Table 2-1. Troubleshooting (Cont)
Test or lnspection
To make a thorough test of vehicle-mounted transmission, be sure engine is
properly tuned and oil level in transmission is correct.
1. TRANSMISSION OIL TEMPERATURE GAGE STAYS OVER 250°F (121°C).
Step 1. Check for low lubrication oil pressure. Remove plug from lube port and
install 0 to 100 psi (0 to 690 kPa) gage. Start engine and allow to run at
idle speed. With parking brake applied, shift transmission into DRIVE and
accelerate engine to approximately 1900 rpm. Check for 25 to 30 psi
(172 to 207 kPa) lube system pressure.
l If pressure is less than 25 or more than 30 psi (172 to
207 kPa), disassemble transmission (pages 14-22, 14-27, 14-35)
and check for damaged torque converter.
Check for low main pressure. Remove oil line (all except M915A2) or plug
(M915A2) from main pressure port on transmission and install tee (all except
M915A2) and 0 to 300 psi (0 to 2070 kPa) gage. Start engine and allow to
run at idle speed (600 rpm). With parking brake applied, shift transmission
into DRIVE. Check for 80 to 100 psi (552 to 690 kPa) main system pressure.
l If pressure is not 80 to 100 psi (552 to 690 kPa), disassemble
transmission (page 14-27) and inspect lubrication pressure
regulator and converter bypass valve for damage.
Change 1 2-7