Copyright © 1998 General Motors Corp. 8–13
GENERAL TROUBLESHOOTING OF PERFORMANCE COMPLAINTS
WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
OVERHEATING IN ALL
RANGES
(cont’d)
Inadequate cooler sizing
See vehicle OEM for
specifications
Excessive cooler circuit pressure
drop
Check for plugged cooler, lines
too small, collapsed hose, too
many elbows in circuit
FLUID COMES OUT OF THE
FLUID FILL TUBE AND/OR
BREATHER
Dipstick loose Tighten cap, replace if necessary
Fluid level too high Drain to proper level (refer to
transmission Mechanic’s Tips)
Fluid level too low Add fluid to proper level
Breather stopped up — clogged Clean or replace breather (refer
to transmission Service Manual)
Fluid contaminated with foreign
liquid
Drain and replace fluid. Locate
and fix source of additional fluid
(refer to transmission Service
Manual if repair is needed)
Dipstick or fill tube seal worn Replace seals or dipstick
Incorrect dipstick marking Calibrate dipstick (refer to
transmission Mechanic’s Tips)
NOISE OCCURRING
INTERMITTENTLY
(BUZZING)
Low fluid level Add fluid to proper level (refer to
transmission Mechanic’s Tips for
proper dipstick calibration)
Air leak in oil suction screen
canister
Replace oil suction screen
canister (refer to transmission
Service Manual)
Clogged filters Replace filters (refer to
transmission Mechanic’s Tips)
Aerated fluid causes noisy pump Correct fluid level (refer to
transmission Mechanic’s Tips for
proper dipstick calibration)
Low main pressure causes main
regulator valve to oscillate
See Low Pressure section
LEAKING FLUID
(OUTPUT SHAFT)
Faulty or missing seal at output
flange
Install new lip-type seal in rear of
transmission housing (refer to
transmission Service Manual)
Table 8–1. Troubleshooting Performance Complaints
(cont’d)
Problem
Probable Cause Suggested Remedy
To Next Page
Loading...