Advance Adapters 50-6902 User Manual

ADVANCE ADAPTERS INC. P/N: 50-6902

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711069-400
Paso Robles, CA 93447 PAGE 1 OF 2
Telephone: [phone] Fax: [phone] Page Rev. Date: 02-01-06

GM 700R-4 REPLACING TH400 1971-79

NEW PROCESS 205/203

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 51-6901 ADAPTER PLATE (Ref: 711169-400)

2. 1 52-6904 OUTPUT SHAFT (Ref: 711369-T400)

3. 1 716082 700R PLASTIC WASHER

4. 1 716510 TH400 GASKET

5. 1 716511 GASKET "O"-RING

6. 4 720046 S.H.C.S. 10mm-1.5 TH x 40mm (Metric)

GM 700R-4 4 SPEED AUTOMATIC:

The General Motors 700R-4 has a case length of 23-3/8", and is available in two different engine to transmission bolt
patterns. The case is available with a Chevy bolt pattern that has the top two holes 8-1/4" apart or in a Buick bolt pattern
that have the top two holes 7" apart. The rear side of the transmission case should have a square bolt pattern that uses
4 bolts. You must make sure the proper shaft has been installed into the transmission for use with our transfer case kit.
The speedometer gear is normally located in the tailhousing, but when adapting it to the transfer case, the location will
change to the back side of the transfer case. The rear transmission support is located in the main case just forward of
the tailhousing connection. This can be used for supporting the crossmember on some installations, but most of our kits
provide support on the new adapter housing.

Our output shaft will protrude 1/2" beyond the face of the original GM adapter housing. When installing the new transfer
case adapter, make sure that the input gear in the transfer case and the output shaft do not bottom out. There are some
variations to the GM input gears that may require modifying of the new output shaft. We have found on occasion that
a transmission output shaft may be slightly longer than we have allowed for; and when coupling into the NP205, you might
find a small amount of interference The adapter housing and output shaft must be assembled to the transmission without
interference.
shaft can be done with the new output shaft installed in the transmission case. Caution should be given to these
modifications. If you are uncertain as to the exact cutoff location, please contact Advance Adapters toll free if assistance
is needed [phone].

DO NOT FORCE THE NEW TAILHOUSING ONTO THE TRANSMISSIONS.

NOTE: If using this kit in conjunction
with our 50-0405 adapter, the reluctor
ring will require to be modified. The
inner lip of the reluctor must be opened
up to fit over the 32 spline shaft.

The modifications to the output

When assembling the adapter housing to the transmission case, we have provided you with a new square type "O" ring
seal to prevent fluid leakage. This seal is a stock GM item that is used on all 700R-4 installations. On some installations,
a slight pan modification may be required for clearance of the front Universal yoke.

The assembled length of the new transmission, adapter plate and original TH400 spacer housing will be exactly the same
length as the original TH400 assembly so no driveline modifications will be required.

INSTALLATION:

1. Install the output shaft into the 700R-4. This should be done by an experienced transmission tech.

2. Slip the o-ring over the adapter and install the 4 metric socket head screws to secure the adapter to the 700R-4.

3. Apply a small amount of silicone around the mating surface to the aluminum adapter. This will seal the stock TH400
adapter, and prevent fluid leakage.

4. Secure the stock housing to the adapter using the six factory TH400 bolts. The NP205/203 will now bolt to the stock
adapter using the stock bolts and the provided gasket.

5. Loctite all fasteners and use silicone sealant on all gaskets.

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: 50-6902

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711069-400
Paso Robles, CA 93447 PAGE 2 OF 2
Telephone: [phone] Fax: [phone] Page Rev. Date: 01-14-05

GM 700R-4 REPLACING TH400 1971-79

NEW PROCESS 205/203

NOTE:

The drawing above shows the NP205 adapter
housing. When using a NP203 transfer case the
stock adapter is shorter which requires the output
shaft to be shortened. The transmission output
shaft should stick out a 1/4" past the adapters when
bolted on the transmission.

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.