Jump to content
SAU Community

Recommended Posts

Gday,

I just ran in my new Kaaz 1.5 way diff doing the figure 8 thing for 30 mins. Jeez i copped some strange looks while i was doing it in a car park.

Anyway, the clunk noises have become considerably less after the run in procedure, but the diff still makes noises (clunk, clunk) sometimes when turning a tight corner. Is this normal? Im hoping the noises will disappear completely after i change the run in oil. Should i change the run in oil to new Kaaz gear oil immediately after the run in procedure, or should i drive around a bit before i put new oil in?

Thanks for any help.

Shaun.

Link to comment
https://www.sau.com.au/forums/topic/244692-just-ran-in-my-new-kaaz-diff/
Share on other sites

bud how do you rate the 1.5 kaz dif? im kinda in the market for one hey - is it sexy?? :laugh:

I reckon my paintjob on the diff housing is sexy; dunno about the diff itself though. I havent given it much stick yet because ive only just run it in and still have the old oil in it. They reckon if the clutch packs see too much torque during the run in period, they can bed in at an angle and result in less than perfect operation. I hope the noises go though. It did seem predictable when i was doing tight figure 8's and sliding a bit.

Shaun.

post-11456-1226561627_thumb.jpg

yes it will always go clunk clunk,no matter what you do.ive got a 2way kaaz in mine even worse,but i hardly ever drive my 32 on the street.

Did you do the run in procedure figure 8 thing like it said in the book??

Feels like the whole rear cradle falls off when it clunks.

Shaun.

Changed the oil today with new Kaaz gear oil and went for a good run to Brooklyn along the Pacific Hwy. Its getting quieter all the time and only clunks every now and then. Im happy with the diff, but fcuk it pushes you to understeer out of corners. I wasnt prepared for it a few times, but getting used to it now; nice and predictable. Is this (understeer) what mechanical diffs do or am i just a sh1t driver?!

Shaun.

Did you do the run in procedure figure 8 thing like it said in the book??

Feels like the whole rear cradle falls off when it clunks.

Shaun.

don't stress too much. most mech LSDs are a bit like that. my nismo 2 way is like that in the S13. its worse if you have good tyres (as they don't break traction as easily). in tight turns the whole rear end clunks and kind of shimmys a bit and yes it sounds and feels like the whole cradle is about to break off! but it's quite normal. :banana:

Changed the oil today with new Kaaz gear oil and went for a good run to Brooklyn along the Pacific Hwy. Its getting quieter all the time and only clunks every now and then. Im happy with the diff, but fcuk it pushes you to understeer out of corners. I wasnt prepared for it a few times, but getting used to it now; nice and predictable. Is this (understeer) what mechanical diffs do or am i just a sh1t driver?!

Shaun.

the understeer thing is normal too. especially when you are exiting slow corners and the engine is not in it's power band,. not enough power to get the rear sliding, but enough to lock the diff so of course it tried to push you wide. it happens a lot with the 2 way too. you will get used to it though as adjust as needed.

the understeer thing is normal too. especially when you are exiting slow corners and the engine is not in it's power band,. not enough power to get the rear sliding, but enough to lock the diff so of course it tried to push you wide. it happens a lot with the 2 way too. you will get used to it though as adjust as needed.

Yeah, i kinda like it. Makes it feel a bit like a race car. It feels really predictable which is good; i never knew what the standard one was going to do.

Cheers,

Shaun.

that is one of the big benefits of a good mech LSD. it behaves the same way under the same circumstances, so you know what's coming! stock LSDs are rubbish. people say 'well i shimmed it up and it's great' but I can tell you now no one who has drive with a proper LSD would ever say that. even the shimmed up viscous LSDs are still complete pants!

especially with decent power LSD is a must. :banana:

I have the Cusco RS that has springs in it that damp the clunking a bit... still makes some noise tho but you can keep it quiet by staying off the throttle when you have lots of lock on the wheel... just kind of coast round corners... when driving quickly it pays to be a bit more aggressive than you would with the vlsd, takes some time to adjust but it amazed me how much more grip a good mech diff gives... 2 ways aren't as scary as people suggest either

Hey Shaun,

It'll always clunk mate, but add a bit of Penrite LIMSLIP and it should quieten it a bit. Worked really well with my old lsd.

Cheers,

J

I used to use that oil for the cusco rs 2-way and it works quite well, but then I tryed the Sin 75w90 sythetic penrite lsd oil and my god it settled down heaps, though I wouldn't use synthetic for a run in oil.

The clunks will never go away completely but the right oil will settle them down dramatically.

passengers are constantly telling me my car is broken...

i have a 2 way and it clunks under acceleration and braking so if you go thru a corner without accell or decel it will not clunk at all. but it is a fine balance.

I am going to pull it apart and redo the shims and put the penrite stuff back in as it seemed to be the best,

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Thanks everyone for the replies and suggestions. Got the seats out (hoping I could find some existing grommets but no such luck). By tapping and measuring etc. I could figure out where I could drill through if needed. But first I borrowed an inspection camera and managed to go through factory holes in the chassis rail and could see that the captive nut was holding steady which is why it could retighten. So it was indeed a stripped section of thread, so I applied downforce by levering the bolt head with a screwdriver and went slowly back and forth until it came out. Camera helped a lot cos I could monitor that the captive nut was holding tight. Now I just have one very seized main subframe nut to tackle 馃槄
    • BOVs do have a purpose, if you ever log pressure before and after the throttle body, you will see a spike pre throttle on lift off from a WOT condition. Enough to bend throttle blades / damage e-throttle motors or simple assist in blowing off cooler pipes. FWIW, the above on really applies to those running at least 2 bar of boost. OP shouldn't have an issue, on the other hand, here are some videos of my shit box over a decade ago with some succulent dose with the airbox on and off. That shit box is unrecognisable these days 馃珷    
    • I've tried all different combinations of BOVs/ no BOV and stock bypass valves over the years, on gear changes the stock bypass valve seems to get the car back on boost quicker because in part the turbos wheel speed isn't being slowed down by reversion, although they have issues holding boost much over the stock setting. Most aftermarket BOVs you can adjust the spring, tighter will make it open later and close sooner, but in my experience it'll cause a bit of flutter at low load/rpm anyway. I've also got some input into this whole no bov causing turbo wear, never had an issue on any on my turbos HOWEVER, I got my R33 GTST with 200k kms on it, with from what I can see still has the original turbo, no lateral shaft play but has about 4-5mm of play in and out which to me seems like a worn thrust bearing from years (100-150k kms?) of turbo flutter running no bov, so maybe there is some truth to it in the long run. But that'll never stop me loving the Stutututu while I have the car.   OP just wants to know if he can run a atmo vented BOV with no major issues and the answer is YES, plenty of people do it, there's no harm in installing it and seeing how it runs before spending $$$ on an aftermarket ecu, last time I bought a Nistune it was $2400 for install and a tune , unsure of todays prices but you get me. Crazy money to spend just to fix the minor inconvenience of stalling that can be overcome by letting the revs come down to near idle before putting the clutch in or a little bit of throttle to avoid it. You're better off leaving the ecu and tune for after a bigger turbo/injectors have been installed to take full advantage of the tune and get your moneys worth.   Let OP have his Whoosh sound without trying to break his bank haha
    • I see you missed the rest of the conversation where they have benefits, but nothing to do with avoiding breaking turbos, which is what the aftermarket BOV made all the fan boys, tuners, and modders believe was the only purpose for them...
    • But they do so for the other reasons to have a compressor bypass. It's in the name.
  • Create New...