NP271 disassembley instructions
- Thread starter okie18
- Start date
Pony_Kegger
New member
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- Jul 16, 2009
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- 369
COMPANION FLANGE AND EXTENSION HOUSING
1. Install two bolts 180° apart into the front output shaft companion flange.
2. Place holder (1) over the bolts (2) and against the companion flange.
3. Remove and discard the front companion flange nut.
4. Remove the companion flange from the front output shaft. It may be necessary to use Pinion Flange Remover 8992 to remove the companion flange.
5. Use a suitable chisel or pry tool to remove the rear extension housing (1) dust boot (2).
6. Use a suitable chisel or pry tool to remove the rear extension housing seal.
7. Remove rear extension (1) bolts (2).
8. Remove rear extension housing (2) from the rear case half. Tap extension once or twice with a plastic mallet to break sealer bead and loosen it.
OIL PUMP AND REAR CASE
1. Disengage the oil pump pick-up tube (2) from the oil pump (1).
NOTE: The oil pump pick-up tube seals to the oil pump with an o-ring. Verify that the o-ring was removed with the tube and is in good condition. Replace the o-ring if necessary.
2. Remove the oil pump (3) from the rear output shaft (2).
3. Remove rear case (2)-to-front case (1) bolts (3).
4. Remove the rear output shaft bearing inner snap-ring (3) from the output shaft (1) using suitable snap-ring pliers.
5. Remove the rear output shaft bearing inner snap-ring (3) from the output shaft (1).
6. Loosen rear case (2) with pry tool to break sealer bead. Insert tool at each end of case .
7. Unseat rear case from alignment dowels.
8. Remove the rear case (2) from the front case (1).
FRONT OUTPUT SHAFT AND DRIVE CHAIN
1. Remove the oil pick-up tube (3) and screen (2) from the front case half (1).
2. Remove the shift rail spring (2) from the shift rail (1).
3. Remove the front output shaft (1) drive sprocket (2) retaining ring (3).
4. Remove the rear output shaft (1) drive sprocket (2) retaining ring (3).
5. Pull front sprocket (3), rear sprocket, and chain (2) upward until clear of the front and rear output shaft sprocket splines.
6. Remove chain and sprockets as an assembly.
SHIFT FORKS AND MAINSHAFT
1. Shift transfer case into NEUTRAL.
2. Remove nut that retains the shift lever to sector shaft. Then remove shift lever (3) and spacer from the shaft.
3. Remove the sector support (2) with Socket 9033 .
4. Remove the transfer case position sensor or switch (2) from the front case half (1).
5. Loosen detent plug (2).
6. Remove detent plug (2), spring (3), and plunger (4). Note that the plug has an O-ring seal. Remove and discard this seal.
7. Using a screw mounted in a slide hammer, remove the front output shaft seal.
8. Remove the front output shaft snap-ring (2).
9. Remove front output shaft (2) from bearing in the front case (1).
10. Pull mainshaft assembly (2) out of input gear, mode sleeve, and case.
11. Remove mode fork (2), mode sleeve (3), and shift rail (1) as assembly . Note which way the sleeve fits in the fork (long side of sleeve goes to front or the points on the sleeve teeth go to the rear of case).
12. Remove range fork (2) and hub (1) as an assembly. Note fork position for installation reference.
13. Remove shift sector (1).
MAINSHAFT
1. Remove the clutch gear (2) from the output shaft (1).
2. Remove the mode hub retaining ring (3) from the mainshaft (1).
3. Remove the mode hub (2) from the mainshaft (1).
4. Remove the drive sprocket drive hub (2) from the mainshaft.
INPUT AND PLANETARY GEAR
1. Remove input gear seal with suitable screw and slide hammer.
2. Remove input gear retaining ring (2) with heavy duty snap-ring pliers.
3. Place front case in horizontal position. Then remove input gear and low range gear as an assembly (2). Tap gear out of bearing with plastic mallet, if necessary.
4. Remove snap-ring (2) that retains input gear in the low range gear (1).
5. Remove retainer (2).
6. Remove front thrust plate (2) from the input gear (1).
7. Remove input gear (1) from the low range planetary (2).
8. Remove bottom tabbed thrust washer (2) from low range planetary (1).
1. Install two bolts 180° apart into the front output shaft companion flange.
2. Place holder (1) over the bolts (2) and against the companion flange.
3. Remove and discard the front companion flange nut.
4. Remove the companion flange from the front output shaft. It may be necessary to use Pinion Flange Remover 8992 to remove the companion flange.
5. Use a suitable chisel or pry tool to remove the rear extension housing (1) dust boot (2).
6. Use a suitable chisel or pry tool to remove the rear extension housing seal.
7. Remove rear extension (1) bolts (2).
8. Remove rear extension housing (2) from the rear case half. Tap extension once or twice with a plastic mallet to break sealer bead and loosen it.
OIL PUMP AND REAR CASE
1. Disengage the oil pump pick-up tube (2) from the oil pump (1).
NOTE: The oil pump pick-up tube seals to the oil pump with an o-ring. Verify that the o-ring was removed with the tube and is in good condition. Replace the o-ring if necessary.
2. Remove the oil pump (3) from the rear output shaft (2).
3. Remove rear case (2)-to-front case (1) bolts (3).
4. Remove the rear output shaft bearing inner snap-ring (3) from the output shaft (1) using suitable snap-ring pliers.
5. Remove the rear output shaft bearing inner snap-ring (3) from the output shaft (1).
6. Loosen rear case (2) with pry tool to break sealer bead. Insert tool at each end of case .
7. Unseat rear case from alignment dowels.
8. Remove the rear case (2) from the front case (1).
FRONT OUTPUT SHAFT AND DRIVE CHAIN
1. Remove the oil pick-up tube (3) and screen (2) from the front case half (1).
2. Remove the shift rail spring (2) from the shift rail (1).
3. Remove the front output shaft (1) drive sprocket (2) retaining ring (3).
4. Remove the rear output shaft (1) drive sprocket (2) retaining ring (3).
5. Pull front sprocket (3), rear sprocket, and chain (2) upward until clear of the front and rear output shaft sprocket splines.
6. Remove chain and sprockets as an assembly.
SHIFT FORKS AND MAINSHAFT
1. Shift transfer case into NEUTRAL.
2. Remove nut that retains the shift lever to sector shaft. Then remove shift lever (3) and spacer from the shaft.
3. Remove the sector support (2) with Socket 9033 .
4. Remove the transfer case position sensor or switch (2) from the front case half (1).
5. Loosen detent plug (2).
6. Remove detent plug (2), spring (3), and plunger (4). Note that the plug has an O-ring seal. Remove and discard this seal.
7. Using a screw mounted in a slide hammer, remove the front output shaft seal.
8. Remove the front output shaft snap-ring (2).
9. Remove front output shaft (2) from bearing in the front case (1).
10. Pull mainshaft assembly (2) out of input gear, mode sleeve, and case.
11. Remove mode fork (2), mode sleeve (3), and shift rail (1) as assembly . Note which way the sleeve fits in the fork (long side of sleeve goes to front or the points on the sleeve teeth go to the rear of case).
12. Remove range fork (2) and hub (1) as an assembly. Note fork position for installation reference.
13. Remove shift sector (1).
MAINSHAFT
1. Remove the clutch gear (2) from the output shaft (1).
2. Remove the mode hub retaining ring (3) from the mainshaft (1).
3. Remove the mode hub (2) from the mainshaft (1).
4. Remove the drive sprocket drive hub (2) from the mainshaft.
INPUT AND PLANETARY GEAR
1. Remove input gear seal with suitable screw and slide hammer.
2. Remove input gear retaining ring (2) with heavy duty snap-ring pliers.
3. Place front case in horizontal position. Then remove input gear and low range gear as an assembly (2). Tap gear out of bearing with plastic mallet, if necessary.
4. Remove snap-ring (2) that retains input gear in the low range gear (1).
5. Remove retainer (2).
6. Remove front thrust plate (2) from the input gear (1).
7. Remove input gear (1) from the low range planetary (2).
8. Remove bottom tabbed thrust washer (2) from low range planetary (1).
SKYNYRD
"Drunkard"
- Joined
- May 14, 2007
- Messages
- 5,668
This never works for me cause I end up breaking things! I go with the German torque spec! Gouden Tieght!
4x4dually
Moderator
- Joined
- Jan 22, 2007
- Messages
- 31,951
That is my normal mode of operation....but that makes re-assembly a b!tch. LOL
okie18
New member
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- Jan 30, 2009
- Messages
- 996
Thanks there Pony.
The rest of ya are some bored bastards sounds like it :lolly:
Found this that margus put up for the word impaired
[ame="http://s944.photobucket.com/user/ddcummins/media/NP271/T-caseinstall003.jpg.html?sort=6&o=0"]001 Photo by ddcummins | Photobucket[/ame]
The rest of ya are some bored bastards sounds like it :lolly:
Found this that margus put up for the word impaired
[ame="http://s944.photobucket.com/user/ddcummins/media/NP271/T-caseinstall003.jpg.html?sort=6&o=0"]001 Photo by ddcummins | Photobucket[/ame]
Those be ford parts. Just take it apart and put it back exactly like it came apart but with new parts where needed, it's how I do it!
Last edited:
okie18
New member
- Joined
- Jan 30, 2009
- Messages
- 996
Just the input seal from what I gather.
Yeah, I know who your talking about lol :Cheer:
Mopar1973
New member
- Joined
- May 9, 2012
- Messages
- 759
Add beer and re-assembly will come naturally :hehe: