Author Topic: is my diff toast & options?  (Read 985 times)

Offline scooby_si

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is my diff toast & options?
« on: April 19, 2005, 09:21:01 PM »
Booger got my rear spoiler back on but inevitably another mishap may now be looming.....
Basically my car has started making a clunking, kinda like a steroid abusing wood pecker, sound at varying speeds & such like. My first thought was that it was just something stuck to wheel or sumin but sadly not. It was definately related to speed of vehicle as it was in time with rotation of the wheels which was measurable by my ear at slower speeds.....
Next thought it might be wheel bearing or sumin but way too extreme & dispight early thoughts dont think it\'s coming from wheels. Bloke who fitted spoiler reckoned it was exhaust or drivetrain related which thinking about it on way home made me think diff? Is there anyway this could be related to exhaust+diff, coming into contact or similar?

Symptoms are as i said relative to speed of vehicle & seemed to do it more notably when clutch was engaged when changing gear etc, & less so when accelerating...also a kinda squeaking at certain speeds which i wood normally of said was the readdition of the spoiler & associated rattles but it did also seem related to movement of car/wheels so presume thats same thing. At slower speeds did also "feel" like it was coming from the rear centre possible....could this be other than diff me thinks?

One thing i noted before these symptoms was a kinda hissing coming from the rear of vehicle which sounded like & i thought was just the sound of the rain water on the tyres but still did it when i came to a halt was a bit disconcerting but i figured it may of been the vehicle behind as it didnt last that long but does seem a coincidence too far now i think about it.

Still puts the power down well so not like it\'s poo\'d itself Brian stylee ;)

So any thoughts on what it is could it be sumin as silly as a leak which has drained all or some of diff fluid & all it needs is topping up or are we on the road to boogered diff & needing to replace or any other potential causes, exhaust or otherwise?

If we are talking dead http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/15/15_6_25.gif\' border=0> dodo diff what are options with aftermarket diffs. 2 way & 1.5 both harsh at slow speeds? what are real pros & are there any uprated over standard or equal to but not total bastards to drive round corner ones?

Cheers
Si (& impending credit abuse me thinkshttp://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/10/10_12_8.gif\' border=0>)

J4P RX

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is my diff toast & options?
« Reply #1 on: April 19, 2005, 09:30:37 PM »
My 2 way isnt that harsh at low speeds.  Noticable pulling out of junctions or parking, and a bit clunky from first into 2nd.  Downshifting if fine if you match the revs, else a bit clunky.

It would depend on what diff you get though.  Nismo ones are known to be a bit quiet, compared to say a Cusco which is a bit noisy.

Offline scooby_si

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is my diff toast & options?
« Reply #2 on: April 19, 2005, 09:48:18 PM »
Kaaz is a possibility.........?
Si

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is my diff toast & options?
« Reply #3 on: April 19, 2005, 09:50:51 PM »
To be honest, unless you have a reason for wanting one id stick with stock diff.

Trackdays/drag or drift would all see a benefit but not realyl road driving.

Offline scooby_si

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« Reply #4 on: April 19, 2005, 10:00:31 PM »
yeah but if i have to replace it i\'m always tempted by better bits & to be honest i dont drive it that much on the road anyway at least leasurely ;) & i was guna get a diff brace b4 i did 1/4 thing anyway so if it is boogered, which is main confirmation i really need from this, i maybe easily seduced http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/11/11_15_1.gif\' border=0> lol
Ta
Si

rx7veilside

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is my diff toast & options?
« Reply #5 on: April 20, 2005, 05:46:05 AM »
have only ever heard one uprated diff and boy does it make a racket people will think ur driving a bucket of ****.my clutch is noisy and as soon as i have funds its out of there.no good having a superb looking car that people think is a bag of bolts

Offline scooby_si

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« Reply #6 on: April 20, 2005, 07:09:05 AM »
my first thought is that hopefulyl sticking fresh oil in it might solve it although as noise does seem to be, technical retard guess mode on, a worn bit that keeps cycling round rather than a constannt clunking as soon as any of diff moves it maybe sumin more physically damaged? Dunno if thats just me being a dick & not understanding how diff works or anything, any thoughts folks?
Ta
Si
« Last Edit: April 20, 2005, 07:11:38 AM by scooby_si »

Offline scooby_si

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« Reply #7 on: April 20, 2005, 07:14:35 AM »
& retard mode continued how, where, pictures & FAQ for the ignorant would be good, do you change check or otherwise diff oil?
Ta
Si

J4P RX

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« Reply #8 on: April 20, 2005, 08:35:34 AM »
Dont know about stock diff Si, but if you do get an uprated one you would need to change its oil with pretty much the same mileage as engine oil.

And you need to be careful about running the right oil for the diff.  Most of them dont like synthetic.

tr8theshape

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« Reply #9 on: April 20, 2005, 09:43:51 AM »
Does it feel any different? I would though it would feel rough if it was showing signs of wear.  Does it whine also?

If it\'s already stuffed changing the oil won\'t help much.

Offline scooby_si

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« Reply #10 on: April 20, 2005, 12:55:44 PM »
yeah thinking about it it you can feel the grinding as it makes the noise & was a bit juddery when it was in a full on clank clank moment, so i\'m thinking it\'s boogered.
Talking with some of the tuner folks sounds like it\'s be centre thingy rather than bearings as it is a rotating kinda regular(ish) noise rather than a constant whining so dont sound like bearing although if it dont show yet my knowldedge of diffs is limited beyond belief...;)
Didn\'t realise that about changing oil so regularly on uprated ones, cheers bud, what\'s the theory on how often are you talking every 3k miles (presuming it\'s not all drifting ;) lol?
From descriptions i\'m not guna go 2, as i dont fancy locking up when trying to slow down, but i may go 1.5.
Keep the thoughts coming....as i lack thought :p lol
Cheers
Si

J4P RX

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« Reply #11 on: April 20, 2005, 02:24:30 PM »
Yes im going to be changing my diff oil every 3k.

They actually recommend less than that I think, but as most of my driving will be road with just the odd drift event instead of the other way round like in Japan 3k should be fine and is what a lot of people have been sticking to.

1.5 way still locks on deceleration, but only by about half as much as a 2way.  Acceleration only is 1 way.

Its not the widow maker it sounds like.  Its more progressive.  If you let off whilst sideways instead of snapping back it just continues to slide but slowing down.

Any of these diffs are likely to make the car more understeery as the rear simply has more grip than it used to when you try to turn into a corner.

Lee

Offline scooby_si

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« Reply #12 on: April 20, 2005, 06:16:56 PM »
so what\'s the crack with the types of oils to use you were referring to, i have some royal purple goodies on their way......
Si

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« Reply #13 on: April 20, 2005, 06:46:00 PM »
Not sure.  It depends on what diff you use.

Im using synthetic stuff, but the Nismo diff is the only one I can think of that does use synthetic oil.

Offline scooby_si

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« Reply #14 on: April 21, 2005, 05:57:45 PM »
KAAZ 1.5 is on the cards :D
Si