WELDED DIFF, need CHEAP diff bushings.

[gotta240]

I just had a spare diff welded, and before installing it i noticed the front bushings are GONE. :-(

Long story short, i'm setting the car up for optimum handling and i've heard mixed reviews about welded diffs affecting high speed corning abilities.
SO, i just want to throw the diff on the car and see what i think, AND i DONT WANT METAL DIFF BUSHINGS. They are too loud for the benefits you get out of them imo.

My question is- what are the CHEAPEST diff bushings sold? Do they sell OE bushings? I dont want to drop 100 or 200 bucks on bushings just to TEST a diff out. I may very well just use a vlsd i have sitting around.

[robertftw]

measure the old bushing and find one that works if you cant find an oe bushing.or just put the diff on and see what you think you should be able to tell the difference between the diff and worn bushings. good luck. p.s. what diff are you using?

[gotta240]

i mean there is NO bushing there at all. Like GONE! I don't think i even want to test it like that... anyone know if the dealer sells em?

The diff is just an s14 open diff, welded everywhere.

[orion::S14]

Use OEM S14 or J30 bushings...

- Brian

[gotta240]

So they still make them? Any sites i could order them off of?

Due to schedule, i'll be unable to make it to a dealer before the event... :-(

[ManoNegra]

ever heard of a place called a junkyard?
optimum handling... welded diff... really?

[ladiesman8527]

i got nismo diff bushings for a good price from courtesy parts.

[gotta240]

ManoNegra- are you kidding me man?

Have you ever touched your diff? If so, please explain how i'm going to get a bushing out of the diff while IN the junkyard?(and no, i'm not going to or allowed to bring a 20 ton press in there)

also- yes, i'm going for optimum handling... I've heard mixed reviews on a welded diff and handling...if you have an opinion or experience with this...please explain.
thanks!

[LB.Motoring]

ever heard of a place called a junkyard?
optimum handling... welded diff... really?

you know they make a 1.5way diff.... highspeed cornering...

[gotta240]

yes, i know about the 1.5 way diff. Im short on cash at the moment, had a few diffs laying around, and just want to experiment... ALSO, it will be nice to try out on this weekends drift event...

[codyace]

Optimum handling and welded diff are about as backwards as you can get.


Ultimatley, a nice gear type LSD (Quaife comes to mind) or a Helical (S15) will be 'best', however aside from that, a nice 1.5 Kaaz/Nismo/Whomever will be your best bang for buck.

And waht bushings do you speak of, the two on both sides of the input?

[gotta240]

yup... the bushing on both sides of the input. Looks like they are pressed in sleeves, with a bushing and sleeve inside.

While were discussing diffs.

Can somone explain how taking a turn between 70-90 mph will be different with a welded versus a 1.5 or even 2 way? If im not mistaken, the 1.5 is fully locked on accel. Wouldn't that mean it would feel the same as a welded diff untill you get off the gas? Or does it still allow one tire to spin faster than the other at high speeds?

[dct223]

um... gotta240... have you even seen s14 diff bushings??? they SLIDE OUT without a press, that is why you can go to a junkyard and pull a diff from a s14 and get them, you dont need a press...

or are you saying that you need to get the diff bushings that are on the SUBFRAME replaced?

and.. welded diff for optimum handling.. i dunno about that... you can still manage with a welded but for BEST HANDLING.. a VLSD, HLSD, 1.5way def will perform better...

and the cornering speed between welded, 2way, and 1.5way really depends on how sharp of the corner is.....

[FaLKoN240]

um... gotta240... have you even seen s14 diff bushings??? they SLIDE OUT without a press, that is why you can go to a junkyard and pull a diff from a s14 and get them, you dont need a press...

Davis is right.

Gotta240 YOU need to look at your bushings before you start making shit up.

You can put the diff bushings in with your fingers, while consuming a sandwich. :mrmeph:

[codyace]

Can somone explain how taking a turn between 70-90 mph will be different with a welded versus a 1.5 or even 2 way? If im not mistaken, the 1.5 is fully locked on accel. Wouldn't that mean it would feel the same as a welded diff untill you get off the gas? Or does it still allow one tire to spin faster than the other at high speeds?

If you're in a turn at that speed, you really aren't worried about it (you are, but not as much) Where I would be leery of the welded diff are in tight carosels/hairpins, wehre you run hard, brake hard and let off the gas and turn tight....with both tires spinnign equally, it's going to be VERY hard to keep momentum through as you're sliding to the outside of turn. The 1.5 will unlock, and let you rotate the car faster, as it acts 'open' in tight curves, allowing the car to come right around, enabling you to hit the gas sooner on exit.

[gotta240]

haha. Well, again I make an idiot of myself. I apologize for any smart ass comments! lol.

YES, i have three diffs sitting around, all of which i removed myself. I was actually just trying to fit misc. urethane bushing in the hole with the missing bushing. I guess i never tried to push the "good" one out!

thanks and my bad!

I guess i'll just take one off my spare diffs! Hopefully the j30 ones will work.

[chmercer]

Optimum handling and welded diff are about as backwards as you can get.


Ultimatley, a nice gear type LSD (Quaife comes to mind) or a Helical (S15) will be 'best', however aside from that, a nice 1.5 Kaaz/Nismo/Whomever will be your best bang for buck.

this thread is drowning in shitty information, gt500 runs spools in the dry (solid (welded)) and 2 ways in the rain. nobody runs quaifes except like autocrossing civics and bullshit like that. any decent race car will run a spool or a 2 way.

[gotta240]

my head is starting to hurt with all these different ideas on welded diffs!!

[codyace]

this thread is drowning in shitty information, gt500 runs spools in the dry (solid (welded)) and 2 ways in the rain. nobody runs quaifes except like autocrossing civics and bullshit like that. any decent race car will run a spool or a 2 way.


I"ve drivin a Quaife car at the track, and loved the way it worked. Granted it was on a smaller more technical track (pocono south) it was still great fun...not of that od rpm slow curve lock/unlock/lock/unlock when behind someone.

The 2 way I drove (granted it was cold) would constantly lock under hard braking and really throw the car into an unstable condition. Granted throttle input could usually correct it, it was still something I prefered not to use or have.

I have a 1.5 way in mine, and absolutly love it. Those with viscous prefer mine, and even one local kid with a welded diff s13 preferes the way mine works.


And FWIW: When you mean spool, what are you using that term to cover? I know my experience in this (the spool area) spectrum comes from the v8 RWD land, but Spools (correct as you say) permemently lock in the differential all the time (this acting welded) however the majority can generally be slected on or off (like Air Lockers, TrueTrac systems, the sort) I think one japanese oem also offered an an electronic locker at some recent point (either Toyota or Suzuki, can't recall). I'm have a hard time believing that GT500 cars run a full out locker/spool rear that isn't speed/or load bearing to unlock and lock at certain times. Not saying they don't run spools at all, just saying I have a hard time believing. (As I really have zero clue)

[codyace]

Well did some research:

http://www.sportcompactcarweb.com/features/0504_scc_nissan_skyline_gtr/index2.html


I'll admit to being partially wrong about SuperGT cars and their diffs.

[ManoNegra]

damn, I missed all the fun!
gotta240 - no sweat man. I've been fondling differantials for years. Drove on a welded diff and hated it.
Got laying around still. $80 and is yours btw :coolugh:

And I don't see the problem with using solid metal bushings, that's essentially how S13s are.
Some people actually install aftermarket LSDs into S13 pumpkins then slap them on S14s for this exact reason.

[codyace]

Well did some research:

http://www.sportcompactcarweb.com/features/0504_scc_nissan_skyline_gtr/index2.html


I'll admit to being partially wrong about SuperGT cars and their diffs.

I'll add to this /\ /\

This topic had me baffled to the ponit where I went downtown today to a local Porsche Race Shop (Dawes Motorsports) to talk to some of the guys about what they fun in their track cars. They said most 944 riders prefer the spool, as it's just what the car natually reacts with best....however they said that alot of the turbo 911 bases cars run Quaife mechanical diffs on high speed tracks, and swap out to clutch based 1.5ways on tight technical courses. They said fully locked spools are garbage in the 911 based cars.


Just more food for thought. I know they are POrsches and not Nissans, but just something to run with

[dct223]

saw that JGTC GTR in action.... fucking amazing....

[chmercer]

yeah by saying spool i just mean like welded diff. as in, not differential haha. it dosent necessarily feel the best, just for most types of racing its just constant power delivery to both wheels is usually the fastest

[UNITEDMASTER]

Get a full diff rebuild kit,& take it to an expirenced diff shop(unitrax)SOCAL,have it put together & backlash set,DONE DEAL go beat on it.IMO ONLY

CMERCER-Im feelin the swastika

[chmercer]

umm thanks? www.reclaimtheswastika.com

[gotta240]

LIES!!!!! ALL FUCKING LIES!!!!!! lol

Alright, i grabbed a sandwich as advised and went to remove my one remaining diff bushing... NO LUCK.

Are you positive they aren't pressed in? Were talking about the two in the FRONT of the diff on either side of the input shaft....right?

I tried to slide it both ways, no luck. I even grabbed a screwdriver and a sledge and tried to pound out the metal insert w/ no luck.

SO, what is supposed to "slide" out? Is the metal sleeve and rubber that go in the diff supposed to slide out, or just the rubber in the sleeve? It looks to me like the rubber is supposed to be attached to the sleeve as the "bad one" is just a sleve with a little rubber remaining on the sides.

[wootwoot]

Quoting Wikipedia.org <3 Wikipedia

"Spool

A spool limits differential rotation to exactly zero. A spool consists of a pinion & ring gear only, the centre is solid, the axle is one piece. A mini-spool is similar, replacing the usual diff centre with a solid piece, retaining the factory axles. Technically a spool is not a differential at all, but is used to achieve a similar effect to an LSD on some street & race cars."

for entire article go http://en.wikipedia.org/wiki/Limited_slip_differential

p.s. from Wikipedia links

http://www.kaazusa.com/introductionToLSD/introduction_To_LSD.htm

http://auto.howstuffworks.com/differential.htm

<3<3<3 Wikipedia

[1991ka24des13]

umm i have a welded diff and it does not corner worth shit!! but for drifting its good!! but i was racing my step brother this morning on dry pavement getting on the freeway and i was coasting around the corner getting on the freeway and the rear end comes out easily with it welded but if ur looking for high speed cornering go with vlsd or something else... thats my 2 cents but im still new with 240s!!

[gotta240]

thanks!
Now can someone please just answer my question 2 posts above? thanks!

[!Zar!]

It's just a piece of hard rubber that looks like a, "T" and it slides out. Soak it in some pb blaster if you have to.

It should be easy as hell. I don't see why you are having such trouble. Unless they were put in upside down some how. If that is the case, or it it's even possible, you'll have to remove the diff.

[gotta240]

The diff is and has been removed.

Its actually a METAL sleve with rubber bushing inside of it. The piece(on both diffs) didn't "SLIDE OUT" at all. They had to be beaten several times with the appropriate sized socket and 5lb sledge.

Thanks for the help though. Diff should be on tomorrow. Thanks again