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Replacing R34 Diff Bushes What's Involved

V28VX37
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89CAL Grand Master

89CAL

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I had intenitons of doing a proper write up, but must have got lazy and just put the photos in that thread.

FYI, i didnt have to use the supplied washerto space the diff anywhere, I think it might be for S-chassis? Or maybe Z32. But anyway.

I find when I drive around in the wet for a little while I end up getting a fair knock in the back. It scared me a bit the first few times, but now I know what it is, I dont think about it so much lol. Would be nice to fix it, so maybe I will put the super-pro ones in one day. Want to do subframe bushes so should do it all then

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hardsteppa
hardsteppa

Yes u should def do subframe bushes while subframe is out, If u end up removing it. Tierod ends on rear aren't a moving part and nothing on them to wear, so would assume they mean the hicas balljoints

89CAL
89CAL

My front ones came out easily and I got the rears out by cutting them with an air hacksaw then knocking them out. Is cut through the rubber and just enough of the steel to split it in 2 halves without

zoomzoom
zoomzoom

Im not sure about HICAS ones, but the regular ball joints in the lower control arms are quite easy even with a 6 ton press. You just need the right bits of scrap metal pipe to press the body of the ba

V28VX37 Veteran

V28VX37

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I find when I drive around in the wet for a little while I end up getting a fair knock in the back. It scared me a bit the first few times, but now I know what it is, I dont think about it so much lol. Would be nice to fix it, so maybe I will put the super-pro ones in one day. Want to do subframe bushes so should do it all then

So you reckon that's the rear side bushes of the diff? Sounds odd, especially if it's only in the wet.

Is anyone else running the Nolathane/Whiteline diff bushes, how are yours going?

89CAL Grand Master

89CAL

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Only because they used to be press fit bushes. The front diff mounts I have are whiteline ones but they are a similar design to the standard ones anyway.

Im relatively sure its the rear bushes. Its not a big issue. The noise goes away when it all dries up. But it does annoy me a little

V28VX37 Veteran

V28VX37

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Diff is back in with SPF bushes in front and Nolathane in the rear. I am not super impressed with the Nolathane ones either, they don't feel super tight and the diff sits a bit further back that with the OEM ones. I tried with the spacers too but it wouldn't tighten up properly. Very easy to install though obviously and at least the bolt hole is the right size unlike the SPFs...

I'll let you know how if feels once I've got the rear back together, need to slap the suspension and HICAS delete in there.

V28VX37 Veteran

V28VX37

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HICAS Eliminator kit and suspension are in, just needs rear seats and exhaust back in now. Although I might get my brakes tomorrow so will leave it on the stands for a bit longer ;)

V28VX37 Veteran

V28VX37

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I thought you didnt want to wait for replacement rear bushes from super pro?

Good point - I haven't even raised it with the supplier as yet. From previous experience warranty claims take ages so I've gone Nolathane for the bushes for now. Brakes didn't arrive either (sad face) so I'll put it all together tomorrow, at least I will have a car that is drivable... will be nice to get some groceries after two weeks :)

V28VX37 Veteran

V28VX37

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The car is back together since last night and the clunk from the diff is gone. The HICAS delete feels fine too, however it will need a proper alignment soon of course.

I wasn't happy with how the diff sat with or without the supplied 7mm spacers so I ended up putting a standard 2.5mm washer in there that seems to work well. I'll post photos of the whole project at a later date.

Thanks heaps for your input everyone, especially 89CAL and GTSBoy, extremely helpful!!

89CAL Grand Master

89CAL

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Can you do me a favour? Just spray underneath the car with some water (fair bit) and then go for a drive, mine usually clunks when taking off from a standstill

Interested to see if the washers have helped, I didn't bother fitting the suplied spacer because it was no good at all, but might fit a standard washer as you've done if you dont have any issues with clunks etc.

V28VX37 Veteran

V28VX37

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Can you do me a favour? Just spray underneath the car with some water (fair bit) and then go for a drive, mine usually clunks when taking off from a standstill

Interested to see if the washers have helped, I didn't bother fitting the suplied spacer because it was no good at all, but might fit a standard washer as you've done if you dont have any issues with clunks etc.

Yeah man I'll check this once the car is a bit dirtier just washed it after a couple of weeks :)

Did you grease the bushes before putting them in? I wonder if that could cause noise.

Also out of curiosity, when you did yours, did you disconnect drive shafts at all or just drop the diff a bit?

89CAL Grand Master

89CAL

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I used the supplied grease with mine. I think (but it was a while ago) I installed them dry, then noticed the noise and thought I would try with the grease, but didn't really make a difference.

I think I was going to remove the diff completely till I realised I'd have to remove the rear of the exhaust and Couldnt be bothered getting gaskets (even though in hindsight that would have been easy lol) so I probably removed the driveshafts off the diff and hung the diff down.

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V28VX37 Veteran

V28VX37

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Yanack Racing make unreal diff bushes.

I have these for the S15. Quality is high end & they're chromoly. Made in Japan

Thanks, that's interesting, I found some at RHDJapan: http://www.rhdjapan.com/yanack-diff-mount-rigid-collar-set-rear-nissan-s14-s15-r33-r34-c34-c35.html

Based on the pics they're solid metal, a bit like these GKTech items: http://www.gktech.com/index.php/s14-s15-solid-diff-bushes.html

Probably good for track/drift but not sure if I'd want to run solid bushes in a road car, experiences anyone?

V28VX37 Veteran

V28VX37

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Can you do me a favour? Just spray underneath the car with some water (fair bit) and then go for a drive, mine usually clunks when taking off from a standstill

Interested to see if the washers have helped, I didn't bother fitting the suplied spacer because it was no good at all, but might fit a standard washer as you've done if you dont have any issues with clunks etc.

I drove to work in torrential rain this morning, like most of Melbourne it seemed. I can't really point to any difference in noise/clunks/performance between dry and wet.

I'm not overly convinced that the problem you're having is directly related to the diff bushes, however can't think of an alternative cause either... Hope you get it sorted.

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