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Vibratechnics gearbox mount. Loud!

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Old 21-05-2018, 02:44 PM
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plynchy
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Default Vibratechnics gearbox mount. Loud!

I'm slowly getting closer to MOT time, car is now on it's wheels and driven down the road a few hundred yards today.

I fitted a gear box mount as above during the refresh, it's pushed the gearbox up so it's making contact with the tranny tunnel and as a result is bloody noisy. I think it's the combination of that and the new engine mounts.

Was thinking of making up some 3-4 mm spacers to create a gap.

Anyone had similar issues and come up with a decent solution?
Old 22-05-2018, 11:28 AM
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tosh
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It’s a while since I fitted my updated engine an gearbox mounts but didn’t have any trouble and definitely didn’t change the position of the box, this would of also changed the position of your driveshaft wouldn’t it? Which is also spaced at the bearing cradle.
Old 22-05-2018, 12:07 PM
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plynchy
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I've got it back in bits now.

It's looks like the box isn't being drawn down far enough into the new mount, it's a taper fit so not much I can do about that.

I'm guessing that the new Collins engine mounts have also pulled the engine more upright than it was on the previous 29 year old factory mounts. Wasn't expecting to have any issues...
Old 22-05-2018, 01:23 PM
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R4N SS
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im running uprated engine and gearbox mounts in my 3dr but its a 24v BOA and hybrid MT75 - not had any issues at all mate
Old 22-05-2018, 01:42 PM
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tosh
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Now you mention it I also changed the aluminium tapered block that bolts to the gear box for the stronger billet version but I can’t see that making much difference as the angles should all be the same.
Old 22-05-2018, 01:56 PM
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Found an old thread by Brammer, had the same issue.

Leading edge of new mount fouls on the gearbox mount bolts, have trimmed these off, slightly better but not perfect yet. Nice design oversight by Vibra Technics there.

At the transmission tunnel the shifter cover plate bolts are still fouling so need to sort this to stop the vibration transmitting.

Last edited by plynchy; 22-05-2018 at 02:19 PM.
Old 22-05-2018, 07:12 PM
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dan le moignan
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Read a few times to only use uprated engine mounts and leave gearbox mount standard otherwise you tend to get vibration
Old 22-05-2018, 07:51 PM
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plynchy
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Gearbox now clears the tranny tunnel (as it should), vibrations now back to acceptable levels.

The new mount had pushed the gearbox hard up against the tunnel, piss poor design IMO, certainly wouldn't buy another.
Old 22-05-2018, 08:20 PM
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tosh
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It’s been a while since I done mine but I know I had no issues which is strange! Didn’t have to trim anything either, I presuming it’s 2wd with the aluminium cradle? I can even remember measuring the prop tho make sure it ended up in the same position.
Old 22-05-2018, 09:29 PM
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Originally Posted by plynchy
Gearbox now clears the tranny tunnel (as it should), vibrations now back to acceptable levels.

The new mount had pushed the gearbox hard up against the tunnel, piss poor design IMO, certainly wouldn't buy another.
I have found that many so called "straight forward swap" new modified parts have to be fettled to make them fit. I wonder sometimes if the people that make and sell them have actually fitted them to make sure there are no problems.
Old 25-05-2018, 08:49 AM
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Caddyshack
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Originally Posted by cossynut2
I have found that many so called "straight forward swap" new modified parts have to be fettled to make them fit. I wonder sometimes if the people that make and sell them have actually fitted them to make sure there are no problems.
Yes, it is often the case.

The comp brake bias pedal box for the 205 that was "designed" for the 205 was a physical impossibility to fit without major modifications.
Old 31-05-2018, 08:11 PM
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I fitted vibes tech mounts to my saff and I got told just to leave the gearbox mount.
Old 31-05-2018, 08:45 PM
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Originally Posted by cossynut2
I have found that many so called "straight forward swap" new modified parts have to be fettled to make them fit. I wonder sometimes if the people that make and sell them have actually fitted them to make sure there are no problems.
That is so true.
Old 30-08-2019, 06:24 AM
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luke_rs1800
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Originally Posted by plynchy
Gearbox now clears the tranny tunnel (as it should), vibrations now back to acceptable levels.

The new mount had pushed the gearbox hard up against the tunnel, piss poor design IMO, certainly wouldn't buy another.
I have just fitted one of these to mine and have the exact same issue! How did you sort it in the end ? Space the cradle down ?
Old 30-08-2019, 05:31 PM
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Originally Posted by luke_rs1800
I have just fitted one of these to mine and have the exact same issue! How did you sort it in the end ? Space the cradle down ?
Looks like you need to trim the bolts etc as per this: Leading edge of new mount fouls on the gearbox mount bolts, have trimmed these off, slightly better but not perfect yet. Nice design oversight by Vibra Technics there.

At the transmission tunnel the shifter cover plate bolts are still fouling so need to sort this to stop the vibration transmitting.



therefore see where it rubs and get the grinder out.
Old 30-08-2019, 06:16 PM
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luke_rs1800
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Hopefully the OP replies as he said his now no longer touches the tunnel. Be good to see what he did to overcome it
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