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Whining noise in gear and when gas pedal is pressed


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Aup guys,

I've been enjoying some trouble-free miles on my starlet, following turbo kit upgrade, it goes like a stabbed rat! Until a few days ago when a whining noise started.

It happens mainly when I'm gear; when I take it out of gear and coast, the noise goes away. The whining noise also starts occurring when i press the gas pedal down.. It sounds almost like a belt slipping noise.. It's not really loud but it is noticeable.. I have noticed that I'm getting boost slightly later after this noise developed.. It still goes in and out of gear perfectly fine. If anything, the clutch pedal does feel a bit softer..

I'm starting to think its the bearings in the gearbox that need replacing, I'm not a 100% sure but considering noise occurs when in gear points in that direction...?

So I came across this kit: https://www.ebay.co.uk/itm/TOYOTA-STARLET-GLANZA-V-EP91-4EFTE-GEARBOX-REBUILD-BEARING-AND-SEAL-KIT-OE-JAPAN/301907060682?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D50428%26meid%3D35af42e8edf7441fbfa174dbfa7a80c1%26pid%3D100675%26rk%3D1%26rkt%3D15%26sd%3D301907060682%26itm%3D301907060682&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3Ad4a7632c-3267-11e8-8cff-74dbd18051fd%7Cparentrq%3A6bdf42b11620ab6bc78a0923ffff0378%7Ciid%3A1

I've got an aftermarket LSD gearbox and I was wondering if anyone has replaced the bearings in the link above before? Is it a difficult task? Or is it recommended that I remove gearbox and get bearing replaced by specialist?

I'm not 100% certain on the issue itself so all feedback is welcome!

Also, I'm using the car as daily atm as the Civic has gone in for it's MOT and some bodywork... Is there a risk that my gearbox could fail/blow if I continue using it with faulty bearings?? I'd rather make arrangements for another temporary car rather then blow an LSD gearbox up..

Been a while since I posted some pictures. Here's some from last weekend following a wash and wax oil treatment underneath... :)

 

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Okay, so on further inspection, noise seems to be coming from Pulley side and not gearbox side :s.... Maybe worn bearings on the alternator. Belts are also soaked in oil due to an oil leak, may also be that.

The belts are super tight however... 

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