Need help figuring out what's wrong.

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Feb 13, 2018 | 07:34 AM

Snow Blind

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From: Wisconsin

Need help figuring out what's wrong.

So recently baught a 2006 350z grand touring with a lsd diff. I replaced the clutch with a stage 2 and the flywheel with a single disk. I had to make a new slave cylinder arm for the clutch because the oem one was to small. Now I ran into a weird problem. I'll turn off VDC and when I'm in a low gear and get the tires spinning the rear end will kind of shake or made a repeating loud slamming noise and this never happens unless the tires spin. I replaced the diff fluids but it still happens. The only other solution I can think of is on the slave cylinder arm that I made I think I made it a little to long and there no play so could it be something with the clutch? If it's not that the my next step is to get new diff gears which is like $1000! Any ideas?

Feb 13, 2018 | 08:24 AM

Atreyu'z 350

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From: Pennsylvania

Does it do it with VDC on? Does the ECM cut fuel when the slamming starts?.. And explain to me(us) this clutch arm you made. BTW, pics and videos go a long way with posts like this.

Feb 13, 2018 | 08:42 AM

travlee

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i have a grand idea... dont freakin double post.

https://my350z.com/forum/maintenance...-new-diff.html

Feb 13, 2018 | 09:05 AM

Atreyu'z 350

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From: Pennsylvania

Quote:

Originally Posted by travlee

i have a grand idea... dont freakin double post.

https://my350z.com/forum/maintenance...-new-diff.html

Oh wow. I didn't even see that other one

Feb 13, 2018 | 09:53 AM

Snow Blind

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From: Wisconsin

Sorry I posted it in the wrong place and I couldn't figure out how to delete the older one

Feb 13, 2018 | 09:57 AM

Snow Blind

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From: Wisconsin

Quote:

Originally Posted by Atreyu'z 350

Does it do it with VDC on? Does the ECM cut fuel when the slamming starts?.. And explain to me(us) this clutch arm you made. BTW, pics and videos go a long way with posts like this.

Yeah it happens with VDC on but it's prob just trying to stop the rear from spinning in the first place. Idk about the ECM I'm still kind of a beginner at this stuff it's my first "project" car. I used a normal bolt and I cut the top and thread off and rounded the ends so it look pretty identical to the oem one just like a half inch longer. I can't get pics because I'm in school right now.

Feb 13, 2018 | 03:17 PM

Painterguy39

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From: minnesota

Quote:

Originally Posted by Snow Blind

Ok now we have a clue as to what intellect we are dealing with....so you decided to save $30 by making your own clutch arm pivot....and you want us to help?......here's a shot...buy the right parts!Now you get to drop the trans again....boy you saved a bunch!

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Feb 13, 2018 | 03:21 PM

Atreyu'z 350

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From: Pennsylvania

Right. I'm just trying to isolate things.. Did it do this before you replaced the clutch(or didn't you try to burn out until after you replaced the clutch..heh)? Does it move in and out of the gears smoothly? Like is it driveable? And it just does it when you burn out?... Idk, it almost sounds like one of your suspension and/or drive train components is loose or worn out in the back.

Feb 13, 2018 | 03:25 PM

Snow Blind

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From: Wisconsin

Quote:

Originally Posted by Painterguy39

You don't need to drop the trans to get to the slave cylinder arm... and i tried looking and I can't find where you buy a longer arm so bought an aftermarket slave cylinder which came with a slightly longer arm that wasn't specified but it still wasn't enough length so I just made one that looks identical to the oem.

Feb 13, 2018 | 03:29 PM

#10

Snow Blind

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From: Wisconsin

Quote:

Originally Posted by Atreyu'z 350

The old clutch was the only one that was ever in it with like 98k on it and it was slipping so that why I replaced it thus I never was able to get the rear to spin. Yeah it shifts fine and everything drives like a dream no shaking or anything it is only when the rear spins the shaking happens.

Feb 13, 2018 | 03:34 PM

#11

Snow Blind

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From: Wisconsin

Quote:

Originally Posted by Painterguy39

It might be that im screwing up my part names im talking about the rod thing that the slave cylinder pushes out I made my own rod

Feb 13, 2018 | 03:42 PM

#12

travlee

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I need to see a pic of this contraption you made, along with rear diff bushings

Feb 13, 2018 | 03:58 PM

#13

Snow Blind

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From: Wisconsin

Quote:

Originally Posted by travlee

I need to see a pic of this contraption you made, along with rear diff bushings

You can’t see it that well because I’m having troubles getting the rubber off but that silver rod is what I made because the single disk I put in made me need more length the engage the clutch

Feb 13, 2018 | 04:11 PM

#14

travlee

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From: Texas

Hard to tell on my phone, but diff bushing looks dry rotted but no goo...

Take off the slave and see if the fork has alot of slop in it, wondering if you need a new pivot ball and fork, hell i would also replace the slave because cheap and easy

Feb 13, 2018 | 04:14 PM

#15

Snow Blind

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From: Wisconsin

Quote:

Originally Posted by travlee

Alright I will this weekend if I get to it im also repainting somethings thanks for the help/suggestions you been giving me

Feb 14, 2018 | 06:17 AM

#16

RedBullRR

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From: New York

Sounds like Wheel Hop to me, normal in these cars with Soft or shot bushings on the rear. Best way I stopped wheel hop is to learn how to launch my car properly.