Advance Adapters 50-0100 - Manual (Page 2)

MUNCIE 4-SPD TRANSMISSION TO
JEEP & SCOUT DANA 18/20
ADVANCE ADAPTERS INC. P/N: 50-0100
P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711001
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 05-14-14
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.
MUNCIE 4 SPEED 1963-1974
This transmission can be identified by an aluminum case that is 10" long and a side cover having 7 bolts. The reverse shift lever
will be coming out of the aluminum tailhousing. The front bearing retainer will have a diameter of 4.686" which will require the
transmission to be used with car-type bellhousings.
This adapter kit is for the General Motors Muncie 4 speed transmission. The new shaft included with this adapter will fit all models
from 1963 to 1974. The only exception is that in 1963, the first gear main shaft design was changed so first gear rode directly on
the main shaft. If your transmission is a 1963, then you will need to purchase a new first gear and first gear bushing. The adapter
housing is a direct copy of the original tailhousing that your transmission was equipped with. You will need to disassemble the
shift lever shaft, steel ball and spring for re-assembly into the new adapter. The original taper pin must be reinstalled to hold the
reverse gear shaft in position. A new seal has been provided to prevent leakage out of the reverse gear shaft. The seal must be
installed with the open side towards the transmission.
The total overall length of the transmission and adapter will be longer than your original transmission. Most conversions will
require drive shaft modifications The adapter has provisions for mounting an optional cross member mount as illustrated.
Depending on the exact vehicle that this transmission is being installed into, you may require modifications to the clutch linkage,
overdrive shifter bracket and transfer case control linkage.
The adapter is set up for use with a Hurst competition Plus shifter that can be bolted onto the new casting by using shifter bracket
No. 715501. This bracket will accept all Hurst shifters. Special shifter linkage will be required since the shift tower location is so
much further forward than on two wheel drive installations. Advance Adapters offers two different rod kits for use with this
transmission. The rod kits are #715625 for transmissions that have studs on the shift levers and #715626 for transmissions that
have female threads.
Gear Ratios:
First
Second Third Fourth
2:54 1:88 1:46 1:00
2:20 1:64 1:27 1:00