95 Lumina Down Shift Problem
Doug6274
01-27-2007, 07:23 PM
Any ideas?? 95 Lumina 3.1 When accelerating gently in 4th gear up a hill sometimes gas pedal vibrates and it won't downshift. If you back-off the pedal and accelerate a little harder it will downshift. Any ideas what the problem is??
Blue Bowtie
01-29-2007, 09:54 AM
It could be the torque converter clutch not releasing cleanly, caused by a sticky solenoid valve or spool. Do all the ranges seem to operate normally when up-shifting?
When driving on level ground at speed, maintain speed (cruise control off) while lightly touching the brake pedal to see it the TCC releases. You should be able to force the TCC to release. Remove your foot from the brake and the TCC should engage within two seconds. You should be able to do this several times to see how the TCC applies and releases.
Given the age, and with the possibility of considerable mileage, if the transmission oil and filter have not been changed recently, it may be due.
When driving on level ground at speed, maintain speed (cruise control off) while lightly touching the brake pedal to see it the TCC releases. You should be able to force the TCC to release. Remove your foot from the brake and the TCC should engage within two seconds. You should be able to do this several times to see how the TCC applies and releases.
Given the age, and with the possibility of considerable mileage, if the transmission oil and filter have not been changed recently, it may be due.
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