CHRYSLER A604 TRANSFER GEAR CHANGES (32 DEGREE)

CHANGE: Introduced as a running change, late in the 1991 model year, Chrysler changed the helix angle of the teeth on the transfer gears to 32 degrees instead of the previous 27.5 degrees.

REASON: To reduce a whining concern while the vehicle was in motion. Find more obd2 scanner to do better on auto repair.

PARTS AFFECTED:
(1) TRANSFER GEARS – The helix angle of the teeth on both transfer gears changed from 27.5 degrees to 32 degrees.  The new design transfer gears can be easily identified by the removal of the washer recess area in the center of the gears. This was done to create more spline engagement, to accommodate higher torque engines.

(2) REAR PLANETARY CARRIER – The spline area of the output shaft was increased by 1/8″ to accommodate the increased spline area in the transfer gear.

(3) OUTPUT SHAFT BOLT – New output shaft bolt was introduced at the same time with a Locktite patch added to the thread area, and the bolt was cadium plated. The new design bolt has a 5/16″ head thickness instead of the previous 1/4″ head thickness. All of this was done for a more stable torque retention.

(4) TRANSFER SHAFT NUT – Added Lock-tite patch to the thread area and cadium plated for a more stable torque retention.

(5) TRANSFER GEAR COVER – Has an added dimple in the cover to accommodate the increased head thickness of the output shaft bolt.

INTERCHANGEABILITY:
Individually the new design parts listed above ARE NOT interchangeable with previous design level parts.  However, by using the new parts in kit form, a 1991 model transaxle can be upgraded to the new design 32 degree transfer gears.

The only kit available for 1989-1990 model transaxles is a special “Low Lead Crown” 27.5 degree Transfer Gear Service Package. This kit is the only way to reduce gear whine concerns on these models.  Some hot car tools like tacho pro universal and ELM327 Bluetooth may help you more.

SERVICE INFORMATION:
89-90 Models, Special “Low Lead Crown” Service Package
54/59 Tooth Gear Set (2.36 Overall Gear Ratio ONLY) ………………………………….. 4638737
1991 Models, 32 Degree Service Package
46/50 Tooth Gear Set (2.36/2.19 Overall Gear Ratio ONLY) …………………………… 4713139
1991 Models, 32 Degree Service Package
49/47 Tooth Gear Set (2.52 Overall Gear Ratio ONLY) ………………………………….. 4713140
50 Tooth Output Gear and Bearing ……………………………………………………………….. 4713141
46 Tooth Transfer Gear and Bearing …………………………………………………………….. 4713142
49 Tooth Transfer Gear and Bearing …………………………………………………………….. 4713143
47 Tooth Output Gear and Bearing ……………………………………………………………….. 4713144
Rear Planetary Carrier (New Design) ……………………………………………………………. 4713145
Output Gear Washer …………………………………………………………………………………… 6501832
Output Gear Bolt (New Design) …………………………………………………………………… 6503548
Transfer Gear Nut (New Design) ………………………………………………………………….. 6502611
Transfer Gear Washer …………………………………………………………………………………. 6501833
Transfer Gear Cover (New Design) ………………………………………………………………. 4567255

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MAZDA G4A-EL STACKED SHIFTS

COMPLAINT: Vehicles equipped with G4A-EL transmissions may exhibit early or “Stacked Shift’s” with Converter Clutch apply by 20 mph., after overhaul, without storing any trouble codes. Find more obd code readers for help?

CAUSE: The cause may be, a mismatched 1993 Reverse and Forward drum was installed into as 1987-92 vehicle. REASON: 1987-92 Reverse and Forward drums have 12 “Projections.”
1993 Reverse and Forward drums have 16 “Projections.” These “Projections” are picked up by the “Pulse Generator” converting drum or turbine speed into an A.C. current or frequency that is sent to the ECAT computer. When a 16 “Projection” drum is installed into an 1987-1992 vehicle, drum or turbine speed will automatically be faster and may change shift strategy. (See Figure 1).

CORRECTION: Refer to Figure 2 to identify model year and install the proper drum for your application.

STACKED SHIFTS 1

STACKED SHIFTS 2

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FORD AXOD – New 10 Checkball Pump And Gaskets

Make certain the correct number of checkballs are installed in their proper locations during the reassembly process. Use the transaxle model tag attached to the top of the converter housing, (See Figure I), for positive model identification. Refer to the following service information for the correct number of checkballs, and proper placement of the checkballs.

VALVE BODY CHECKBALL INFORMATION
The valve body has SEVEN (7) checkballs and the location of the check balls are the same for all models and all years. REFER TO FIGURE 2 FOR LOCATIONS

OIL PUMP  CHECKBALL INFORMATION
1986-1990 TAURUS/SABLE, 3.0L Engines, All Models 1989 CONTINENTAL, 3.8L Engines, Models PNA-AB, PNA-AB3 The oil pump body on these models have NINE (9) checkballs. REFER TO FIGURE 3 FOR LOCATIONS

1989 CONTINENTAL, 3.8L Engines, Models PNA-AB4
1990 CONTINENTAL, 3.8L Engines, All Models
1990 TAURUS/SABLE, 3.8L Engines, All Models
The oil pump body on these models have TEN (10) checkballs, and require new pump gaskets that are identified by a “Light Blue” stripe. REFER TO FIGURE 4 FOR LOCATIONS

SERVICE INFORMATION
CHECKBALLS (5 Per Package) ………………………………………………….. E7DZ-7E195-A
PUMP HOUSING TO PUMP SPACER GASKET (10 Ball) ………….. E90Y-7G331-A
PUMP SPACER TO VALVE BODY GASKET (10 Ball) ………………. E90Y-7A136-A
Figure 1: http://goo.gl/uUDVV
Figure 2: http://goo.gl/DAv4N
Figure 3: http://goo.gl/JFSUW

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THM 4L60 (700-R4) – NO 4TH GEAR

COMPLAINT: No 4th gear; 2nd and 4th pressure lower than line pressure. More obd2 scanner from http://www.obddeal.com.

CAUSE: The cause could be the cup plug missing from the servo feed passage in the valve body (See Figure 1). The cause may also be the bleed orifice cup plug missing from the case in the bottom of the 3-4 accumulator bore (See Figure 2).

CORRECTION: Install cup plug. OEM Part Number for bleed orifice cup plug is 8628864.

NO+4TH+GEAR+1.png

NO+4TH+GEAR+2.png