1996 Toyota Corolla 4 cyl Front Wheel Drive Automatic 230500 miles
I have replaced the transmission fluid which was really dark and smell burnt recommended by toyota tech but after changing the fluid I can hear knocking sound under driver side that might be issue because of residual particles left and would it be a major issue in long run. It is been just one day after replacement of ATF and car is been drove for 50 miles
Is this " knock" only at idle or gets worse with rpm?
June, 8, 2010 AT 8:33 AM
Thanks for reply. It knocks at idle but it is not laoud. I put some lucas transmission repair fluid in it and noticed it shifts smoother but when I push the brake and engine starts to idle I can hear the knocking sound.
June, 9, 2010 AT 8:07 AM
Is it a very light knock, that only happens at idle, then goes away when you idle up?
June, 9, 2010 AT 8:23 AM
Yes you are correct.
June, 10, 2010 AT 8:19 AM
I have seen some early Corolla's that make this noise, while it sounds like a bearing, it is not.
Possible torque convertor, torque convertor bolts to flexplate, PS pump etc.
I have a 91 that has made this noise for the last 60K.
I changed engines, transmissions, oil pump, waterpump, stem seals, alternator, camshaft shims, CV axles, and noise is still there.
I don't worry about it.
Change oil every 3-5K and trans fluid every 24K. Flush and drain cooling system every 2 years.