Gearbox issue or not ?
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Gearbox issue or not ?
Hi all!
French owner here (Sorry for my writing !), since I bought it 2 years ago, I hear a cracking noise within 2000-2500rpm range.
It is a 2006 blue 231hp with a 6 shift level gearbox.
For history, the gearbox has been opened twice by previous owner's garage.
After expertise, my garage opened it and changed 5 bearings and the clutch release bearing.
The cracking noise is still here, and the 6th does a bit more noise.
Another owner lends me a gearbox.
The cracking noise is still here, an overall noise is also present with this gearbox.
We drove it this morning with the expert, and we are waiting for the original gearbox to be installed, for comparison.
Today it is a bit confusing, and the expert doesn't know if it is normal or not.
The garage says it lacks of insulation (noise reduction), but S1's does not seems to have much insulation...
I'm coming to you to know if someone already seen such issue, or have any idea to solve it!
Best regards,
Alex.
French owner here (Sorry for my writing !), since I bought it 2 years ago, I hear a cracking noise within 2000-2500rpm range.
It is a 2006 blue 231hp with a 6 shift level gearbox.
For history, the gearbox has been opened twice by previous owner's garage.
After expertise, my garage opened it and changed 5 bearings and the clutch release bearing.
The cracking noise is still here, and the 6th does a bit more noise.
Another owner lends me a gearbox.
The cracking noise is still here, an overall noise is also present with this gearbox.
We drove it this morning with the expert, and we are waiting for the original gearbox to be installed, for comparison.
Today it is a bit confusing, and the expert doesn't know if it is normal or not.
The garage says it lacks of insulation (noise reduction), but S1's does not seems to have much insulation...
I'm coming to you to know if someone already seen such issue, or have any idea to solve it!
Best regards,
Alex.
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Re: Gearbox issue or not ?
I'm not aware of any issue with cracking noise from the gearbox.
The gearbox can be quite noisy, more a rustling noise, in neutral with the clutch up, which goes away when the clutch is down.
This can be worse if the gearbox oil is overdue for a change or the wrong oil has been used - must be GL-4 not GL-4/5 or GL-5 for the 6-speed. It can also be more noticeable if the rubber boot under the gear change lever has split.
Other than that, these gearboxes aren't known for noises, at all.
The clutch release bearing can be noisy, particularly if a cheap one has been used, but you say that's been changed.
I suspect that the noise isn't coming from the gearbox at all.
Can you capture a video and put it on youtube, or somewhere else that we can view and hear.
The gearbox can be quite noisy, more a rustling noise, in neutral with the clutch up, which goes away when the clutch is down.
This can be worse if the gearbox oil is overdue for a change or the wrong oil has been used - must be GL-4 not GL-4/5 or GL-5 for the 6-speed. It can also be more noticeable if the rubber boot under the gear change lever has split.
Other than that, these gearboxes aren't known for noises, at all.
The clutch release bearing can be noisy, particularly if a cheap one has been used, but you say that's been changed.
I suspect that the noise isn't coming from the gearbox at all.
Can you capture a video and put it on youtube, or somewhere else that we can view and hear.
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Re: Gearbox issue or not ?
Hi warpcOil,
Thanks for this comment, I'll speak about this with expert and my garage.
At the moment, my car stayed in the garage, I can ask him to make a quick video.
Another thing, I observed gear shifter move quite much when car is idle, neutral gear. That look surprising for a rotary engin ... That's may not say anything ...
Thanks for this comment, I'll speak about this with expert and my garage.
At the moment, my car stayed in the garage, I can ask him to make a quick video.
Another thing, I observed gear shifter move quite much when car is idle, neutral gear. That look surprising for a rotary engin ... That's may not say anything ...
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Re: Gearbox issue or not ?
It's worth checking the engine mounts if the gearstick moves around a lot.
viewtopic.php?f=25&t=27054
Thinking about it, a totally failed engine mount could make a cracking noise, as you apply/release power
viewtopic.php?f=25&t=27054
Thinking about it, a totally failed engine mount could make a cracking noise, as you apply/release power
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Re: Gearbox issue or not ?
I've seen something here too: https://www.youtube.com/watch?v=qnQJ6njzI4A
Noise is when I apply power in 2nd (I have to press more gas), 3rd, 4th, 5th(little harder to reproduce), 6th(becomes harder to reproduce)
Noise is when I apply power in 2nd (I have to press more gas), 3rd, 4th, 5th(little harder to reproduce), 6th(becomes harder to reproduce)
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Gearbox issue or not ?
Hi Alex & to the RX-8OC
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Re: Gearbox issue or not ?
Hi all,
Test with expert is done and sound is still present with original gearbox.
The grinding sound can be hear at this link, around 25":
https://www.youtube.com/watch?v=vJVjbeaoUrc
Engine mounts have been checked by the garage and looks ok.
We have no clues, I will try another garage to get another point of view.
Any ideas are welcome !
Alex.
Test with expert is done and sound is still present with original gearbox.
The grinding sound can be hear at this link, around 25":
https://www.youtube.com/watch?v=vJVjbeaoUrc
Engine mounts have been checked by the garage and looks ok.
We have no clues, I will try another garage to get another point of view.
Any ideas are welcome !
Alex.
Last edited by arcueid on Thu Apr 08, 2021 4:51 pm, edited 1 time in total.
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Re: Gearbox issue or not ?
You are too quick for my connection ^^
Video is online (at least for SD part), you can hear the noise at 25".
Video is online (at least for SD part), you can hear the noise at 25".
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Re: Gearbox issue or not ?
that sounds more like the differential to me as its very much load related
has the oil been drained and its condition checked for metal flakes ?
what state are the diff mounts in? is the PPF ( big metal beam that joins the gearbox to axle) aligned correctly?https://www.rx8performance.com/pages/tech-tips
has the oil been drained and its condition checked for metal flakes ?
what state are the diff mounts in? is the PPF ( big metal beam that joins the gearbox to axle) aligned correctly?https://www.rx8performance.com/pages/tech-tips
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Re: Gearbox issue or not ?
garage had feeling noise comes from rear of the car, maybe differential, but I don't think he checked further on this side.
About alignment, he told me everything was ok, but with an eye of someone that doesn't know much the car.
Next week, I will but my rx8 to another garage, to get a new and fresh vision.
I will give your recommendations. Thanks !
During this time I may take pictures of different points if you want. Can you tell me precisely were the mounts are ?
About alignment, he told me everything was ok, but with an eye of someone that doesn't know much the car.
Next week, I will but my rx8 to another garage, to get a new and fresh vision.
I will give your recommendations. Thanks !
During this time I may take pictures of different points if you want. Can you tell me precisely were the mounts are ?
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Re: Gearbox issue or not ?
Unless the garage knew what they were looking for they may miss knackered mounts.arcueid wrote: ↑Thu Apr 08, 2021 4:39 pmHi all,
Test with expert is done and sound is still present with original gearbox.
The grinding sound can be hear at this link, around 25":
Engine mounts have been checked by the garage and looks ok.
We have no clues, I will try another garage to get another point of view.
Any ideas are welcome !
Alex.
Sunlight Silver 231
Pete/Peter him/he/hrh couldn't really care as have 3 siblings and was lucky not to get called by the dogs name.
Living with a rotary - 7 Years in
viewtopic.php?p=1105043#p1105043
Pete/Peter him/he/hrh couldn't really care as have 3 siblings and was lucky not to get called by the dogs name.
Living with a rotary - 7 Years in
viewtopic.php?p=1105043#p1105043
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Re: Gearbox issue or not ?
Ok the mount you suggested me last time, I thought it was others on differential (sorry for my pour french).
I suggested garage to look for engin mounts, he checked and tell me they are good. I may check by myself or with the other garage ^^
Thanks so far guys
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Re: Gearbox issue or not ?
have a read of the topic warpcoil has suggested as it shows how to quickly check the engine mounts
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Re: Gearbox issue or not ?
Driver side = okay
Passenger side = failed
It's common for the right side to fail first due to the heat from the exhaust manifold.
Passenger side = failed
It's common for the right side to fail first due to the heat from the exhaust manifold.
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Re: Gearbox issue or not ?
you can make a repair by drilling out the underside on the failed mount and filling with silicone
its not as good as a new OEM mount but its considerably cheaper and works better than a failed OEM mount
its not as good as a new OEM mount but its considerably cheaper and works better than a failed OEM mount
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Re: Gearbox issue or not ?
quick and dirty, but might be sufficient to confirm if issues comes from mounts or not Thanks !
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Re: Gearbox issue or not ?
By "silicone", did you mean "polyurethane" ?
I can't see silicone being sturdy enough, but I haven't tried it.
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Re: Gearbox issue or not ?
sorry yes
thanks for clarifying
from memory this is what I used
https://www.mbfg.co.uk/pt-flex-70-rubber.html
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Re: Gearbox issue or not ?
Hi all,
The other garage observed engine mounts and said both are quite used: driver's one is too low and passenger's one is too high.
I'm going to change them.
Which parts would you recommend me ?
He also also observed differential mounts are a bit crackled.
Alex.
The other garage observed engine mounts and said both are quite used: driver's one is too low and passenger's one is too high.
I'm going to change them.
Which parts would you recommend me ?
He also also observed differential mounts are a bit crackled.
Alex.