Copyright © 1996 General Motors Corp. 3–33
PREVENTIVE MAINTENANCE
PREVENTIVE MAINTENANCE
A. Overheating in all Ranges (cont’d)
Overheating in all ranges (cont’d) Broken parts in torque converter.†† Replace or repair torque converter
assembly. Refer to Paragraph
6–4.***
Aerated fluid. Adjust fluid to proper level. Check
for defective sealring at intake tube.
Check for defective input charging
pump. Refer to Paragraphs 3–4
through 3–10, 5–3g, 5–3i, 6–7, 7–8b,
and 7–10b.
Cooler flow loss due to internal
leakage.
Overhaul transmission.
J. Transmission Throws Transmission Fluid Out of Fill Tube and/or Breather
Transmission throws fluid out of fill
tube and/or breather
Dipstick loose. Tighten cap. Replace if necessary.
Fluid level too high. Drain to proper fluid level. Refer to
Paragraphs 3–4 through 3–10.
Fluid level too low. Fill to proper fluid level. Refer to
Paragraphs 3–4 through 3–10.
Vacuum modulator failed. Replace vacuum modulator.
Fill tube not vented or is plugged. Check for blockage and clean if nec-
essary.
Breather stopped up (clogged). Clean or replace breather. Refer to
Paragraph 3–11.
Water in transmission fluid. Drain and replace fluid. Refer to
Paragraphs 3–4 through 3–10.
Dipstick gasket worn. Replace gasket or dipstick.
Improper dipstick marking
(improper fluid level).
Replace dipstick. Refer to Paragraph
3–4.
†† Can also result in excessive fuel consumption.
*** Note: Except for AT 543 models, no repairs can be made because the torque converter assembly is closed and welded after assembly of the
internal parts.
Table 3–13. Troubleshooting Chart (cont’d)
Problem Probable Causes Suggested Remedies
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