Dear all, I recently noticed a low pitched winning noise in the transmission a few week ago. I checked the fluid level and condition, all was okay. I did a 500km Journey recently, the next day, I noticed a hard thud while shifting to drive. Now the car jerks intermittently while driving. Pls help. I am in a remote location so can't scan the car. My potable scanner shows that knock sensors on both banks are bad. Gazzuzz and co...pls help me.

Gbaj:
Dear all, I recently noticed a low pitched winning noise in the transmission a few week ago. I checked the fluid level and condition, all was okay. I did a 500km Journey recently, the next day, I noticed a hard thud while shifting to drive. Now the car jerks intermittently while driving. Pls help. I am in a remote location so can't scan the car. My potable scanner shows that knock sensors on both banks are bad. Gazzuzz and co...pls help me.

There seems to be a mechanical issue going on with your transmission( with respect to the whine). Did you recently perform an ATF fliud change?
Knock sensor can definitely cause transmission shifting concerns. So I strongly suggest you fix that first. Most likely rats might have eaten up the wires?
Please note that accessing the knock sensors is not DIY for most people.
We can continue the chat here :https://www.nairaland.com/4467246/motor-guru-here-ask-questions

MotorGuru:


There seems to be a mechanical issue going on with your transmission( with respect to the whine). Did you recently perform an ATF fliud change?
Knock sensor can definitely cause transmission shifting concerns. So I strongly suggest you fix that first. Most likely rats might have eaten up the wires?
Please note that accessing the knock sensors is not DIY for most people.
We can continue the chat here :https://www.nairaland.com/4467246/motor-guru-here-ask-questions

Thanks or your prompt reply. The ATF was changed a year ago. Have had the knock sensor codes for about a year too. Could it be the tranny filter?

Gbaj:

Thanks or your prompt reply. The ATF was changed a year ago. Have had the knock sensor codes for about a year too. Could it be the tranny filter?

Fix the knock sensor issues. A common issue on the 1MZ-FE engine. For sure you would have transmission shift issues

Gbaj:

Thanks or your prompt reply. The ATF was changed a year ago. Have had the knock sensor codes for about a year too. Could it be the tranny filter?

You are welcome sir.
I hope the exact atf was used as a replacement( Toyota Type T-IV)?