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How Do I Adjust The Backlash On A S2 R33 Diff?

WogsRus
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WogsRus Veteran

WogsRus

Posted
Posted (edited)

HI guys

I have a Serie 1.5 R33 GTST, and ever since i installed the new clutch, i have notice the backlash in the diff bad, due to the harshnes of the clutch.

Can somone point me to how, or if it is possible, to adjust the backlash on the diff?

I have read the DIY's but there is nothing there.

Do i need to take the whole diff out? Or can it be done on the car?

Any help would be greatly appriciated.

Edited by WogsRus
WogsRus Veteran

WogsRus

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  • Author
Posted

I can do all that, i race all the time, not in that car.

What i am refearing to is driving slowly through town, in second, when off/on gas, you can feel the backlash in the diff, the slack in the pinion and backlash.

That is what i want to cure.

WogsRus Veteran

WogsRus

Posted
  • Author
Posted

diff bushes, where are they, do you mean the pinaples or something else. The diff doesn't wine at all, not a bit.

Basically if move the drive shaft, the diff stangs still, and you can rotate the shaft 0.5-1cm before it meets any resistance. It's not in the drive shafts as far as i can tell.

So i am wandering if there is any way to fix this.

Cubes Grand Master

Cubes

Posted
Posted

From my fiddlings I've noticed 2 sorts of 'slack' that feel similiar to backlash in the VLSD's.

There's backlash its self.. Which whines like crap and then there's slack inside the diff center.

Then there's the slackness that comes from the diffs spider gear to center engagement.

When removing the spider gears there's (from memory) 4 or 5 lugs that lock in to the diff center that provides drive to the half shaft splines. From what I've seen these can be a tad sloppy and cause a slack ness of sorts.

With the diff out of the car and backing plate off; turn the half shafts, you can feel/see the slackness within the center as the axles move yet the diff center doesn't. You can also hear the slackness coming from the diff spider gear engagements. Now turn the input (tail shaft) and you will see there's no backlash. Hold the half shafts while turning the input and again you'll see there's no backlash but slackness 'inside' the vlsd center.

TO4GTR is right.. From what I've seen excessive backlash does = a noisy diff.

T04GTR Grand Master

T04GTR

Posted
Posted

the bushes are on the rear diff cover in the subframe. 2 round ones just above the hicas rack.

easy way to tell is under power lift off the throttle and it should thud from the back.

mine were that gonbe that i didnt have to undo the botlts at all. it just dropped out lol

  • 1 year later...
Craved Grand Master

Craved

Posted
Posted

well does anyone have a solution for the actual whining backlash ?

i have this and need it fixed if possible if someone could guide me along :laugh:

cheers

Looks likea reshim is required from my internets searching - this sound correct?

BHDave Grand Master

BHDave

Posted
Posted

You would be correct :D

There is a shim either side of the center. You put a thinner one on one side and a thicker one on the other.

The measurements part i don't know which is why mine will go to a specialist one day soon to be done.

  • 4 years later...
Manuel Kasko Grand Master

Manuel Kasko

Posted
Posted

Revived this thread to see if anyone has some answers to my question.

I have an r33 S1 and my diff has been making a thud and squeek as you throttle on and throttle off. I jacked the car up and the tail shaft has the same thing with about 1cm or so of play.

When moving the tail shaft you can actually see the parts move coming out of the diff to each wheel. This is with the handbrake on

I pulled my diff out and now am trying to work out what I should actually be doing with it.

Someone has quoted me $150 + a case of jimmy to do a rebuild but im waiting on details from him to actually know what his rebuild involves

Any help would be appreciated

  • 2 weeks later...
luke gtr Grand Master

luke gtr

Posted
Posted

Revived this thread to see if anyone has some answers to my question.

I have an r33 S1 and my diff has been making a thud and squeek as you throttle on and throttle off. I jacked the car up and the tail shaft has the same thing with about 1cm or so of play.

When moving the tail shaft you can actually see the parts move coming out of the diff to each wheel. This is with the handbrake on

I pulled my diff out and now am trying to work out what I should actually be doing with it.

Someone has quoted me $150 + a case of jimmy to do a rebuild but im waiting on details from him to actually know what his rebuild involves

Any help would be appreciated

those are the cv shafts.

with the hanbrake on, you should get very little movement from them.

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