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Severe vibration 1800 to 2200 rpm

  • colinjgraham
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24 Jun 2013 20:02 - 24 Jun 2013 20:03 #74959 by colinjgraham
Severe vibration 1800 to 2200 rpm was created by colinjgraham
Hi, this is my first post so forgive me if I am going over old ground. I have just had the gearbox rebuilt and a new clutch fitted to my 56 reg jimny. It has now developed a severe vibration from 1800 to 2200 rpm. I cannot find the problem but suspect that the prop shaft is causing this even though it disapeares if you just touch the throttle. Cruising at 30 to 40mph is impossible due to the vibration. Any help would be great as I am a newbie on jimny, cheers.
Last edit: 24 Jun 2013 20:03 by colinjgraham.

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  • markyp2000
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24 Jun 2013 20:41 #74966 by markyp2000
Replied by markyp2000 on topic Severe vibration 1800 to 2200 rpm
Vibration through what the steering or the chassis

One thing is it in 2wd

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  • colinjgraham
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26 Jun 2013 12:07 #75146 by colinjgraham
Replied by colinjgraham on topic Severe vibration 1800 to 2200 rpm
Hi, thanks for the reply, the vibrations are through the chassis, I have only tried it in 2wd but will get on some slippy stuff and try 4wd as well. It seems worse in 3rd 4th and 5th though,

Cheers

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  • markyp2000
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26 Jun 2013 17:10 #75173 by markyp2000
Replied by markyp2000 on topic Severe vibration 1800 to 2200 rpm
Could be one of the front locking hub stuck on i had that on mine take them off and go for a drive and see if its ok

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  • colinjgraham
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27 Jun 2013 09:12 #75244 by colinjgraham
Replied by colinjgraham on topic Severe vibration 1800 to 2200 rpm
Thanks for that, probably wont get a chance till the weekend now, I will post how it goes.

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27 Jun 2013 14:07 #75254 by mlines
I would have suspected a universal joint

Sent from my HP Slate 7 using Tapatalk HD

Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses

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  • topjimny
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29 Jun 2013 15:03 #75490 by topjimny
Replied by topjimny on topic Re:Severe vibration 1800 to 2200 rpm
My Jimny does that too. Only in 3rd, 4th and 5th gear, between 1500 and 2000 rpm (1700 is the worst). I can hear the rear windows rattling...

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29 Jun 2013 20:32 - 29 Jun 2013 20:33 #75516 by facade
They all do that Sir ;)

New trailing arm bushes at the back and a rear UJ made mine reduce from self destruct mode to just very annoying.

The diesel has one of those harmonic damper thingies on the nose of the rear differential, most likely to reduce this, I suspect it is a resonance problem with the propshaft/axle, made worse by worn bushes or universal joints.

You could try bolting a lump of lead (depleted uranium would be better) to the bolt holes under the rear diff nose, this ought to move the vibration to a lower speed.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)
Last edit: 29 Jun 2013 20:33 by facade.
The following user(s) said Thank You: topjimny

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  • topjimny
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01 Jul 2013 16:52 #75678 by topjimny
Replied by topjimny on topic Severe vibration 1800 to 2200 rpm
Thanks for the info facade.

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  • colinjgraham
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03 Jul 2013 12:41 #75890 by colinjgraham
Replied by colinjgraham on topic Severe vibration 1800 to 2200 rpm
Sorry for not replying to posts, I have been away. When you say they all do that mine did not have any vibration at all until I had the gearbox rebuilt and a new clutch fitted, now it is virtually un-driveable at 30-40 ,mph in 3rd, 4th or 5th.
I know the exhaust is a flexi type with springs on the bolts and fire rings so the joints can flex, I messed about with it and the vibration reduced for a while but came back after I had driven a few miles. It may be resonating when it is flexed by the engine moving under load, not sure though :S Will investigate further an keep you posted, cheers

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  • colinjgraham
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16 Jul 2013 07:42 #77174 by colinjgraham
Replied by colinjgraham on topic Severe vibration 1800 to 2200 rpm
Hi, been away for a while, no further joy with reducing the vibrations, anyone know where I could get one of the weights that was mentioned by façade, from a diesel to bolt onto the dif? Cheers

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16 Jul 2013 17:07 #77227 by Busta
Just drive it at 4,000rpm like your supposed to. Problem solved! ;)

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