So My Lsd Finaly Blew, Or Atleast I Think?

[NateR31]

so the other day after a major tyer warming session, as i was driving home id drive off for a bit and when i changed gear i could here a slitgh chatter just befor it grabs, but it only starts now and then, do day it was doing it real loud, so i got a mate to drive the car past me and with the clutch in you can hear click chatter and its really noticble from the rear end of the car, i jacked up the rear and when i turnd the wheels the other one turned the same way, shouldnt it turn the other way with a lsd? What else could it be?

[GTAHH]

They both turn the same way for LSD. If it was the diff it would be fairly noticeable. Try doing a U-turn on full lock taking off normally and see if you get some rear end shudder

Cheers

[VB-]

what sorta LSD u got? arent aftermarket LSD's known for being loud n clunky?

[NateR31]

standard crappy bogwarner

[VB-]

standard crappy bogwarner

well, both wheels should turn the same way, so thats a good start. borg warners are always noisy, althought htis noise i dont often here of.. just thrash it till it blows up and replace it with an aftermarket diff/weld it up, ether that or ring a diff specialist, they should have som indication of what it might be

[Baz]

You sure its the diff and not the gearbox which is making the noise?

[NateR31]

You sure its the diff and not the gearbox which is making the noise?

see, im not sure, and im damn hoping its not the gearbox, as its only around 30,000kms old and its a r34GTT item, recently did the oil with blue redline gear when i did the clutch..

the noise only seems to come on after a quick thrash, it sounds like when the clutch fan hits the intercooler piping, if anyone has heard that noise befor..

It only comes on when the clutch grabs and you dont allerate, if you hit the gas the noise goes away, but say youre slowing down and just pop it into gear and let that slow you down the noise will come and stay untill you press the clutch, or hit the gas..

if you get what i mean..

[Sick_R31]

in your avatar it says you got a RB25 coupe, the coupes don't have a borg warner diff they have a R200 longnose diff or is this a different car?

[slip]

wierd. the borgs that were on their way out that i've heard have all made metallic noises when turning, or taking off, going round slow corners etc. still sounds like diff though. can you jack it up, run the car in gear, rev it then back off and see if the noise happens then?

+ specs on car dude.

[VB-]

if its happening when ur slowing down etc, maybe something with the crown and pinion, like when u accelerate, the gears mate nice and normal, when u back off, and the car is being slowed by the 'box, the stress might be on the opposite face on the teeth on the crown wheel... : if that makes sense... i dont know if thats really logical, its something that just came to me then...

other than that, have u checked ur oil levels in the diff, how old is the oil?

somebody said before about the R200 not borg warner thing, im assuming u transplanted the rb25 into a R31.

[NateR31]

in your avatar it says you got a RB25 coupe, the coupes don't have a borg warner diff they have a R200 longnose diff or is this a different car?

hey bud, nah this isnt my coupe, this is in my 25powerd 4door slio.

[NateR31]

if its happening when ur slowing down etc, maybe something with the crown and pinion, like when u accelerate, the gears mate nice and normal, when u back off, and the car is being slowed by the 'box, the stress might be on the opposite face on the teeth on the crown wheel... : if that makes sense... i dont know if thats really logical, its something that just came to me then...

other than that, have u checked ur oil levels in the diff, how old is the oil?

somebody said before about the R200 not borg warner thing, im assuming u transplanted the rb25 into a R31.

Hey that makes sense, and im hoping thats what it is lol, Well i had a look under and the diff has a hole lotta fresh oil around it which made me smile as im hoping its the diff not the box..

But this only happens when i give it a slight gun..

Yeh this is in my 4door R31, not the coupe, coupe has a R200, this 4door beast has a bog warner, pushing around 200rwkw, befor hand it was taking around 80rwkw with the rb30e lol

[slip]

yeah i was thinking what VB said too, but I couldnt really explain it like that.

i got a reco'ed lsd centre put in my single spinner for $500 for a price guide.

let us know how you go man. mines doing 233rwkw through the diff now and it seems good.

nate give us some specs on your cars dude. youve got 2 x 25'ed 31s???

[Sick_R31]

yeah as VB said backlash between the crown wheel and pinion it is a common thing with the BW78, they also whine like a bitch before they start to open wheel. probably needs a good shim, oil and gasket replaced and you may need the side gears replaced all up should cost $500-$600. if you are going to be doing drift, drag or track work then a reshim would be pointless as the diff won't last very long at all, your options are a mini spool ($100+fitting) or a Kaaz 1.5 or 2 way LSD ($1500+fitting)

[NateR31]

Hey guys, ive got a 31 wreck here, so ill whip in the single spinner and see how that goes, hopefully it is the diff making all the noises.

[R31 POWER]

I had a weird noise once it warmed up,it was the wheel bearings.It's a strange noise.