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 re-manufactured 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

DTS-BK203G

1

Rebuilder Kit - Bearings, Gaskets, Small Parts and Seals General Motors & Dodge See typical kit
DTS-BK203F   Rebuilder Kit - Bearings, Gaskets, Small Parts and Seals Ford w/Direct Mount
DTS-BK203FD   Rebuilder Kit - Bearings, Gaskets, Small Parts and Seals Ford w/Remount Mount
TRS-TSK203F

1

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

1

Adapter to Case Gasket Except Ford
201203F

1

Adapter to Transfer Case Gasket Ford
201203A

1

Input Bearing Retainer Gasket All
301236

1

Power Take-Off Cover Gasket All
201052

2

GM Adapter Seal with Automatic 2.000 X 2.623
201023

2

GM Adapter Seal with Standard (Not in Kit) 1.375 X 2.250
201032

1

Input Gear Seal - Double-Lip 1.938 X 2.686
201050

2

Input Gear Seal - Use Back to Back 1.938 X 2.686
201057

1

Front Output Shaft Seal 1.750 X 3.061
201027

2

Ford F & R Output Shaft Seal 1.875 X 3.061
201059

1

Rear Output Shaft Seal 2.125 X 2.750
301515

1

Input shaft Ball Bearing  
301523

1

Front Output Shaft Ball Bearing  
301515

1

Main shaft Ball Bearing  
301523

1

Rear Output Shaft Ball Bearing  
TRS-301645   Range Slider  
TRS-301530

1

Oil Pump Gear 5 teeth - 38 spline - 1/2" wide White Nylon
TRS301715   Differential Carrier (w/Cage & Bolts, w/o gears)  
TRS-HV-005

1

Drive Chain, 98 Pins, 3/8" Pitch, Rocker Pin 2.5" Wide - 49 Links
TRS-301997   Speedo Gear Red 7 Teeth  
 

 

Transfer Case Illustration click image to enlarge.

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np203_p2_th.jpg