Advance Adapters 50-0431 User Manual

ADVANCE ADAPTERS, INC. P/N: 50-0431

P.O. Box 247, 4320 Aerotech Center Way New Kit: (02/03)
Paso Robles, CA 93447 PAGE: 1 OF 5
Telephone: [phone] Fax: [phone] Page Rev. Date: 05-01-13

GM 4L60E TO NP231 TRANSFER CASES (21SPL)

upgrading to 87-95 23SPL.

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 51-0405 4L60E / UNIVERSAL ADAPTER

2. 1 51-6800 ADAPTER CASTING (Ref: 711168)

3. 1 52-9101 700R-4 SHAFT

4. 1 300619 RELUCTOR SENSOR

5. 1 716053 23 SPLINE 87-95 TC INPUT

6. 1 *716325A POCKET BEARING (INSTALLED IN 716053)

7. 1 716760 NP231 INPUT SEAL

8. 1 716079 22mm PLUG

9. 1 716072 RELUCTOR RING CLAMP RING

(One piece reluctor, bolt torque 10 ft-lbs.)

10. 1 716082 700R PLASTIC WASHER

11. 1 716511 O-RING (51-6800 CASTING)

12. 1 716517 GASKET, NP208 T/C

13. 1 716729 SEAL (NAT. #456057) (ADAPTER)

14. 6 720015 10mm FLAT WASHER (USE ON 10mm BOLTS)

15. 6 720037 10mm x 1.5mm x 35mm H.H.C.S. (INTO 4L60 CASE)

16. 6 720038 10mm LOCK WASHER (USE ON 10mm BOLTS)

17. 4 720046 S.H.C.S. 10mm-1.5 X 40mm LG. (51-6800 TO THE 51-0405)

18. 6 723701 NUT 3/8"-16 PLATED (USE ON STUDS)

19. 6 723704 3/8" LOCKWASHERS (USE ON STUDS)

20. 6 723711 STUD BOLT 3/8"-16 x 2" LG (TRANSFER CASE STUDS)

21. 2 723730 S.H.C.S. 3/8"-16 x 1-1/4" LG. (STUD REPLACEMENTS)

In 1996, GM produced a newer version of its electronically controlled 4L60E. This

4L60E transmission is 21-1/2" long, and has a removable bellhousing. It has

a hex bolt pattern on the output side of the transmission, similar to a

TH400.

OPTIONAL ITEMS:

Qty Part No. Description

1 716008 Crossmember mount

The kit which you have purchased was designed not only to adapt
the 4L60E to the NP231 case, but also to maintain the pulse

generator to run the computer. We have included a 700R4 shaft in

this kit to be installed in the transmission. Once installed in the

transmission, you may begin to assembly the pulse system on the

transmission. First is the reluctor ring. This clamp-on reluctor ring

fits over the stock governor gear on the supplied output shaft. It

creates 40 pulses for each revolution of the output shaft for the

drivetrain control module. We have provided two reluctor sensor

locations to choose from in the adapter. The hole not being used will need

to be plugged with the brass plug provided.

SPECIAL NOTE: The components packaged in this kit have been assembled and machined for specific types of conversions. Modifications to any of the
components will void any possible warranty or return privileges. If you do not fully understand the 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 vales, wiring diagrams and
other related equipment. These manuals are normally available at automotive dealerships and parts stores.

ADVANCE ADAPTERS, INC. P/N: 50-0431

P.O. Box 247, 4320 Aerotech Center Way New Kit: (02/03)
Paso Robles, CA 93447 PAGE: 2 OF 5
Telephone: [phone] Fax: [phone] Page Rev. Date: 05-01-13

GM 4L60E TO NP231 TRANSFER CASES (21SPL)

upgrading to 87-95 23SPL.

Pulse Generator Installation:

Slide the reluctor ring over the 4L60E shaft installed in the transmission. Push the ring

completely onto the shaft until it bottoms out. Lightly snug the set screws for a "dry run". Trial
fit the 51-0405 adapter plate onto the back of the 4L60E transmission using two of the supplied

bolts. With the adapter bolted on the back of the transmission, install the 300619 reluctor sensor

into the adapter casting. The 300619 sensor should line up over the teeth of the reluctor clamp.

(If the clamp-on ring is not completely bottomed out, this may cause a miss-alignment with the

sensor). When you have confirmed the correct location of the shaft, remove the adapter housing.

Make sure you do not disturb the position of the clamp on the shaft. With the clamp now exposed,

tighten the set screw on the clamp.

recommended on these set screws.

(One piece reluctor, bolt torque 10 ft-lbs.) Loctite is highly

You should now be ready for final installation of the 51-0405 casting. RTV Blue Silicone should be used to seal adapter
51-0405 to your 4L60E transmission. Use all of the supplied bolts for the casting and
torque according to factory specs. Next, screw the 300619 sensor completely into
the 51-0405 casting. Be careful not to force this sensor once it has contacted the
shaft. Slowly back the sensor out of the hole and with a feeler gauge. Check
the gap between the sensor and the reluctor ring. This gap should be around

0.010" to 0.012". Once 0.010" to 0.012" clearance is obtained, Loctite the
sensor into position.

You are now ready to bolt your conversion adapter to the 51-0405
kit. NOTE: On a few applications, customers have not

positioned the clamp in the correct position which has caused
interference with the input shaft in the transfer case. If you
try bolting the conversion adapter up to the 51-0405 and find
interference, the spud shaft may be hitting the clamp on the
reluctor.

ASSEMBLY PROCEDURES:

1. Trial fit the 51-6800 adapter on the already installed 51-0405 casting. Check to see that the castings seat flush against
each other. Use two of the supplied bolts to temporarily hold these together.

2. Trial fit the transfer case to the adapter and transmission. Check for spline engagement and shaft depth into the input
coupler of the transfer case. If the transfer case does not mate flush against the casting, DO NOT DRAW IT

TOGETHER WITH THE FASTENERS. SEVERE DAMAGE WILL OCCUR. This is not normally found when

replacing an AX15 manual transmission. If interference is detected, the output shaft must be shortened to a flush stickout
with reference to the casting. On Automatic Torqueflite 999 applications where the factory output shaft does not

protrude beyond the stock adapter, the will need shaft modifications. Cutting the shaft will require a cut off disc

to cut the outer edges, and a hacksaw to cut through the center. If you are unsure about cutting, please call us toll free
at 1-800 350-2223. If you do not have the ability to cut your shaft, a 1" spacer is available (Part No. 51-0404).

P/N 300619

A .010" - .012" GAP

SPECIAL NOTE: The components packaged in this kit have been assembled and machined for specific types of conversions. Modifications to any of the
components will void any possible warranty or return privileges. If you do not fully understand the 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 vales, wiring diagrams and
other related equipment. These manuals are normally available at automotive dealerships and parts stores.