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Gearbox Or Clutch Problem

blx
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blx Experienced

blx

Posted
Posted

I have a few noises that I am trying to sort out before I bolt on some power. I am currently in Darwin and it is a major struggle to find someone that is familiar with transmissions.

PROBLEM 1

When in neutral at idle there is a rattle from gearbox/clutch area.

Noise disappears when clutch is engaged (pushed in)

Dont notice rattle when driving, however this could be due to engine/exhaust noise.

Clutch is not standard, heavier duty however unsure as to what exactly (bought it with it in car already)

Noticed problem after service (Oil Change)

PROBLEM 2

In all gears (loudest in 1st and 2nd) there is a whine on acceleration and deceleration.

Whine increases and decreases in pitch with engine RPM.

Loudness doesnt seem to change.

Gearbox feels tight and haven't had any gear changing issues.

QUESTIONS

Does any know the probable cause of either problem and wether they are related or not?

Anyone experienced similar problem before, if so please shed some light.

I appreciate any advice/experience posted

Cheers

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The Dan Grand Master

The Dan

Posted
Posted

When you say 'service' are you talking about engine or gearbox service?

It's most likely gearbox noise going off your description but it would really depend on a few other things and how

loud it is.

I would say you should start by changing the oil in the box. Use something like an 80w140 Castrol if you can get it. That should silence it. If you were referring to a gearbox service, then the workshop may not have used the correct oil.

Birds Grand Master

Birds

Posted
Posted

Just worn gearbox bearings through the box. Sounds like the oil hasn't been changed in a long time, sludging the old oil which probably masked the sound of worn bearings throughout. Changing the oil for fresh brings out these noises. You can silence it with a different oil but the only way to properly fix it is to recondition your gearbox.

some_cs_student Veteran

some_cs_student

Posted
Posted
Just worn gearbox bearings through the box. Sounds like the oil hasn't been changed in a long time, sludging the old oil which probably masked the sound of worn bearings throughout. Changing the oil for fresh brings out these noises. You can silence it with a different oil but the only way to properly fix it is to recondition your gearbox.

Thanks, I've had the same issue since I bought my car, had the diff re-built, changed oil twice now, still whines, I guess it will need a recondition at some point :P

wlspn Proficient

wlspn

Posted
Posted

Problem 1: Had exact same noise in my R32 & R33 boxes. Would bet it is the cluster-shaft bearing located in the seperator plate. cop to get to as whole gearset needs to be removed from shaft but if you can do the work yourself its only like a $40 bearing

Problem 2: Have you turned your stereo off? haha. Im not hanging shit, just my mate complained to me for months about a high-pitched noise in his GTR, increasing with revs. Finally took it for a test-drive for him & worked out it was from his amplifier wiring.

Anyway good luck

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