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clunking from back of gearbox area

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oldbargee
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clunking from back of gearbox area

Postby oldbargee » Wed Jan 09, 2019 12:29 pm

Hi Guys,
I have been chasing a clunk for ages with no joy and it's driving me mad. The car is a 1.8 Mk2.5 sport 2002. 45,000 miles The sound seems to be coming from beneath just in front of the passenger seat though it could be transmitted noise. It's worst at fairly low speeds on uneven roads and particularly bad reversing up an incline. As far as I can I have checked wishbone bushes top and bottom, the sway bar drop links have been replaced. The exhaust feels secure and I cannot create a clunk by shoving it. Similarly I can't re create it by jumping up on down on the sill inside passenger door or by pushing the car down at that corner. Before I try to remove the large metal plate that covers the centre of the exhaust I was wondering if there were any other exhaust support bushes beneath there that could be at fault? I don't think it's the propshaft as engaging gear doesn't create the noise either. If anyone could give me a starter on this it would be a great start to 2019!!
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Re: clunking from back of gearbox area

Postby Mazda Mender » Wed Jan 09, 2019 7:06 pm

Clunk or rattle ?
M-m
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This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt
Mk 1 Eunos 95 blue G-ltd 1.8...being refurbed
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blackyb
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Re: clunking from back of gearbox area

Postby blackyb » Wed Jan 09, 2019 10:52 pm

I seem to recall once reading about a clutch fault that caused a judder at slow speeds and in particular reverse.

It was said to be a problem on the 2.5s and I believe there was an updated clutch solution.

That said I am not a super dooper master Mazda mender, he will be along later one way or another.

:whistle:
1993 1.6 Eunos Roadster (gone)
1998 UK Mk 2 1.6 (gone)
2003 1.8 SVT Sport (Why did I sell it!!!!)
1991 1.6 Eunos Roadster with a bit of bling.

Life is a journey, best travelled topless in an MX5!!
oldbargee
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Re: clunking from back of gearbox area

Postby oldbargee » Thu Jan 10, 2019 9:49 pm

definitely more of a clunk than a rattle. It does have a bit of a clutch problem leading to a juddering start when cold. Could a lump of clutch be bouncing around ? Bizarre thought but having exhausted the other possibilities........... Guess I'll just have to get the large steel plate off and hope something turns up.
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Re: clunking from back of gearbox area

Postby Mazda Mender » Thu Jan 10, 2019 10:55 pm

Are you sure it is not the diff?
Cluch judder is a common issue on the 2/2.5's straight from the dealership.
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt
Mk 1 Eunos 95 blue G-ltd 1.8...being refurbed
http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
oldbargee
Posts: 4
Joined: Tue Jan 24, 2017 4:10 pm

Re: clunking from back of gearbox area

Postby oldbargee » Fri Jan 11, 2019 12:27 pm

definitely coming from in front of seating, will get wriggling under and take out the underfloor panels and see if anything reveals itself.
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Re: clunking from back of gearbox area

Postby Mazda Mender » Fri Jan 11, 2019 1:25 pm

Have you had alignment done recently...
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt
Mk 1 Eunos 95 blue G-ltd 1.8...being refurbed
http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
oldbargee
Posts: 4
Joined: Tue Jan 24, 2017 4:10 pm

Re: clunking from back of gearbox area

Postby oldbargee » Fri Jan 18, 2019 7:44 pm

I feel a right t*t reporting this but I just had an MOT done. Once the car was on the ramps with the front end lifted up, we spotted that a locknut on the front right antiroll bar drop link had come loose allowing movement. Absolutely amazing to me how transmitted sound fooled me. Anyway, the kind tester grabbed a couple of spanners and tightened it up. Job done and my love for this little 16 year old car is back. Not one thing to do for the MOT. Boy, these wee beasts are tough. Thanks anyway for the ideas, hopefully my experience might help someone else.
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Re: clunking from back of gearbox area

Postby Mazda Mender » Fri Jan 18, 2019 9:18 pm

Great news, glad it's all sorted and nothing major ....
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt
Mk 1 Eunos 95 blue G-ltd 1.8...being refurbed
http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/

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