Advance Adapters 50-7906B User Manual

ADV ANCE ADAPTERS INC.

Fixed Yoke kit (S.Y.E. Kit)

Instruction Sheet

P/N: 50-7905 & 50-7906

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 51-7906 TAILHOUSING, DIECAST

2. 1 52-7905 SHAFT, MAIN OUTPUT

3. 1 300474 SEAL WASHER, REAR YOKE
4 1 300475 YOKE, C.V. REAR

5. 1 300476 NUT, REAR YOKE

6. 1 300480 SEAL WASHER, FRONT YOKE

7. 1 300625 RING GEAR, SPEED-O

8. 2 300627 SNAP RING, SPEED-O RING GEAR

9. 1 716075 PLUG FOR TAILHOUSING

10. 1 716076 SEAL WASHER FOR PLUG

11. 1 716318 BEARING, 207 OPEN BALL (No Snap Ring)

12. 1 716464 SNAP RING, 207 BEARING

13. 1 716465 RETAINER RING, MODE

14. 1 716751 SEAL, TAILHOUSING

P/N: 50-7906B

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 51-7906 TAILHOUSING, DIECAST

2. 1 52-7905 SHAFT, MAIN OUTPUT

3. 1 300474 SEAL WASHER, REAR YOKE
4 1 300475 YOKE, C.V. REAR

5. 1 300476 NUT, REAR YOKE

6. 1 300480 SEAL WASHER, FRONT YOKE

7. 1 300625 RING GEAR, SPEED-O

8. 2 300627 SNAP RING, SPEED-O RING GEAR

9. 1 716075 PLUG FOR TAILHOUSING

10. 1 716076 SEAL WASHER FOR PLUG

11. 1 716318 BEARING, 207 OPEN BALL (No Snap Ring)

12. 1 716464 SNAP RING, 207 BEARING

13. 1 716465 RETAINER RING, MODE

14. 1 716751 SEAL, TAILHOUSING

15. 1 113 BOX

ADV ANCE ADAPTERS INC. P/N: 50-7905, 50-7906 & 50-7906B

P.O. Box 247, 4320 Aerotech Center Way New Item: (12/98)
Paso Robles, CA 93447 PAGE 2 OF 12
Telephone: [phone] Fax: [phone] Page Rev. Date: 07-31-07

NP231 SHORT SHAFT "FIXED YOKE" KIT

INSTALLATION PROCEDURES:

Every effort has been made to make sure your kit fits and works right the first time. However, if you happen to
experience a problem with your kit, please contact us by our toll free
technical assistance line at [phone], Monday through Friday
8:00 a.m. to 4:00 p.m. PST.

The installation of this kit requires you to nearly disassemble
the entire transfer case. If your transfer case is in need
of a rebuild, now is the perfect time to do it. To install this
kit, it is easier to remove your transfer case and set it on
end upon a workbench, but it is not necessary.

Here are a couple of points to keep in mind that will make the
installation much easier if you've never disassembled a New
Process transfer case:

1. Keep all bolts, nuts, washers, etc. separated into groups as you remove
them. Make sure you keep them in a labeled container that indicates what part of the transfer case they came from.

2. Keep all small parts in separate containers and label as to location and origin.

3. Make sure you have plenty of time and a clean, spacious area to perform the installation.

THINGS TO CONSIDER BEFORE YOU BEGIN:

1. This kit is shipped with a rear 1310 series C.V. type yoke. You will need a C.V. equipped driveshaft. We do also
offer other yoke options. P/N 300369 is a 1330CV yoke that uses the same seal as the 1310CV yoke provided
in this kit. P/N 716295 - 1310 non CV yoke, P/N 300472 - 1350 non CV yoke, P/N 300473 - 1410 non CV yoke,
P/N 300470 - 1300 series flange yoke, and P/N 300471 - 1410 non CV flange yoke. These yokes can also be used
on our fixed yoke kit as long as the tailhousing seal is changed. The seal required is our P/N 716755 or a CR seal
P/N 21061.

2. Medium strength threadlocker is recommended on all threaded fasteners.

3. A sealant such as RTV, (like the OEM sealant) is needed and is available from your local Jeep/Dodge dealer.
P/N 82300234.

4. The shift rail on the New Process transfer case may require shortening. Please refer to Page 9 of these instructions
to verify. If your transfer case requires this modification, then it can be done as described on Page 9 or the rail
can be removed from the case and modified while the case is disassembled. If the rail is going to be removed
and modified, please take note to how this mechanism is installed into the case assembly.

SPECIAL NOTE: The components packaged in this kit have been assembled and machined for specific type of conversions. Modifications to any of the
components will void any possible warranty or return privileges. If you do not fully understand modifications or changes that will be required to complete your conversion,
we strongly recommend that you contact our sales department for more information. This instruction sheet is only to be used for the assembly of Advance Adapter
components. We recommend that a service manual pertaining to your vehicle be obtained for specific torque values, wiring diagrams and other related equipment.
These manuals are normally available at automotive dealerships and parts stores.

ADV ANCE ADAPTERS INC. P/N: 50-7905, 50-7906 & 50-7906B

P.O. Box 247, 4320 Aerotech Center Way New Item: (12/98)
Paso Robles, CA 93447 PAGE 3 OF 12
Telephone: [phone] Fax: [phone] Page Rev. Date: 07-31-07

NP231 SHORT SHAFT "FIXED YOKE" KIT

DRIVE SHAFT MODIFICATION:

This job should be performed by a local driveline repair shop capable of balancing the finished assembly. (Use a C.V.
joint & long slip spline style shaft assembly.)

With the vehicle finished and on the ground, measure a straight line between the transfer case output yoke and the rear
pinion yoke center mating flanges. (Fig. A)

(Fig. A)

For proper C.V. type drive shaft operation, the rear differential should be pointed at the transfer case output yoke under
normal driving load.

If install is performed on jack stands, make sure you have supported the vehicle well!

Place the transfer case range selector in the 4L position.
Remove front & rear drive shafts and begin at the disassembly procedures. (Step 1, Fig. 1)

SPECIAL NOTE: The components packaged in this kit have been assembled and machined for specific type of conversions. Modifications to any of the
components will void any possible warranty or return privileges. If you do not fully understand modifications or changes that will be required to complete your conversion,
we strongly recommend that you contact our sales department for more information. This instruction sheet is only to be used for the assembly of Advance Adapter
components. We recommend that a service manual pertaining to your vehicle be obtained for specific torque values, wiring diagrams and other related equipment.
These manuals are normally available at automotive dealerships and parts stores.

ADV ANCE ADAPTERS INC. P/N: 50-7905, 50-7906 & 50-7906B

P.O. Box 247, 4320 Aerotech Center Way New Item: (12/98)
Paso Robles, CA 93447 PAGE 4 OF 12
Telephone: [phone] Fax: [phone] Page Rev. Date: 07-31-07

NP231 SHORT SHAFT "FIXED YOKE" KIT

DISASSEMBLY

(Fig. 1) Yoke Nut Removal

(1) Remove Speed-o-drive.
(2) Remove front yoke nut.

(a) Move range lever to 4L position.
(b) Remove front yoke nut with 1-1/8" socket using an impact

wrench. (Fig. 1)

(3) Remove yoke.

(Discard seal washer).

(4) Remove selector lever. (Fig. 2)

Note: If difficult, use a puller.

(Fig. 3) Slinger Removed / Harmonic Dampener

(5) Remove the output shaft boot. Spread band clamps with a Awl.

Slide boot off.

(6) Remove slinger (this one is tough)! Good thing you won't need

this later. (Fig. 3)

(6a) On newer transfer cases, Jeep used a harmonic dampener. The

dampener has 3 tapped metric holes (6mm-1.00). By installing
bolts into these holes, they will go through the dampener and
press against the stock tailhousing, pressing the harmonic
dampener off the output shaft.

(7) Remove stop spacer & snap ring. (Fig. 4)

(Fig. 2) Range Selector Removal

SPECIAL NOTE: The components packaged in this kit have been assembled and machined for specific type of conversions. Modifications to any of the
components will void any possible warranty or return privileges. If you do not fully understand modifications or changes that will be required to complete your conversion,
we strongly recommend that you contact our sales department for more information. This instruction sheet is only to be used for the assembly of Advance Adapter
components. We recommend that a service manual pertaining to your vehicle be obtained for specific torque values, wiring diagrams and other related equipment.
These manuals are normally available at automotive dealerships and parts stores.

(Fig. 4) Stop Spacer & Snap Ring Removal