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4th gear synchro grid when downshifting from 3rd.

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Old 02-13-2009, 03:44 PM
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4th gear synchro grind when downshifting from 3rd.

I've posts about a few other people with '04s that have this issue. I have 41k miles. My warranty is up March 28th, so I have a few weeks left to get this fixed.
The problem is that it is not always reproducible, especially not when I have the shop techs look at it. It only grinds sometimes, and usually only in the high rpms.
Suggestions?

Last edited by pieter3d; 02-13-2009 at 03:58 PM. Reason: typo
Old 02-13-2009, 03:52 PM
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take a tech with you so you can reduplicate the problem, or you can do what i did when my warrenty was about up i beat the **** outa the gear that was grinding until it did it everytime.. not the most settle or proper way to go at it but the dealer is just gona f*ck around till your warranty is up then too bad so sad for you...
Old 02-13-2009, 03:57 PM
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I would love to take a tech along, but the problem is that it doesn't always do it. So far I have not found a pattern or a way to reliably reproduce the problem
Old 02-13-2009, 04:06 PM
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well id start w/ checking your tranny fluid making sure its full, put redline tranny fluid in it, last beat fourth gear till it grinds every time. make it grind!
Old 02-13-2009, 08:44 PM
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We have same issue here.
https://www.rx8club.com/series-i-tech-garage-22/2nd-gear-grinds-when-downshifting-166538/
Old 02-19-2009, 05:06 PM
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Car's at the local mazda dealer/shop now. They're scaring me saying mazda might not cover it, but I know they can't make promises about that kind of thing. My transmission's fate is in MNAO's hands now......
Old 02-20-2009, 02:41 AM
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Originally Posted by pieter3d
Car's at the local mazda dealer/shop now. They're scaring me saying mazda might not cover it, but I know they can't make promises about that kind of thing. My transmission's fate is in MNAO's hands now......
it is under the 5 yr 60k mile powertrain warranty, why would they not cover it?

it is not like this has not happened before.

beers
Old 02-20-2009, 10:14 AM
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Phew, ok MNAO has authorized the repair! New 3rd & 4th synchro and 3rd & 4th gear and shift forks. Load off my mind....
Parts arrive tuesday, so until then:
Attached Thumbnails 4th gear synchro grid when downshifting from 3rd.-n19705642_33491515_9167.jpg  
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