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

Some FAQ about car diagnostic tool

Some FAQ about car diagnostic tool

Question: Why is there no character in the printed paper?
Answer: The paper is mounted reversely. Please take out the paper and mount it again. See the section “Printer Operation” in the User’s Manual.

Question: Why can’t I input data after activating Soft Keyboard?
Answer: The position where the cursor lies can’t be edited. Or you have not activated the 0cursor on the input position. Use the stylus to click the part to edit. When the cursor twinkles, you can input the data.

Question: What should I do if I am not able to switch from Active Taskbar to the running application interface?
Answer: Please close interfaces related to the application, such as the Help or Detail.

Question: Why does the saved data disappear?
Answer: There are two possible causes:
1. Your CF card is damaged. It is necessary to make a new CF card.
2. You’ve changed language and the data is related to language. You may find the data after switching back to the former language.

Question: What can I do when the screen is confused?
Answer: Please quit the current application (interface), and run it again. If the problem still exists, please restart the system.

Question: How to know what applications (interfaces) are opened.
Answer: Click the active taskbar icon, then the pop-up list will display the applications (interfaces) opened.

Question: Why can’t I do operation in current interface?
Answer: There are two possible causes:
1. Your current interface has exited illegally. In this situation, you may not see the name of the application (interface) in the pop-up list when you click the active taskbar icon.
2. The system is busy, please wait patiently, or click the active taskbar icon to switch to another application.

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