambient temp < 0° F
Block heater not required

SAE 5W-30 diesel oil
Recommend Amsoil Max Duty 5W-30 synthetic diesel oil

Engine coolant

50/50 ethylene glycol coolant, distilled water
Recommend Fleetguard CC2820extended life coolant (ELC) [2]

24.0 - 26.0 qts capacity
(~6 gallons)

Automatic transmission fluid

MOPAR ATF+4 automatic transmission fluid, MOPAR 68218057AA

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

Manual transmission fluid

GETRAG G360

SAE 5W-30 motor oil
Recommend Amsoil Signature Series 5W-30 synthetic motor oil

3.5 qts (7 pts)

NV4500 HD

75W-90 Castrol Syntorq [3], MOPAR 4874459or GM 12346190

Recommend Amsoil synthetic 75W-90 GL-4 manual transmission fluid

4.0 qts (8 pts)

Transfer case fluid

NV231/NV231HD

MOPAR ATF+4 automatic transmission fluid, MOPAR 68218057AA
Recommend Amsoil Signature Series ATF

1.25 qts (2.5 pts)

NV241

2.4 qts (4.7 pts)

NV241HD

3.25 qts (6.5 pts)

Front differential fluid

SAE 75W-140 synthetic gear oil
Recommend Amsoil Severe Gear 75W-140 synthetic gear oil

3.15 qts (6.3 pts)

Rear differential fluid

Dana 70 2WD

SAE 75W-140 synthetic gear oil
Recommend Amsoil Severe Gear 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)

[1] Listed capacities are nominal; always fill to proper dipstick, fill plug, or fluid level indicator. Oil and fluid levels should be rechecked after driving.
[2] Fleetguard ES COMPLEAT ELC extended life engine coolant is a low silicate formulation that requires no SCA/DCA on initial fill and has an estimated service life of 150,000 miles.
[3] The fluid specification for the NV4500 transmission is highly specific. The (3) listed manual transmission oils are the only known fluids that meet the factory Castrol Syntorq specification. Failure to use a compatible fluid will result in synchronizer failure or other transmission problems. Highly recommend Amsoil synthetic 75W-90 GL-4 manual transmission fluid; it is the most readily available option, OE fluids are becoming increasingly difficult to find and expensive to purchase.