Question about 1990 Nissan 300ZX

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1990 300z. I got a 90 300zx non turbo. My rear end vibrates when i start driving over 40., do i have to change my flywheel, wheelbeering, or do i need a whole rear diff change?

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  • avneeltilak Jun 23, 2009

    Is there a reason why it starts feeling hot by the gear box. It seems as if something is grinding against the gear box through the whole back end



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It is the problem of aligiment ... get it fixed at tyr shop ask the shopkeeper to do so...

Posted on Jun 23, 2009

  • Azum Saeed Jun 23, 2009

    yes it happenes when breaks have got jamed and are in contact with wheel all the time.. and wire to breaks are not responding and have reached above there extention limit...



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Could be universal joints if rear wheel drive , you can physically see by checking the drive shaft at each end. If its that bad it will fall. Also could be tires out of balance

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Loud noise when accelerating

I would look into the rear end gears and the yolk assembly on both ends of you drive shaft. If they removed the trans they had to remove the drive shaft and this would mean that the universal joints may have been removed also. failure to mark the points of the original installation or even where the splines were connected will result in in unbalanced set up. fine tuning is done on these vehicles and balancing is done on each piece then again after assembly to ensure perfect symmetry to prevent any vibrations and or noises from out of balance problems that may occur especially when you car may be traveling at high speeds. I mentioned the rear end gears also because if there was a problem from anything that was done and there was a possibility that they had to remove you pinion gear for some reason, again if not marked and placed back in the exact same position you will get noise in the way of wurring or cycling trembling vibrations due to out of balance and gear tooth wear mostly noticeable under load or high speed. A turbo noise will only be heard when the turbo is spinning and will usually have a high pitched sound, if there was a bad blade you would know it right away and doubt you would be able to drive it safely since they spin at rates of up to 150,000 RPM I doubt it would stay together very long. Most turbo problems are from bearing wear due to improper oils usage or overheating due to improper oil or poor/lack of heat shielding systems.

I'll bet it's a drive line balance problem, you should be able to see dots of paint that were placed on the drive shaft, universal joints, yolks, rear end spline and trans output shafts. Lack of seeing these dots will point to improper assembly and unbalanced drive line. Of course you cannot see inside the rear end to check the pinion gear placement, you would have to remove the cover and should only be done if you find that there was in fact improper reassembly. It would be smart to know if there is evidence of other bad assembly done, improper alignment of pinion gears will result in failure very quickly.

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hi david

i have a merc c250 td manual.. i had a accident about a month back... i changed all the mountings... wen i start the car it has a bad vibration throughout the whole car and if i rev it, it gets worst... can it be the main engine pulley or the flywheel?

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G'day Just wondering how much oil i need to put in my Audi A4 B5 1.8L Non turbo 4 cyclinder, 1996 model. Cheers,

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  • Hope this helps and thank you for using FixYa.

Regards, Tony

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How to change flywheel on 1990 300zx non turbo?

pull the transmission. remove the torque converter (automatics) or clutch and pressure plate (standards), the bolts for the flywheel are under that. make sure you replace the flywheel with the proper one especially if it's a standard.

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Vibration while driving

need to have front tires rebalanced

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My 2003 rav 4 vibrates on rear end while driving ,i hav a 2litre turbo diesel as i move up the gears it vibrates all through the car when u get to a steady speed it stops vibrateing ,even when u let the...

I would suggest having your universal joints checked out , sounds like a bad joint or bearing somewhere in the rear end, if you can get your speed up to about 50, put your rav in neutral and let it coast if it stops vibrating, it most likely is your problem

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