Advance Adapters 50-6102 User Manual

ADVANCE ADAPTERS INC. P/N: 50-6102

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711061-NS
Paso Robles, CA 93447 PAGE 1 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 10-24-14

FORD NP435 4 SPEED TRANSMISSION TO

JEEP DANA 18/20

KIT CONSISTS OF:

No. Qty Part No. Description

1 1 51-7510 FORD NP435 4SP ADAPTER CASTING
2 1 51-7700 JEEP DANA20/T18 4-SP CASTING
3 **1** 52-3800 Modified NP435 X DANA 300-23 MAIN SHAFT

52-3800 must be shortened 1" on the 23Spline end before shipping.

4 1 52-8600 JEEP T5 TO DANA 18/20 T/C-23T
5 1 725040 STUD BO L T 1/2"-13 x 2 "
6 1 716512 GASKET (NP435)(T18)
7 1 716517 GASKET-N.P.208 TRANSFER CASE
8 1 716568 T.C. GASKET/JEEP&TOY L/C
9 1 716700 SEAL-TH400/TH350 TO TLC AND 18/20 ADAPTERS
10 6 723704 3/8 LOCKWASHER
11 4 725004 HEX NUT 1/2"-13 PLATED
12 6 723722 H.H.C.S. 3/8"-16 X 1-1/4" (GR5)
13 1 728701 NUT-NYLON LOCK 7/8"-16
14 1 BG Buyers Guide

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 case 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
transmission will have an 8-1/2" x 6-1/4" bellhousing pattern with a bellhousing pilot diameter of 4.848". The assembled
length of the transmission and adapter will vary depending on which installation you are doing.

OPTIONAL ITEMS:

Qty Part No. Description

1 716302 SEALED BEARING
1 716001 or
1 716002 BEARING RETAINER
1 716021 TRANSMISSION

SUPPORT

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. When bolting the adapter to the main transmission case, you must use two studs in the lower two
holes of the adapter. A slight modification may be necessary to obtain the proper clearance around the lower bearing cover
of the stock transmission. We have come across two different bolt patterns on the back side of the transmission case.
The difference is between 2-wheel and 4-wheel drive applications. If the transmission was originally used in a 4-wheel
drive vehicle, the lower two holes will be spread further apart. If the transmission was originally used in a 2-wheel drive
vehicle, then the lower two holes will be in line with the upper two holes.

The kit is only available for 1-3/8"-6 spline gear sizes. If you are replacing a T14 Jeep 3 speed or a Scout automatic, you
will need to purchase a new output gear for this conversion.

If you are using a Dana 18 twin stick transfer case, you will need to grind some material from the rear corner of the NP435.
The casting is thick, so no strength will be lost.

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: 50-6102

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711061-NS
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 04-04-13

FORD NP435 4 SPEED TRANSMISSION TO

JEEP DANA 18/20

DVANCE

DAPTERS

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.