Advance Adapters 50-3901 User Manual

ADVANCE ADAPTERS INC. P/N: 50-3901

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711039-23
Paso Robles, CA 93447 PAGE 1 OF 2
Telephone: [phone] Fax: [phone] Page Rev. Date: 8-27-12

FORD NP435 4SPD TRANSMISSION

TO NP 23-SPLINES TRANSFER CASE

KIT CONSISTS OF:

No. Qty Part No. Description

1 1 51-3800 NP 435 TO JEEP DANA 300 ADAP.
2 1 51-6910 SPACER ADAPTER/GM CIR.6 NP205
3 1 52-3901 NP435/NP207 MAIN SHAFT 23SPL.
4 1 715545 NV3550 X NP T/C LINKAGE
5 1 716512 GASKET (NP435)(T18)
6 2 716517 GASKET-N.P.208 TRANSFER CASE
7 1 716738 SEAL-DUAL LIP NP231 T/C
8 6 723701 NUT 3/8"-16 PLATED GRD 5
9 3 723712 STUD BOLT 3/8"-16 X 3-1/2"
10 3 723716 STUD BOLT 3/8"-16 X 4"
11 4 725004 HEX NUT 1/2"-13 PLATED
12 4 725038 STUD BOLT 1/2"-13 X 1.50 LG

FORD NEW PROCESS NP435 4 SPEED

The NP435 transmission can be identified by a case length of 10-3/4" and a case casting number of C95711, C96391,
or C13894. The aluminum shift cover has a casting number of C11240, C97233 or C994569. The P.T.O. opening
is on the right hand side at center of the case and the shift cover is mounted to the top of the case with 8 bolts. The
new shaft furnished with this kit must be carefully compared to the original shaft removed from your transmission. The
NP435 transmission required for this kit are from Ford F100, F200 & F300 1 ton trucks. The front bolt pattern on the
Ford transmissions will have an 8-1/2" x 6-1/4" bellhousing pattern with a bellhousing pilot diameter of 4.848".

When assembling the gears onto the new main shaft, make sure that all gears have the proper end clearance required
for oiling. Make sure that all transmission assembly work is done by a competent mechanic. All surfaces must use
gaskets to prevent oil leakage. Please refer to a transmission manual for proper tolerances for this transmission when
installing the new main shaft.

OPTIONAL ITEMS:

Qty Part No. Description

When bolting the adapter to the main transmission case, you must use four studs. A slight modification may be
necessary to obtain the proper clearance around the lower bearing cover of the stock transmission. The bolt pattern
of the New Process transmission may vary depending on if the original use was in a 2WD or 4WD vehicle.

With the adapter and transmission assembled, you are now ready to bolt the transfer case into position. We recommend
gasketing and silicone, since (in some applications) the seal cannot be used.

When this transmission is going to be used with an AMC 6 cylinder or V8 engine, you must use Jeep bellhousing No.
8133951 and Advance Adapter pilot bushing P/N 716156. The clutch disc should be changed to a 10-1/2" Centerforce
disc, AA P/N 384180.

This adapter kit is supplied for New Process transfer cases with 23 splines.

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.

ADVANCE ADAPTERS INC. P/N: 50-3901

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711039-23
Paso Robles, CA 93447 PAGE 2 OF 2
Telephone: [phone] Fax: [phone] Page Rev. Date: 08-27-12

FORD NP435 4SPD TRANSMISSION

TO NP 23-SPLINES TRANSFER CASE

DVANCE

DAPTERS

51-3800

NOTE: Advance Adapters machines the new output shaft to the same specifications of your stock main shaft.

However, every so often we have had customers inform us of a problem with the rear snap ring grove not being
wide enough. This grove is in the same location as the stock NP435 shaft. We have found that New Process
has had different thicknesses of snap rings through the years. If your snap ring will not fit into the snap ring
grove once the rear bearing is installed, the easiest fix is to sand the snap ring thinner until it fits. If you
do this, you should put the side of the snap ring that has not been sanded

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.

towards the bearing.