DIAGNOSIS, MAINTENANCE, BASIC ADJUSTMENT

Chapter 3 Lab Manual Page 29

IDENTIFICATION

The quickest way to ID a Trans is by the shape of the oil pan (see Fig. 3-1).

For oil pan ID see pages 39 - 49 of your NAPA catalog.

To decipher tag #’s see page 27 - 38 of your NAPA catalog.

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DIAGNOSTICS Is the problem:

– Hydraulic, Mechanical, Electronic Or is the problem engine related?

– Poor engine performance– Low engine vacuum.

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FLUID CHECK

First Check Fluid Level.– Check dip stick for type of fluid.– Any special instructions.

Vehicle Level Normal operating temperature.

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FLUID CHANGES

A transmission service should include:– Changing oil filter,– Oilpan gasket,– Adjust Bands,– Adjust TV linkage or Cable,– Check Modulator,– Adjust Manual linkage.

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FLUID LEAKS

External leaks:– Front pump seal– Front pump O’ring– Cooler lines– Manual shaft seal– Speedometer driven gear and adapter– Oil pan gasket– Rear seal Page 38

Checking Vacuum

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MODULATOR

Modulator should hold vacuum for 1 minute with out leaking down.

No fluid should come from vacuum nipple.

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Manual Linkage

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The purpose of the manual linkage adjustment is to put the manual valve, shift indicator and detent in proper relationship.

COLUMN DETENT

Align column detent, valve body detent and shift indicator.

P R N D 2 1

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Manual Adjustment

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TV ADJUSTMENT

Adjust throttle cable to get WOT.

TV plunger must be bottomed out.

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