Tech Page

Engine Options

3.9 L (238 cu.in.) V6
5.2 L (318 cu.in.) V8
5.9 L (360 cu.in.) V8 (Gas)
5.9 L (359 cu.in.) L6 (Diesel)
8.0 L (488 cu.in.) V10

Transfer Case

NP231HD
NP241
NP241HD

P.T.O Adapter

NV-021

Automatic Transmission

42RH
46RH
47RH

Engine Specifications

3.9 L (238 cu.in.) V6

Engine Type	90' V-6 OHV
Bore & Stroke	99.3 x 84.0 mm. (3.91 x 3.31 in.)
Displacement	3.9 L (238 cu.in.)
Compression Ratio	9.1 :1
Torque	312 N.m (230 ft. lbs.) @ 3200 rpm
Firing Order	1-6-5-4-3-2
Lubrication	.......................................................................Pressure Feed - Full Flow Filtration
Engine Oil Capacity	3.8 L ( 4.0 Qts.) with filter
Cooling System	Liquid Cooled - Forced Circulation
Cooling Capacity	14.3 L (15.1 Qts.)
Cylinder Block	Cast Iron
Crankshaft	Nodular Iron
Cylinder Head	Cast Iron
Combustion Cambers	" Fast Burn " Design
Camshaft	Nodular Cast Iron
Pistons	Aluminum Alloy with Strut
Connecting Rods	Forged Steel

5.2 L (318 cu.in.) V8

Engine Type	90' V-8 OHV
Bore & Stroke	99.3 x 84.0 mm.(3.91 x 3.31 in.)
Displacement	5.2 L (318 cu.in.)
Compression Ratio	9.1 :1
Torque	407 N.m (300 ft. lbs.) @ 3200 rpm
Firing Order	1-8-4-3-6-5-7-2
Lubrication	Pressure Feed - Full Flow Filtration
Engine Oil Capacity	4.7 L (5.0 Qts.) with Filter
Cooling System	Liquid Cooled - Forced Circulation
Cooling Capacity	16.1 L (17.0 Qts.)
Cylinder Block	Cast Iron
Crankshaft	Nodular Iron
Cylinder Head	Cast Iron
Combustion Cambers	.....................................................................Wedge - High Swirl Valve Shrouding
Camshaft	Nodular Cast Iron
Pistons	Aluminum Alloy with Strut
Connecting Rods	Forged Steel

5.9 L (360 cu.in.) V8 (Gas)

Engine Type	90' V-8 OHV
Bore & Stroke	101.6 x 90.9 mm. (4.00 x 3.58 in.)
Displacement	5.9 L (360 cu.in.)
Compression Ratio	9.1 :1
Torque	448 N.m (330 ft. lbs.) @ 3250 rpm
Firing Order	1-8-4-3-6-5-7-2
Lubrication	Pressure Feed - Full Flow Filtration
Engine Oil Capacity	4.7 L (5.0 Qts.) with Filter
Cooling System	Liquid Cooled - Forced Circulation
Cooling Capacity	14.7 L (15.5 Qts.)
Cylinder Block	Cast Iron
Crankshaft	Nodular Iron
Cylinder Head	Cast Iron
Combustion Cambers	....................................................................Wedge - High Swirl Valve Shrouding
Camshaft	Nodular Cast Iron
Pistons	Cast Aluminum Alloy
Connecting Rods	Forged Steel

5.9 L (359 cu.in.) L6 (Diesel)

Engine Type	Inline 6 (Cummins Turbo Diesel)
Bore & Stroke	102.0 x 120.0 mm. (4.02 x 4.72 in.)
Displacement	5.9 L (359 cu. in.)
Compression Ratio	17. 5 to 1
Torque (Auto)	542 N.m (400 ft. lbs.) @ 1600 rpm
Torque (Manual)	569 N.m (420 ft. lbs.) @ 1600 rpm
Firing Order	1-5-3-6-2-4
Lubrication	.......................................Pressure Feed - Full Flow Filteration with Bypass Valve
Engine Oil Capacity	9.5 L (10.0 Qts.) with Filter
Cooling System	Liquid Cooled - Forced Circulation
Cooling Capacity	23 L (24 Qts.)
Cylinder Block	Cast Iron
Crankshaft	Induction Hardened Forged Steel
Cylinder Head	Cast Iron
Combustion Cambers	High Swirl Bowl
Camshaft	Chilled Ductile Iron
Pistons	Cast Aluminum
Connecting Rods	Forged Steel

8.0 L (488 cu.in.) V10

Engine Type	90' V-10 OHV
Bore & Stroke	101.6 x 98.6 mm. (4.00 x 3.88 in.)
Displacement	8.0 L (488 cu.in.)
Compression Ratio	8.4 :1
Torque	617 N.m (450 ft. lbs.) @ 2400 rpm
Firing Order	1-10-9-4-3-6-5-8-7-2
Lubrication	....................................................................Pressure Feed - Full Flow Filteration (Direct Crankshaft Driven Pump )
Engine Oil Capacity	6.6 L (7.0 Qts.)
Cooling System	Liquid Cooled - Forced Circulation
Cooling Capacity	20.5 L (21.75 Qts.)
Cylinder Block	Cast Iron
Crankshaft	Nodular Cast Iron
Cylinder Head	Cast Iron
Combustion Cambers	Wedge - High Swirl
Camshaft	Nodular Cast Iron
Pistons	Cast Aluminum Alloy
Connecting Rods	Forged Steel

Automatic Transmission

42RH Transmission

The 42RH is used with 3.9 L engine in 4x2 1500 models with a 273 mm (10.75 in.) torque converter.

42RH forward gear ratios are:

First gear = 2.74 : 1
Second gear = 1.54 : 1
Third gear = 1.00 : 1
Fourth gear = 0.69 : 1

46RH / 47RH Transmission

The 46RH is used with 3.9 L, 5.2 L, and 5.9 L gas engine. The 47RH is used with V10 and Cummins Diesel engines only. The 46RH uses a 273 mm (10.75 in.) torque converter while the 47RH uses a 310 mm (12.2 in.) torque converter.

46RH / 47RH forward gear ratios are:

First gear = 2.45 : 1
Second gear = 1.45 : 1
Third gear = 1.00 : 1
Fouth gear = 0.69 : 1

Manual Transmission

NV3500 Transmission

The NV3500 is a medium-duty, fully synchronized 5-speed manual transmission. It is used with 3.9 L and 5.2 L engines and available in two versions; a wide ratio and a close ratio.

...............Wide Ratio Version .........................................................................Close Ratio Version

..First gear = 4.016 : 1........................................................................First gear = 3.49 : 1

..Second gear = 2. 318 : 1..................................................................Second gear = 2.16 : 1

..Third gear = 1.40 : 1........................................................................Third gear = 1.40 : 1

..Fourth gear = 1 : 1...........................................................................Fourth gear = 1 : 1

..Fifth gear = 0.729 : 1.......................................................................Fifth gear = 0.729 : 1

..Reverse = 3. 55 : 1..........................................................................Reverse = 3. 55 : 1

NV4500 Transmission

The NV4500 is a fully synchronized 5-speed manual transmission available in two versions, a standard duty version for 5.2 L and 5.9 L applications and a heavy duty version for V10 / Cummins Diesels.

NV4500 gear ratios are:

First gear = 5.61 : 1
Second gear = 3.04 : 1
Third gear = 1.67 : 1
Fourth gear = 1.00 : 1
Fifth gear = 0.74 : 1
Reverse = 5.61 : 1

Transfer Case

NP231HD

NP241

NP241HD

All of the above mentioned transfer cases are part-time transfer cases with a low-range gear system. They provide three operating ranges plus a Nuetral position. The low range position provides a gear reduction ratio of 2.72:1 for increased low speed torque capability. Operating ranges are: 2-high, 4-high and 4-low.

The NP231 HD is used in 1500 models only. The NP241 is used in 2500 models and the NP241 HD is used in 2500 and 3500 models with a V10 or diesel engine.

Recommended lubricant for all three transfer case models is Mopar Dexron II, or ATF Plus. Approximate lubricant refill capacities are 3.1 liters (6.5 pints) for the NP241 HD and 1.5 to 2 liters (3 to 3.6 pints) for the NP231 HD.

PTO Adapter

The NV 021 PTO adapter provides power take-off capability for 2-wheel and 4-wheel drive BR models with an automatic transmission. The adapter is available as an option on 2500 and 3500 models.

Front Axles

Model: Dana 44

Axle Type	Hypoid
Lubricant .	..................................................................................................................Thermal Stable SAE 80W-90
Lube Capacity	2.28 L ( 4.8 pints )
Axle Ratio Options	3.54, 3.55, 3.92, 4.09
Ring Gear Diameter	215.9 mm ( 8.50 in. )
Pinion Standard Setting	109.5 mm ( 4.312 in. )
Pinion Bearing Preload Original Bearing New Bearing	. 1-2 N.m ( 10-20 in. lbs. ) 2.3-4.5 N.m (20-40 in. lbs. )

Model: Dana 60

Axle Type	Hypoid
Lubricant .	..................................................................................................................Thermal Stable SAE 80W-90
Lube Capacity	3.6 L ( 122 oz. )
Axle Ratio Options	3.54, 4.10
Ring Gear Diameter	247.6 mm ( 9.75 in. )
Pinion Standard Setting	127 mm ( 5.000 in. )
Pinion Bearing Preload Original Bearing New Bearing	. 1-2 N.m ( 10-20 in. lbs. ) 2.3-4.5 N.m ( 20-40 in. lbs. )

Rear Axles

Model: 9 1/4 in.

Axle Type	Semi-floating, hypoid
Lubricant .	.................................................................................................................................................SAE 80W-90
Lube Capacity	2.26 L ( 4.77 pints )
Axle Ratio Options	. 3.21, 3.55, 3.92
Differential Case Clearence Case Flange Runout Bearing Preload	. 0.12 mm ( 0.005 in. ) 0.076 mm ( 0.008 in. ) 102 N.m ( 75 ft. lbs. )
Ring Gear Diameter Backlash Runout	. 23.50 cm ( 9.25 in. ) 0.12- 0.20 mm ( 0.005- 0.008 in. ) 0.127 mm ( 0.005 in. )
Pinion Bearing Preload	. 1-2 N.m ( 10-20 in. lbs. )

Model: Dana 60

Axle Type	............................................Hypoid
Lubricant .	..................................................................................................................Thermal Stable SAE 80W-90
Lube Capacity 4x2 4x4	. 2.95 L ( 6.26 pints ) 3.43 L ( 7.25 pints )
Axle Ratio Options	. 3.54, 4.09
Ring Gear Diameter Backlash	. 247.7 mm ( 9.75 in. ) 0.10- 0.23 mm ( 0.004- 0.009 in. )
Pinion Standard Setting	127.0 mm ( 5.000 in. )
Pinion Bearing Preload Original Bearing New Bearing	. 1- 3 N.m ( 10- 20 in. lbs. ) 2- 5 N.m ( 20- 40 in. lbs. )

Model: Dana 70

Axle Type	............................................Hypoid
Lubricant .	..................................................................................................................Thermal Stable SAE 80W-90
Lube Capacity 4x2 4x4	. 3.311 L ( 7.0 pints ) 3.666 L ( 7.75 pints )
Axle Ratio Options	. 3.54, 4.10
Ring Gear Diameter Backlash	. 266.7 mm ( 10.50 in. ) 0.10- 0.23 mm ( 0.004- 0.009 in. )
Pinion Standard Setting	. 136.525 mm ( 5.375 in. )
Pinion Bearing Preload Original Bearing New Bearing	. 1- 3 N.m ( 10- 20 in. lbs. ) 2- 5 N.m ( 20- 40 in. lbs. )

Model: Dana 80

Axle Type	............................................Hypoid
Lubricant .	..................................................................................................................Thermal Stable SAE 80W-90
Lube Capacity 4x2 4x4	. 3.22 L ( 6.8 pints ) 4.79 L (10.1 pints )
Axle Ratio Options	. 3.54, 4.10
Ring Gear Diameter Backlash	. 279.4 mm ( 11.00 in. ) 0.13- 0.23 mm (0.005- 0.009 in. )
Pinion Standard Setting	. 124.625 mm (5.812 in. )
Pinion Bearing Preload Original Bearing New Bearing	. 1- 3 N.m (10- 20 in. lbs. ) 2- 5 N.m ( 20- 40 in. lbs. )

All the information on this page is taken from the 1995 Dodge Ram Truck Service Manual

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