Vibration after installing diff bushings

JTM88 · 11-20-2017, 01:09 PM

So yesterday I installed new front and rear diff bushings from Z1 at the same time I installed a pumpkin with a VLSD. Now I’m getting a strong vibration from the back of the car at any speed over 40mph. I’ve checked everything and it’s tight and correct, any ideas what could be causing this?

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crazy4oldcars · 11-20-2017, 02:54 PM

Driveshaft?
Wheel balance?
Missing ring gear bolt?
Oh, so many options...
I hope you can find it soon.

Kirk B.

1st · 11-20-2017, 04:44 PM

Could just be the busings itself since they are stiffer. Give it some miles before it could settle in a bit. My 2 cents...

JTM88 · 11-20-2017, 05:14 PM

Quote:

Originally Posted by crazy4oldcars

Driveshaft?
Wheel balance?
Missing ring gear bolt?
Oh, so many options...
I hope you can find it soon.

Kirk B.

Quote:

Originally Posted by 1st

Could just be the busings itself since they are stiffer. Give it some miles before it could settle in a bit. My 2 cents...

It was definitely more than than increased NVH, it sounded like the car was about to fall apart.

I found the problem, the new differential I put in had a bent input shaft. I switched it out with the original diff and all is good.

My new plan is to put 4.08s in the diff and switch it out in a few months.

1st · 11-20-2017, 05:28 PM

I'm glad you figured it out, should be a relief.

JTM88 · 11-20-2017, 05:50 PM

Quote:

Originally Posted by 1st

I'm glad you figured it out, should be a relief.

Yeah, I was freaking out trying to figure out what could be wrong. I'm kinda pissed, but at least I can drive my car.

crazy4oldcars · 11-20-2017, 08:42 PM

Good deal. Glad you found it.

Kirk B.

11-20-2017, 01:09 PM	#1 (permalink)
JTM88 Enthusiast Member Join Date: Oct 2016 Location: Houston, TX Posts: 276 Drives: 2012 370Z Rep Power: 14	Vibration after installing diff bushings So yesterday I installed new front and rear diff bushings from Z1 at the same time I installed a pumpkin with a VLSD. Now I’m getting a strong vibration from the back of the car at any speed over 40mph. I’ve checked everything and it’s tight and correct, any ideas what could be causing this? Sent from my iPhone using Tapatalk __________________ 2012 Base Gun Metallic MT6 -CNT Racing CBE-Swift Sport Springs-Sport Akebono BBK-Z1 Motorsports Intakes-König Oversteer Wheels-1320 Resonated Test Pipes -RJM Rev 2.1 Clutch Pedal-

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11-20-2017, 02:54 PM	#2 (permalink)
crazy4oldcars Enthusiast Member Join Date: Aug 2016 Location: SE Texas Posts: 448 Drives: '16 Nismo Tech Rep Power: 28413	Driveshaft? Wheel balance? Missing ring gear bolt? Oh, so many options... I hope you can find it soon. Kirk B.

11-20-2017, 04:44 PM	#3 (permalink)
1st A True Z Fanatic Join Date: Jul 2012 Location: I 80 Biz U.S. 50 Posts: 1,710 Drives: Platinum Z Rep Power: 1616	Could just be the busings itself since they are stiffer. Give it some miles before it could settle in a bit. My 2 cents...

11-20-2017, 05:28 PM	#5 (permalink)
1st A True Z Fanatic Join Date: Jul 2012 Location: I 80 Biz U.S. 50 Posts: 1,710 Drives: Platinum Z Rep Power: 1616	I'm glad you figured it out, should be a relief.

11-20-2017, 08:42 PM	#7 (permalink)
crazy4oldcars Enthusiast Member Join Date: Aug 2016 Location: SE Texas Posts: 448 Drives: '16 Nismo Tech Rep Power: 28413	Good deal. Glad you found it. Kirk B.