Transmission Grinds into 4th gear...
#1
Transmission Grinds into 4th gear...
My 8 began to grind WHENEVER I shift into 4th gear above 4k RPM, even when I was granny shifting. It grinds from time to time when shifted between 2.5K - 4K rpm (without granny shifting that is).
After a quick search, I figured that synchro may have gone bad so I took it into dealer for a look, the dealer was able to verify the problem but was saying that they do not have the tools required to fix the problem (it is a large dealer btw). Here is what I get:
"CUSTOMER STATES GEAR GRIND WHEN SHIFTING INTO 4TH GEAR, ALWAYS HAPPEN AT 4000RPM. VERIFIED COMPLAINT. NOISE IS INTERNAL IN TRANSMISSION. SPECIAL TOOL NEEDED FOR NOISE WHICH DEALER DOES NOT HAVE. RECOMMEND CUSTOMER GOES TO ANOTHER DEALER FOR THIS REPAIR"
Now question is: could this even be possible?
I called another dealer and describe what happened, the service guy answering the phone basically was implying that it is quite impossible that the first dealer does not have the tool to do the job and was just BS me to do the warranty repair somewhere else...What do you think?
Also, the second dealer is saying that if there is indeed something wrong with the transmission, it would take a day or two to get the repair done and the rental car cost would not be covered by warranty...I am still under B2B warranty. Is that true?
After a quick search, I figured that synchro may have gone bad so I took it into dealer for a look, the dealer was able to verify the problem but was saying that they do not have the tools required to fix the problem (it is a large dealer btw). Here is what I get:
"CUSTOMER STATES GEAR GRIND WHEN SHIFTING INTO 4TH GEAR, ALWAYS HAPPEN AT 4000RPM. VERIFIED COMPLAINT. NOISE IS INTERNAL IN TRANSMISSION. SPECIAL TOOL NEEDED FOR NOISE WHICH DEALER DOES NOT HAVE. RECOMMEND CUSTOMER GOES TO ANOTHER DEALER FOR THIS REPAIR"
Now question is: could this even be possible?
![Shocking](https://www.rx8club.com/images/smilies/shocking.gif)
Also, the second dealer is saying that if there is indeed something wrong with the transmission, it would take a day or two to get the repair done and the rental car cost would not be covered by warranty...I am still under B2B warranty. Is that true?
#3
![Icon No2](https://www.rx8club.com/images/smilies/icon_no2.gif)
i will certainly get it done...one way or another. now can anyone answer the question about car rental during warranty repair? i usually just wait and never deal with that...
#5
Relax baby!
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. i had it happen to me on the 4th to 5th shift above 8000rpm.[/QUOTE]
Mine does this too, it start doing it on 1 to 2 also above 8000 rpm but change fluids and 1 to 2 stop grinding.. do i need a new tranny
Mine does this too, it start doing it on 1 to 2 also above 8000 rpm but change fluids and 1 to 2 stop grinding.. do i need a new tranny
Last edited by rx 8speciale; 11-02-2009 at 11:16 AM.
#7
2009 RX-8 Touring
To be fair, synchronizing from 8000rpm down to 5000rpm in a split-second is a much harder job than what most synchros have to put up with. Remember, when speed doubles, inertia quadruples. Not that that's an excuse for the transmission to grind into gear, but it is a reason why it would be doing that.
What is the OEM transmission fluid, anyway? Is it gear oil or ATF? If it's gear oil, has anyone tried ATF? ATF gets sticky when squeezed into a thin film, so it might make the synchros work faster.
What is the OEM transmission fluid, anyway? Is it gear oil or ATF? If it's gear oil, has anyone tried ATF? ATF gets sticky when squeezed into a thin film, so it might make the synchros work faster.
#8
To be fair, synchronizing from 8000rpm down to 5000rpm in a split-second is a much harder job than what most synchros have to put up with. Remember, when speed doubles, inertia quadruples. Not that that's an excuse for the transmission to grind into gear, but it is a reason why it would be doing that.
What is the OEM transmission fluid, anyway? Is it gear oil or ATF? If it's gear oil, has anyone tried ATF? ATF gets sticky when squeezed into a thin film, so it might make the synchros work faster.
What is the OEM transmission fluid, anyway? Is it gear oil or ATF? If it's gear oil, has anyone tried ATF? ATF gets sticky when squeezed into a thin film, so it might make the synchros work faster.
![Mad](https://www.rx8club.com/images/smilies/mad.gif)
#11
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Hmm, did u call em out on what "special tool" they didnt have??? They have everything needed to tear apart/repair a tranny, pssht please... If u end up getting it done, i guarentee it will take longer than a couple days. I had mine done at a reputable dealership and i didnt get the car back for better part of 2 weeks. Car will set in the lot for couple days waiting its turn...then they will get it in and tear tranny down, find the defective parts....order new parts from Mazda...takes couple days to get there...parts arrive and the tranny is put back together...u get ur car back with a couple new scratches, dings and greasy smudges from the dirty techs paws being all over ur ride, oh and hopefully a smoothe tranny
In the meantime i drove around a POS base 3 provided by the dealership. Good luck with the forthcoming headaches..
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
Last edited by jones75254; 11-02-2009 at 08:02 PM.
#13
![Thumbs up](https://www.rx8club.com/images/icons/icon14.gif)
I had this same problem then I changed my fluids to a synthetic 75W90 gear oil and still had it. Then I put some extra fluid to top it off some more through the gear box by taking out my stick shifter out and pouring it through the hole and voila! No more grinding in fourth gear!
#14
My 8 began to grind WHENEVER I shift into 4th gear above 4k RPM, even when I was granny shifting. It grinds from time to time when shifted between 2.5K - 4K rpm (without granny shifting that is).
After a quick search, I figured that synchro may have gone bad so I took it into dealer for a look, the dealer was able to verify the problem but was saying that they do not have the tools required to fix the problem (it is a large dealer btw). Here is what I get:
"CUSTOMER STATES GEAR GRIND WHEN SHIFTING INTO 4TH GEAR, ALWAYS HAPPEN AT 4000RPM. VERIFIED COMPLAINT. NOISE IS INTERNAL IN TRANSMISSION. SPECIAL TOOL NEEDED FOR NOISE WHICH DEALER DOES NOT HAVE. RECOMMEND CUSTOMER GOES TO ANOTHER DEALER FOR THIS REPAIR"
Now question is: could this even be possible?
I called another dealer and describe what happened, the service guy answering the phone basically was implying that it is quite impossible that the first dealer does not have the tool to do the job and was just BS me to do the warranty repair somewhere else...What do you think?
Also, the second dealer is saying that if there is indeed something wrong with the transmission, it would take a day or two to get the repair done and the rental car cost would not be covered by warranty...I am still under B2B warranty. Is that true?
After a quick search, I figured that synchro may have gone bad so I took it into dealer for a look, the dealer was able to verify the problem but was saying that they do not have the tools required to fix the problem (it is a large dealer btw). Here is what I get:
"CUSTOMER STATES GEAR GRIND WHEN SHIFTING INTO 4TH GEAR, ALWAYS HAPPEN AT 4000RPM. VERIFIED COMPLAINT. NOISE IS INTERNAL IN TRANSMISSION. SPECIAL TOOL NEEDED FOR NOISE WHICH DEALER DOES NOT HAVE. RECOMMEND CUSTOMER GOES TO ANOTHER DEALER FOR THIS REPAIR"
Now question is: could this even be possible?
![Shocking](https://www.rx8club.com/images/smilies/shocking.gif)
Also, the second dealer is saying that if there is indeed something wrong with the transmission, it would take a day or two to get the repair done and the rental car cost would not be covered by warranty...I am still under B2B warranty. Is that true?
#19
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I had a grind going into 4th as well and brought it in to mazda and they told me to either install a new tranny or they could rebuild the synchros. Both very very expensive but they happened to have a used tranny the rebuilt that was cheaper and now it runs perfect!! Still was quite expensive but now it runs so much better.
#21
Vtak just kicked in yo!!
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Trans #1-
Grind from
1-2
3-4
5-6
Result
Trans Rebuild at 28K miles.
Trans was rebuilt improperly causing trans to blow at 32K-ish resulting in new trans.
Trans #2
Grind into 4th
Loud whining noise began
Trans blew at 78K miles
Trans #3
Lets see what happens....
These transmissions aren't the most robust around and Mazda knows it, so they'll work with it if youre under powertrain warranty
Grind from
1-2
3-4
5-6
Result
Trans Rebuild at 28K miles.
Trans was rebuilt improperly causing trans to blow at 32K-ish resulting in new trans.
Trans #2
Grind into 4th
Loud whining noise began
Trans blew at 78K miles
Trans #3
Lets see what happens....
These transmissions aren't the most robust around and Mazda knows it, so they'll work with it if youre under powertrain warranty
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