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Transfer Case NP203 Rebuild Kits drawing and parts list Print E-mail

New Process Model NP203 Rebuild Kits and Parts Full Time Transfer Case

We offer quality rebuilt New Process model NP203 transfer case rebuild kits and replacement parts.  np203_idtag.jpgRebuilt NP203 Transfer cases and partsOur NP203 kits are designed to be professional grade overhaul kits.  NP203 Transfer Case Illustration exploded view is provided to assist you in identifying parts and assembly sequence details. The NP203 transfer case was used by Dodge from 1974-1979, Ford from 1974 to 1979 and Chevrolet and GMC from 1973 to 1979. The NP203 transfer case is a chain driven transfer case with a cast iron case. The NP203  has a heavy duty case with a 2:00:1 low range with a set of differentials for full time use. The following link is a cross reference table to assist you in identification of your transfer case.  Check the tag located on the rear of the unit for a model number and an assembly number. An illustrated drawing is provided below to assist you in parts identification, ordering and assembly. Should you elect to replace your NP203 transfer case unit with one of our high quality rebuilt remanufactured transfer case, these units are provided with a 12 month unlimited mileage warranty.  All rebuilt transfer cases have new seals, bearings, chains, fork pads, encoder motors and viscous couplers.  All shafts, sliders, hubs and planets are inspect to ensure proper factory tolerances are maintained. All units are tested at the factory prior to shipment.

This chain drive transfer case's overall length of the NP203 case is 22"-23" from the face of the case to the rear output yoke's center. The shift positions of the NP203 are as follows from the most forward position (towards the engine) to the rear most position: Low Range Lock, Low Range, Neutral, High Range, High Range Lock. The NP203 has a high range of 1.00:1 and a low range of 2.01:1. The NP203 has fill hole for lubrication in the approximate middle of the rear face of the case. There isn't a drain plug in the NP203. Fluid is drained by removing the bottom bolts on the passenger side cover. The NP203 uses 10w-30 motor oil as for lubrication. The NP203 is designed with four sections. The differential housing, the output housing, the chain case, and the range box. Both forward two sections of the NP203 are made of cast iron, and the rear two sections are generally aluminum. The model tag is on the front of the chain case, above the output shaft. The NP203 assists in traction on almost every level, but can decrease gas mileage and wear on the front axles. Check out our conversion kits for increased gas milage.

Below is a list of professional parts that we provide for the NP203:

New Process Model 203
Full-Time Transfer Case
  Recommended fluid for NP203 --- 30WT

PART NUMBER

PER UNIT

DESCRIPTION

TYPE

YEARS

COST

DTS-BK203G

1

Rebuilder Kit - Bearings, Gaskets, Small Parts and Seals General Motors & Dodge See typical kit

1971-79

$201.24

DTS-BK203F   Rebuilder Kit - Bearings, Gaskets, Small Parts and Seals Ford w/Direct Mount
 1973-79  $201.24
DTS-BK203FD   Rebuilder Kit - Bearings, Gaskets, Small Parts and Seals Ford w/Remount Mount
 1973-77  $209.89
TRS-TSK203F

1

Overhaul Kit - Gaskets, O' Rings and Seals Ford


$21.98

TRS-TSK203G
  Overhaul Kit - Gaskets, O' Rings and Seals General Motors & Dodge    $41.91
TRS-301001   Small Parts Kit
     $94.51
201203

1

Adapter to Case Gasket Except Ford

1973-79

$5.24

201203F

1

Adapter to Transfer Case Gasket Ford

1973-79

$3.61

201203A

1

Input Bearing Retainer Gasket All

1973-79

$1.91

301236

1

Power Take-Off Cover Gasket All

1973-79

$2.98

201052

2

GM Adapter Seal with Automatic 2.000 X 2.623

Various

$7.00

201023

2

GM Adapter Seal with Standard (Not in Kit) 1.375 X 2.250

Various

$8.16

201032

1

Input Gear Seal - Double-Lip 1.938 X 2.686

Various

$7.80

201050

2

Input Gear Seal - Use Back to Back 1.938 X 2.686

Various

$4.10

201057

1

Front Output Shaft Seal 1.750 X 3.061

Various

$11.00

201027

2

Ford F & R Output Shaft Seal 1.875 X 3.061

Various

$7.00

201059

1

Rear Output Shaft Seal 2.125 X 2.750

Various

$7.10

301515

1

Input shaft Ball Bearing  

1973-79

$21.64

301523

1

Front Output Shaft Ball Bearing  

1973-79

$21.34

301515

1

Main shaft Ball Bearing  

1973-79

$26.14

301523

1

Rear Output Shaft Ball Bearing  

1973-79

$21.34

TRS-301645
  Range Slider
     $71.85
TRS-301530

1

Oil Pump Gear 5 teeth - 38 spline - 1/2" wide White Nylon

1973-79

$21.94

TRS301715
  Differential Carrier (w/Cage & Bolts, w/o gears)     $216.87
TRS-HV-005

1

Drive Chain, 98 Pins, 3/8" Pitch, Rocker Pin 2.5" Wide - 49 Links

1973-78

$250.19

TRS-HV-009

1

Drive Chain, 72 Pins, 1/2" Pitch, Rocker Pins 2.0" Wide - 36 Links

1978-79

$141.40

TRS-301997
  Speedo Gear Red 7 Teeth
     $50.14
TRX203   Book on CD Rom, Troubleshooting & Overhaul Guide    

$49.16


Transfer Case Illustration click image to enlarge.

 np203_p1_th.jpg
np203_p2_th.jpg  

 

 

 

 

 

 
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