1996 Toyota Corolla Transmission fluid replacement

USERMMA

MEMBER
1996 TOYOTA COROLLA
4 CYL
FWD
AUTOMATIC
230,500 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

5 Replies

MMPRINCE4000

EXPERT

Is this "knock" only at idle or gets worse with rpm?

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Tuesday, June 8th, 2010 AT 8:24 AM

USERMMA

MEMBER

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.

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Tuesday, June 8th, 2010 AT 8:33 AM

MMPRINCE4000

EXPERT

Is it a very light knock, that only happens at idle, then goes away when you idle up?

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Wednesday, June 9th, 2010 AT 8:07 AM

USERMMA

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Yes you are correct.

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Wednesday, June 9th, 2010 AT 8:23 AM

MMPRINCE4000

EXPERT

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.