How Does A Car Drive With A 1.5 Diff?

[scarface]

i have a 2 way in my car and it doesn't make any noises, just skips in car parks, are they all meant to make noises??

[bubba]

My 2way is noisy as hell, mostly when it's cold - it either skips or the clutches chatter away. Once it's nice and warm it's barely noticeable.. might try some new oil..

Oh and it is a bit clunky but I was warned of that.. button clutch + 2way = lots of fun

Edited December 30, 2007 by bubba

[Duncan]

yeah there is nothing intrinsic about a mechanical diff (1, 1.5 or 2 way) that makes it noisey. Its the "tightness" of the mechanical diff that makes the difference, and the GTR one is pretty loose from the factory. But you can tighten or loosen any mechanical diff.

the only thing that wears out in a viscous diff is the viscous coupling. which is why they start single spinning.

[JDM032]

i got a two way n makes a loud chatter at low speeds n skips at higher speeds and holds perfectly wen driftin uphill or track lol

but yeh 2 ways make noise no matter wat but the best thing is they are LEGAL lol

[Lunatikk]

......you're not the devil?

But who's the Penguin????

[GeeTR]

*nix get'n done over by BSD one would assume

Edited December 30, 2007 by GeeTR

[SLY33]

SLY-dN, how are 2-ways legal? I had my viscous diff shimmed up in an attempt to find a compromise between stock and my fully clunky 2way cusco, but the shimmed stocky came back behaving EXACTLY like the cusco 2-way i had in it before!

Anyway, whilst going for inspection they noticed it skipping as the car was manouvered to the pits, and would not clear defect until it was returned stock.

As for noisiness, i think mine must be due to the alloy subframe collars. The clunking was so harsh, as someone mentioned, you have to explain to everyone who rides in the car that its "normal", "no its not broken its meant to be like that"!

Im looking for a diff now. thinking the OS superlock 1.5way. If its clunky ill throw some new stock rubber subframe bushes in. The idea of changing the bushes was to get rid of axle tramp, but with traction it still tramps anyway even with the alloy collars.

Whilst we're here, anyone like to kindly refresh the principle between 1.5 and 2 ways and the pro's cons?

thanks

[Duncan]

its not the number of ways that make it "clunk", its the tightness of the diff.

1 way only locks on acceleration, 2 way lock on acceleration and braking, 1.5 way locks on acceleration and a little on braking. How quickly it locks (eg under brakes) is controlled by the ramps in the dif centre. 1 way looks like "|/", 2 way looks like "\/" 1.5 way is in between. In any case they will only lock when there is a change in force ie if you are just coasting no mechanical diff will clunk.

so....if you don't want to get noticed, especially with a 1 way diff, just don't put any power in as you turn, just coast around.

pros and cons....well 1 way is perfect, 2 way have become "trendy" thru fil sic drifters with the theory that the locked diff under brakes on entry make it more predictable. I don't drift so I don't know but that doesn't make sense to me a 1 way is more predictable under brakes because its not locking/unlocking as you have more or less braking.

also a tight diff will increase your understeer out of corners because the inside wheel is forced to turn at the same speed as outside wheel - this makes the car go straight on. Especially bad in a gtr with a tight front diff as well. tight 2 way diff will also increase understeer at initial turn in to the corner

[sh@un]

i haven't read the replies, but i know a 32 GT-R with standard LSD oil in it's OEM mechanical 1.5-way diff is fine (but veerrry tail-happy in the wet), but once you change to something like the pink Redline LSD oil, it will start to bite like a mofo in anything resembling low to moderate speed corners

[SLY33]

Thanks for the refresh Duncan, 1.5way OS superlock is what i think ill go for.

cheers

[SLY33]

For reference, Just got the OS Giken Superlock Type S quoted from greenline at $1400 inc delivery. (excluding any customs that may apply)

[paulR32gtr]

Anyway, whilst going for inspection they noticed it skipping as the car was manouvered to the pits, and would not clear defect until it was returned stock.

No fun -- could have said your mechanic put the wrong oil in it! I had lightweight shockproof in (communication breakdown) and the diff was so tight the car would actually refuse to move on full lock at low speeds!

[dangerous_daveo]

I got to agree with the fellas saying the mech diffs with alloly subframe bushes are a bit much for the street. I haven't known any different, but some days especially city driving in traffic its just too much. I want to park it and walk home.

That and I think mine being old, 1 piece tailshaft, big clutch, stiffly sprung just adds to the pain, every little thing just gets transfered. Also I reallly dont like the 2way bit in the wet. I think 1.5 is the good compromise. Just dont have too soild rear end. They will clunk, and they will skip. Thats how they work, the clunk is it locking. The locking makes it skip.

[SLY33]

what do you guys think of putting some brand new stock OEM subframe bushes in, instead of even pineapples?

Aim is to get rid of the harsh clunking from the diff. Has anyone gone from stock to pineapples and noticed whether pineapples make it noticably louder clunk?

I put the alloy ones in as i thought theyd be even more effective than pineapples, which they would have to be in terms of reducing subframe movement, but honestly i dont think i couldve picked the difference seat of pants once they were changed, which is why im thinking just put stock ones in.

[bradsm87]

what do you guys think of putting some brand new stock OEM subframe bushes in, instead of even pineapples?

That's a LOT easier said than done! U've gotta melt out what's left of the squashed oem bushes, press the surrounding 'ring' out and get a new set pressed in. If u'r gonna do all that, I'd put a set of noltec subframe bushes in (not just pineapples). The noltecs will be noisier than stock tho, but probably not as loud as with pineapples.

[MRDeanos.]

i neva new wat to get when it came to diff's, i want to go circut and drift but dont want to loose driveabilty!!

i just want to do everything!!!

[sidewayssam]

haha yeh everyone who gets in my skyline and hasnt been in a car with a 2way before thinks my car is f**ked and gonna fall apart, but yeh mine is clunky n shuddery when making tight turns, all good fun tho

[bubba]

Lots of fun, I don't regret my 2way - she's very tight though and makes for funny looks in carparks etc

[sidewayssam]

haha and when ya at a petrol station and it skips and screeches and everyone looks at u like your a hoon doing a burnout haha

[CEF11E]

I have a 2 way nismo sss in my car and got it new.

it's in an R32 gtst with a button clutch, alloy cradle bushes and rb30det torque. it clunks like a bitch accelerating and decelerating in corners. I have tried all types of fluid and now am using syntrax.

it really is too much for the street i hate driving it when cops are around. i am going to take out the alloy bushes and see if it is any better.

I lived with it in Canberra for almost a year no probs, but in Melbourne traffic it is just too much.

do not put a 2 way in a daily driven car. I am going to pull mine out when i can be arsed and set it to 1.5 way and with less preload.

I have found friction modifier also helps to a certain extent.

mine seems to clunk less when it is cold. once it warms up it clunks like a cut bastard.

having said all this when you are actually driving the car it is a pleasure.