Weird Knocking - Gearbox?

Discussion and technical advice the SW20 MR2. 3S-GTE, 3S-GE, 3S-FE etc
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easty-5
Posts: 549
Joined: Mon Sep 14, 2009 10:55 pm
Location: Aberdeen, Scotland

Weird Knocking - Gearbox?

Post by easty-5 »

Car has done it for a while but only thought to post about it now. When the car is idling you get this very faint knocking noise coming from the engine (gearbox side), but the noise stop when you put your foot down on the clutch. I maybe thought the bearing might be on its way out but it was replaced at the start of the year along with the clutch.

Anybody have any ideas what it could be?
easty-5
Posts: 549
Joined: Mon Sep 14, 2009 10:55 pm
Location: Aberdeen, Scotland

Re: Weird Knocking - Gearbox?

Post by easty-5 »

Anybody?
Davey Dave
Posts: 4
Joined: Wed May 07, 2008 5:03 am

Re: Weird Knocking - Gearbox?

Post by Davey Dave »

First off, this is only what happened with mine so it’s probably worst case so don’t worry until properly diagnosed, but mine was doing this for some time, same situ in that the clutch and release bearing were new.

It turned out to be the layshaft in the gear box. Once it had failed (on the motorway) I was told (although I never opened up the box) the shaft had completely collapsed, even out of gear with clutch to the floor it still judderd the car forwards.. but anyway, it started as a knocking. Ended up fitting a recon box.
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