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vibrations
https://auszookers.com/forum/viewtopic.php?f=5&t=8311		 Page 1 of 1
Author:  zukmeista [ Mon Nov 30, 2009 10:39 am ]
Post subject:  vibrations
If I change gear from 3rd to 4th at anything lower than about 3500rpm, I get really bad vibrations that sound like they are coming from the engine :?: :? :(
Author:  royce [ Mon Nov 30, 2009 12:47 pm ]
Post subject:  Re: vibrations
do you get a rattle sound? probably pinging, put better fuel in and check your timing
Author:  zukmeista [ Mon Nov 30, 2009 2:00 pm ]
Post subject:  Re: vibrations
The engine rattles a little bit but I use the highest octane fuel I can get (usually 95). The motor has also been tuned a couple of months ago so I don't see how the timing could be out after a couple of months? Timing belt was replaced at 96,000 k's and the truck has done about 14,000 k's since then :?
Author:  foonji [ Mon Nov 30, 2009 2:04 pm ]
Post subject:  Re: vibrations
are you going up a steep hill when making the change?
Author:  zukmeista [ Mon Nov 30, 2009 5:03 pm ]
Post subject:  Re: vibrations
Nope... This happens when I am on flat ground doing less than 3500rpm in third and then change to fourth gear. It is annoying because I generally take it pretty easy in my truck and I try to avoid revving it past 3000rpm if I can help it.
Author:  steak_knife [ Tue Dec 01, 2009 1:22 am ]
Post subject:  Re: vibrations
4th gear syncro's by the sound of it, is it hard to get into gear when this "vibration" is happening???
Author:  zukmeista [ Tue Dec 01, 2009 10:43 am ]
Post subject:  Re: vibrations
Nope, it slots into gear perfectly. I wouldn't think the syncros would be worn after only 108,000kms though :?
Author:  PJ.zook [ Tue Dec 01, 2009 12:02 pm ]
Post subject:  Re: vibrations
Can you hear the general area of the vibration? Does it rattle the hell out of anything or just a noise? Can you feel it through the steering jerking the car about?

On a side note, assuming its a 1.3 sierra, do give it a good thrashing every now and then, its good for the carby.
Author:  zukmeista [ Tue Dec 01, 2009 12:47 pm ]
Post subject:  Re: vibrations
The vehicle is an '89 1.3 G13A. The vibrations are quite bad and seem to come from the engine. I do give it a bootfull in 2nd gear to 60km/h occasionally but the previous owner probably wouldn't have revved it past 3000rpm.
Author:  steak_knife [ Tue Dec 01, 2009 11:09 pm ]
Post subject:  Re: vibrations
zukmeista wrote:
Nope, it slots into gear perfectly. I wouldn't think the syncros would be worn after only 108,000kms though :?


I've replaced syncro's at 25k on Jim's
Author:  zukmeista [ Wed Dec 02, 2009 9:29 pm ]
Post subject:  Re: vibrations
Any other ideas then? :wink:
Author:  nath_89 [ Wed Dec 02, 2009 10:35 pm ]
Post subject:  Re: vibrations
ive got the same problem with my 92 1.3 im no mechanic but i rekon its sounds/feels like the g/box dunno?
Author:  PJ.zook [ Wed Dec 02, 2009 11:41 pm ]
Post subject:  Re: vibrations
Try and start isolating the vibration. Put smaller road tyres on it, see if that does anything.
Then start with driving along a safe road, get it to vibrate, then see if vibration is still there with clutch in, or when gbox in neutral, transfer in neutral, etc...
Author:  Scrawny [ Thu Dec 03, 2009 2:45 pm ]
Post subject:  Re: vibrations
Check engine and gearbox mounts. Check for play in diff pinions, transfer and all uj's. Check for play in steering, suspension bushes and wheel bearings.

I'm picking it's a uj or transfer/pinion bearing.
Author:  jimbo_jones [ Thu Dec 03, 2009 5:59 pm ]
Post subject:  Re: vibrations
Could be a uni like the lwb on eBay Jack shaft let go and made a good hole in the tunnel
Author:  zukmeista [ Thu Dec 03, 2009 8:04 pm ]
Post subject:  Re: vibrations
But it only does it in 4th gear???
Author:  jimbo_jones [ Thu Dec 03, 2009 10:41 pm ]
Post subject:  Re: vibrations
zukmeista wrote:
But it only does it in 4th gear???


do it only do it in 4th at a cetain speed or will ts do it in 3rd at higher revs or in 5th at lower revs ?
Author:  nath_89 [ Thu Dec 03, 2009 11:04 pm ]
Post subject:  Re: vibrations
mine only does it in 3 or 4th when i give it a bit
Author:  Scrawny [ Thu Dec 03, 2009 11:17 pm ]
Post subject:  Re: vibrations
zukmeista wrote:
But it only does it in 4th gear???


4th gear is a direct drive through the gearbox, it may be a bearing problem in the box
Author:  zukmeista [ Fri Dec 04, 2009 12:09 am ]
Post subject:  Re: vibrations
Oh... What should I do about it? :?
Author:  Scrawny [ Fri Dec 04, 2009 12:22 am ]
Post subject:  Re: vibrations
Check the rest out before you condemn the gearbox
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