Help with diagnosing a whinging gearbox
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Re: Help with diagnosing a whinging gearbox
Looks like the PPF is sitting really low.
The engine mounts look like they're on an angle as well.
When you tightened up the PPF did you jack it up slightly before hand
The engine mounts look like they're on an angle as well.
When you tightened up the PPF did you jack it up slightly before hand
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Re: Help with diagnosing a whinging gearbox
The gearbox was bolted up to the engine, then lifted the ppf up using scissor jack, torqued up the diff bolts first and then the bolts at the gearbox end.
Will take the ppf off and re install. Will put a jack under the gearbox to lift slightly ahead of tightening the bolts up.
How much of a gap do you think I should be aiming for?
Thanks
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Will take the ppf off and re install. Will put a jack under the gearbox to lift slightly ahead of tightening the bolts up.
How much of a gap do you think I should be aiming for?
Thanks
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Re: Help with diagnosing a whinging gearbox
If you go to https://www.rotaryheads.com/PDF/RX8/
Download the transmission pdf and go to page 31
Download the transmission pdf and go to page 31
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Re: Help with diagnosing a whinging gearbox
Thanks guys. Just to check once I have the ppf set in position the bolt through the cross member needs to be removed, right?
48.4-56.4mm from the underside of the front member to the bottom of the ppf
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48.4-56.4mm from the underside of the front member to the bottom of the ppf
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Re: Help with diagnosing a whinging gearbox
Yes, remove the bolt after setting the correct gap.
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Re: Help with diagnosing a whinging gearbox
I did find one still in place under a members car, after he'd had the clutch replaced the year before.
Apparently it often "sounded like someone was trapped in the boot"
Apparently it often "sounded like someone was trapped in the boot"
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Re: Help with diagnosing a whinging gearbox
I've re-set the PPF with 55mm gap and taken it for a test drive and i'm still getting the same whining noise from the car. All that wasted effort in switching out the gearbox. So annoying.
The one positive is that the S1 box gear shifts feel smoother and faster than my R3 box.
I'm now thinking that this could be a differential issue.
Keen to hear thoughts on whether or not i should try and source an R3 diff to replace my one or pair my new S1 box up to an S1 diff? Do you think there would be any noticeable acceleration difference between S1 box + R3 diff combo compared with S1 box + S1 diff? Understand that MPG will be up.
Thanks
The one positive is that the S1 box gear shifts feel smoother and faster than my R3 box.
I'm now thinking that this could be a differential issue.
Keen to hear thoughts on whether or not i should try and source an R3 diff to replace my one or pair my new S1 box up to an S1 diff? Do you think there would be any noticeable acceleration difference between S1 box + R3 diff combo compared with S1 box + S1 diff? Understand that MPG will be up.
Thanks
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Re: Help with diagnosing a whinging gearbox
Having now listened to this on the PC rather than the phone the noise is more of a woo than a whine so i reckon its certainly the gearbox. Given what you have replaced so far then as you and others have also said....diff!
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Re: Help with diagnosing a whinging gearbox
Does anyone have an R3 or S1 diffs available?
Is there any difference between S1 5 speed, 6 speed and auto variants that I should look out for?
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Is there any difference between S1 5 speed, 6 speed and auto variants that I should look out for?
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Re: Help with diagnosing a whinging gearbox
I have an 60k mile S1 diff you can have for the cost of shipping it but they are B heavy.
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- tsouthern (Tue Jul 13, 2021 10:56 am)
Rotary History;
Sep 2005-Aug 2006 EO55 XOL VR 231 New
Oct 2014-Mar 2019 OE06 EWJ VR 231
Jan 2019-Jun 2020 T200 CAD Orange SC 231
Feb 2020-May 2023 RR54 AJR VR 231 Modified for Track
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Sep 2005-Aug 2006 EO55 XOL VR 231 New
Oct 2014-Mar 2019 OE06 EWJ VR 231
Jan 2019-Jun 2020 T200 CAD Orange SC 231
Feb 2020-May 2023 RR54 AJR VR 231 Modified for Track
Oct 2020-Mar 2021 YA56 EUE Copper Red Nemesis
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Re: Help with diagnosing a whinging gearbox
Hi Chris,ChrisHolmes wrote:I have an 60k mile S1 diff you can have for the cost of shipping it but they are B heavy.
Many thanks for helping me out with the diff. I’ve switched it over and it’s resolved the issue. Car is back in the road now.
I’m going to open up the old diff to see if I can find the issue.
Thanks
Tim
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- warpc0il (Sun Sep 05, 2021 2:01 pm) • Paul_13 (Sun Sep 05, 2021 2:17 pm) • ChrisHolmes (Sun Sep 05, 2021 5:07 pm)
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Re: Help with diagnosing a whinging gearbox
My Gearbox wined and wasn't comfortable in 1st 2nd 3rd made worse by a Petit Racing Short Shifter.
The problem it appears was 80% me
I was chopping the shift making changes far too quickly, subconsciously trying to achieve a shift quicker than the box and the Shifter was comfortable with.
The problem was solved by moving my seat 20mm forward
This allowed me to dip the Clutch to the full extent and slowed down the the movement, this has both made the changes much more comfortable and over the last week the Gearbox has quietened and there is much less wining probably due the gears sychomeshing properly.
The problem it appears was 80% me
I was chopping the shift making changes far too quickly, subconsciously trying to achieve a shift quicker than the box and the Shifter was comfortable with.
The problem was solved by moving my seat 20mm forward
This allowed me to dip the Clutch to the full extent and slowed down the the movement, this has both made the changes much more comfortable and over the last week the Gearbox has quietened and there is much less wining probably due the gears sychomeshing properly.
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Re: Help with diagnosing a whinging gearbox
tsouthern wrote: ↑Sun Sep 05, 2021 1:34 pmHi Chris,ChrisHolmes wrote:I have an 60k mile S1 diff you can have for the cost of shipping it but they are B heavy.
Many thanks for helping me out with the diff. I’ve switched it over and it’s resolved the issue. Car is back in the road now.
I’m going to open up the old diff to see if I can find the issue.
Thanks
Tim
Another part of T200 CAD lives on by fixing another RX8
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Sep 2005-Aug 2006 EO55 XOL VR 231 New
Oct 2014-Mar 2019 OE06 EWJ VR 231
Jan 2019-Jun 2020 T200 CAD Orange SC 231
Feb 2020-May 2023 RR54 AJR VR 231 Modified for Track
Oct 2020-Mar 2021 YA56 EUE Copper Red Nemesis
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Re: Help with diagnosing a whinging gearbox
With any manual gearbox you'll get a slicker shift action if you take the slightest pause and relax your grip as you go through neutral, especially those changes that require a dogleg action; e.g 2nd<>3rd and 4th<>5th on our 'boxes.
However, even if you don't get into this habit, it shouldn't impact the level of noise once you've selected any given gear.
However, even if you don't get into this habit, it shouldn't impact the level of noise once you've selected any given gear.
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Re: Help with diagnosing a whinging gearbox
Opened up my S2 diff and found these. Seen on another thread that it’s common and that people think it’s a result of incorrect MOT brake test.
Do you think this could have been the cause of my diff noise?
My started during a knockhill track day in wet conditions.
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Do you think this could have been the cause of my diff noise?
My started during a knockhill track day in wet conditions.
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Re: Help with diagnosing a whinging gearbox
From the Buyers Guide:
Be aware!
When presenting an RX-8 for an MOT you should inform the tester that the car is equipped with a LSD as it has now become apparent that some MOT stations are not aware that the car is so equipped (although that information should be available when the cars details are entered into the system) and as such the usual brake test using rollers should not be carried out as damage can occur to the differential.
There is an option to carry out the brake test with a decelerometer which will not damage the differential.
Those fragments initially started off being found by MX5 Mk3 owners then the RX-8 started to follow suit.
*
*
Del.
Be aware!
When presenting an RX-8 for an MOT you should inform the tester that the car is equipped with a LSD as it has now become apparent that some MOT stations are not aware that the car is so equipped (although that information should be available when the cars details are entered into the system) and as such the usual brake test using rollers should not be carried out as damage can occur to the differential.
There is an option to carry out the brake test with a decelerometer which will not damage the differential.
Those fragments initially started off being found by MX5 Mk3 owners then the RX-8 started to follow suit.
*
*
Del.
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Re: Help with diagnosing a whinging gearbox
Does anyone know if this can be repaired? Or can re-use the S2 crown and pinion in a S1 diff?
Thanks
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Thanks
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Re: Help with diagnosing a whinging gearbox
As far as I know the gears are interchangeable, they are also very much sort after so could earn you some money as an alternative to keeping them for a rebuild.
Rotary History;
Sep 2005-Aug 2006 EO55 XOL VR 231 New
Oct 2014-Mar 2019 OE06 EWJ VR 231
Jan 2019-Jun 2020 T200 CAD Orange SC 231
Feb 2020-May 2023 RR54 AJR VR 231 Modified for Track
Oct 2020-Mar 2021 YA56 EUE Copper Red Nemesis
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Jun 2023-Jan2024 OV09 BFF Sparkling Black R3
Avatar courtesy of my grandson Cameron
Sep 2005-Aug 2006 EO55 XOL VR 231 New
Oct 2014-Mar 2019 OE06 EWJ VR 231
Jan 2019-Jun 2020 T200 CAD Orange SC 231
Feb 2020-May 2023 RR54 AJR VR 231 Modified for Track
Oct 2020-Mar 2021 YA56 EUE Copper Red Nemesis
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Re: Help with diagnosing a whinging gearbox
I have see those "petals" removed from an 8's diff but I still don't know which part of the construction they come from and what's the impact of them being broken, other than they can get caught between the gears.
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Re: Help with diagnosing a whinging gearbox
My guess is that they are sections from the tapered friction cones.
Rotary History;
Sep 2005-Aug 2006 EO55 XOL VR 231 New
Oct 2014-Mar 2019 OE06 EWJ VR 231
Jan 2019-Jun 2020 T200 CAD Orange SC 231
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Jun 2023-Jan2024 OV09 BFF Sparkling Black R3
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Sep 2005-Aug 2006 EO55 XOL VR 231 New
Oct 2014-Mar 2019 OE06 EWJ VR 231
Jan 2019-Jun 2020 T200 CAD Orange SC 231
Feb 2020-May 2023 RR54 AJR VR 231 Modified for Track
Oct 2020-Mar 2021 YA56 EUE Copper Red Nemesis
Jun 2022-Apr 2023 TN07 JHD KURO Resurrected
Jun 2023-Jan2024 OV09 BFF Sparkling Black R3
Avatar courtesy of my grandson Cameron
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Re: Help with diagnosing a whinging gearbox
That's what I was thinking, but it would be a good opportunity to know for sure, now it's in pieces.
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Re: Help with diagnosing a whinging gearbox
Hi guys,
Does anyone know what socket size I need for the nut lock on the end of the pinion?
I’ve found the park number (0223-27-030) but just not sure what size socket I need to get
Thanks
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Does anyone know what socket size I need for the nut lock on the end of the pinion?
I’ve found the park number (0223-27-030) but just not sure what size socket I need to get
Thanks
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Re: Help with diagnosing a whinging gearbox
Having swept up my fair share of those bits, and having disassembled the internal differential unit of one with those tabs missing, they 100% are from the tapered friction cones. Sometimes they also crack the ring/cone itself, not just break off the tabs.
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