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Old 04-12-2017, 09:08 AM   #1
BoostedTRD
 
Drives: 09 Yaris Hatchback
Join Date: Oct 2014
Location: VA
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2nd gear grinding

So my 2nd gear has started grinding whenever I downshift from 3rd to 2nd over 30mph. If I wait until the car gets to 20mph I can downshift from 3rd to 2nd without any grinding. I changed my tranny fluid about 10k ago and I started using Red Line MT90, soon after changing it to Red line is when I started noticing but it has gotten worse. Since I don't want to force it into second gear I have gotten used to downshift only when it reaches 20mph.

Will I have to replace the 2nd gear synchros? or can a better quality transmission oil help it out?

On my turbo honda civic third gear was grinding at some point and I started using GM Synchromesh oil and that stopped the grinding. So I am wondering if I can do the same for the yaris... Any suggestions will be greatly appreciated.
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Old 04-12-2017, 02:36 PM   #2
Bluevitz-rs
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I had an issue with downshifting to 4th. It wasn't until I changed to Royal Purple 75-90 GL4 that it fixed the problem. That was over 2 years ago now.
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Old 04-13-2017, 07:21 AM   #3
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Drives: 09 Yaris Hatchback
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Quote:
Originally Posted by Bluevitz-rs View Post
I had an issue with downshifting to 4th. It wasn't until I changed to Royal Purple 75-90 GL4 that it fixed the problem. That was over 2 years ago now.
Thanks for the suggestion, I will try Royal Purple and see what happens.
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