NP 203
05-16-2013, 03:47 AM
#1
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NP 203
I took my tranny out of my 76 W100 to be rebuilt and while I have my transfer case out is there something I should do to it? How do I check chain stretch? Any thing else while its out?
05-16-2013, 03:21 PM
#2
Admin
Here is what I have
1. IndexNumber Part Description
1 Adapter
2 Input Drive GearPilot Bearings
3 Range SelectorSliding Clutch
4 Range SelectorHousing
5 Low speed GearBushing
6 Lowe Speed Gear
7 Thrust Washer &Locating Pin
8 Gasket
9 Input Bearing
10 Input Bearing
11 Input BearingRetaining Ring
12 Input BearingRetaining Ring
13 Thrust Washer
14 IntermediateHousing
15 Drive ShaftSprocket
16 Gasket
17 Sliding Lock Clutch
18 DifferentialHousing
19 Rear Output FrontBearing
20 O Ring
21 Vent
22 Oil Seal
23 Oil Seal Vent
24 Oil Pump
25 Speedometer DriveGear
26 Rear Output RearBearing
27 Rear Output ShaftHousing
28 Rear Output Shaft
29 Rear Output Washer
30 Rear Output Nut
31 Rear Output RubberWasher
32 Rear Output Yoke
33 Rear Output BearingOil Seal
34 Shim Pack
35 Input Shaft O RingSeal
36 Input Shaft RollerBearings
37 DifferentialCarrier Assembly
38 Spring Cup Washer
39 Lockout ClutchSpring
40 Drive ShaftSprocket Rear Retaining Ring
41 Drive ShaftSprocket Front Retaining Ring
42 Front Output RearBearing Cover
43 Front Output RearBearing
44 Front Output DriveSprocket
45 Front Output RearBearing Cover Gasket
46 Magnet
47 Drive Chain
48 Front OutputBearing Retainer Gasket
49 Front OutputBearing Outer Retaining Ring
50 Front OutputBearing
51 Front Output ShaftSeal
52 Front OutputBearing Retainer
53 Rubber Spline Seal
54 Front Output Washer
55 Front Output Nut
56 Front Output Yoke
57 Countergear
58 Countergear Spacers& Bearings
59 Counter Gear Shaft
60 Countergear ThrustWasher
61 Adapter to SelectorHousing Gasket
62 Input BearingRetainer Gasket
63 Input Bearing OuterRing
64 Input Gear Bearing
65 Input Gear Seals
66 Input BearingRetaining Ring
67 Input Gear
68 Input Gear BearingRetainer
05-16-2013, 03:28 PM
#4
Admin
Your best bet is to buy a dodge service manual though as that will give you all the info that you need. I've heard that Hayes and Mitchell (sp?) are pretty good as well.
I know that most if not all NP203 t-cases are full time 4wd. There are part time kits out there that give you more options as far as 2wd and 4wd goes and can help a little with better mileage. I did this with a full time t-case in my j10 and it was something I should have done right from them beginning.
I know that most if not all NP203 t-cases are full time 4wd. There are part time kits out there that give you more options as far as 2wd and 4wd goes and can help a little with better mileage. I did this with a full time t-case in my j10 and it was something I should have done right from them beginning.
05-17-2013, 05:42 AM
#8
Mopar Lover
that full time 4x4 to 4x2 par time was a great kit according to my father who i assisted on a install on his gmc p.u. it was a "warn" brand kit.
that case has a few parts in it just, the tear down and measuring of all the parts will take hours of fun and enjoyment...
that case has a few parts in it just, the tear down and measuring of all the parts will take hours of fun and enjoyment...
05-19-2013, 01:46 AM
#9
Admin
With the t-case being full time 4wd, there is a differential in it. If you do go into it, I strongly suggest installing wither Warn's or Mile Marker's part time conversion kit. Or you could swap it out for a NP205 which is all gear driven but the low range is only 2:1.
Of course....... since you already have the NP203, you could make a doubler with it and a NP205. You'll need to have your driveshafts modified, and have another set of sticks in the cab...... but...... come on..... its a doubler!
Of course....... since you already have the NP203, you could make a doubler with it and a NP205. You'll need to have your driveshafts modified, and have another set of sticks in the cab...... but...... come on..... its a doubler!
05-19-2013, 05:57 AM
#10
Mopar Lover
With the t-case being full time 4wd, there is a differential in it. If you do go into it, I strongly suggest installing wither Warn's or Mile Marker's part time conversion kit. Or you could swap it out for a NP205 which is all gear driven but the low range is only 2:1.
Of course....... since you already have the NP203, you could make a doubler with it and a NP205. You'll need to have your driveshafts modified, and have another set of sticks in the cab...... but...... come on..... its a doubler!
Of course....... since you already have the NP203, you could make a doubler with it and a NP205. You'll need to have your driveshafts modified, and have another set of sticks in the cab...... but...... come on..... its a doubler!
05-29-2013, 10:20 AM
#11
The NP205’s gear ratio is 1.96:1--the 203 is 2:1, a better off-road ratio, but not by much.
The 2wd kit by mile marker is a great modification, though don’t be too disappointed when you only see about one more mpg.
The 203 is heavy but it’s about as beefy as it gets. The most common cause of failure is INCORRECT LUBRICATION. The 203 doesn’t use ATF or gear oil. Here is an article I wrote about this awesome case:
http://voices.yahoo.com/the-process-...54.html?cat=27
The 2wd kit by mile marker is a great modification, though don’t be too disappointed when you only see about one more mpg.
The 203 is heavy but it’s about as beefy as it gets. The most common cause of failure is INCORRECT LUBRICATION. The 203 doesn’t use ATF or gear oil. Here is an article I wrote about this awesome case:
http://voices.yahoo.com/the-process-...54.html?cat=27
