horrific noise coming from back of '89 240 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Grimbrother · 07-09-2014, 04:59 PM

https://www.youtube.com/watch?v=MbgWjHRp_6Q

Really only happens after pushing the car on fun streets...

My 240 has a welded diff currently. Could this noise be that? Or could it be a wheel bearing? or something just rubbing something else?

Any help is greatly appreciated,

Grimbrother.

*anti tyler* · 07-09-2014, 10:21 PM

I'm assuming it's not the higher pitched 'dun dun dun dun' noise but the kind of clinking/clunking noise? sounds to me like you may need to replace those subframe bushings. Almost like the subframe is sloshing back and forth as you let off and on the throttle causing it to move back and forth making a metal on metal contact to the actual body. Could be wrong, in all actuality it could be a multiple of things...

Grimbrother · 07-10-2014, 10:44 AM

the wheels no longer rotate together when my friend and i lifted it. each wheel spun independently of the other...

Grimbrother · 07-10-2014, 10:45 AM

so i think i broke the welds off the diff.

So Make Like · 07-12-2014, 06:10 AM

looool, my friends diff broke the welds loose a while back and his diff seized. wheel bearing will be more of a deep 'whirring' noise from my experiences.

Grimbrother · 07-12-2014, 08:34 AM

What makes a diff seize up? It's now leaking diff fluid and covering my back bumper and hatch in oil. Is it now unsafe to drive?

SHIFTrl240 · 07-12-2014, 08:40 AM

So your welded diff is not welded anymore, and you have diff fluid spraying everywhere.
Where is the fluid coming from?

But, yes I would assume it is unsafe to drive.

I think you're pretty lucky it didn't just blow up in the street on you.

Grimbrother · 07-12-2014, 08:57 AM

It's dripping out of the differential housing.

RickyS13. · 07-14-2014, 03:54 PM

Just for the record not all welded diffs experience this as I ran mine for 2 years with absolutely no problems.

xoxide · 07-14-2014, 04:06 PM

Don't worry about it, just keep driving... No big deal.

Grimbrother · 07-15-2014, 01:33 PM

Quote:

Originally Posted by xoxide

Don't worry about it, just keep driving... No big deal.

well little update the differential housing has a crack so i at least know where the leak is coming from.

opened up the plugs to drain the liquid and there was barely any in it. also stuck my finger into it and dragged out all these metal bits...

xoxide · 07-16-2014, 09:59 AM

Yep, its common... Just refill the diff and proceed as usual.

***dorkidori_s13*** · 07-16-2014, 10:25 AM

whatever happened to actually doing shit right and using an LSD?

Grimbrother · 07-16-2014, 12:07 PM

Quote:

Originally Posted by dorkidori_s13

whatever happened to actually doing shit right and using an LSD?

i wish the guy had just put on in it instead of doing a shit job welding it. the differential basically screams at me while i drive. going to replace it soon enough.

***dorkidori_s13*** · 07-16-2014, 12:13 PM

Quote:

Originally Posted by Grimbrother

i wish the guy had just put on in it instead of doing a shit job welding it. the differential basically screams at me while i drive. going to replace it soon enough.

statement was more of a general tone than directed squarely at you.

but, good bit of advice... get an LSD, especially if daily driving.

Grimbrother · 07-16-2014, 12:22 PM

Quote:

Originally Posted by dorkidori_s13

statement was more of a general tone than directed squarely at you.

but, good bit of advice... get an LSD, especially if daily driving.

since i've got you here is this LSD any good?
http://www.amazon.com/OBX-Limited-Di.../dp/B00269MIXU

pacotaco345 · 07-16-2014, 12:25 PM

Quote:

Originally Posted by dorkidori_s13

statement was more of a general tone than directed squarely at you.

but, good bit of advice... get an LSD, especially if daily driving.

I've daily'd my car with a welded for 4+ years now. No abnormal tire wear, no broken axles, haven't killed myself in the rain, haven't even checked the fluid since I welded it back then. The diff just needs to be prepped properly before it's welded and the car needs to have a halfway decent alignment.

***dorkidori_s13*** · 07-16-2014, 01:58 PM

Quote:

Originally Posted by Grimbrother

since i've got you here is this LSD any good?
http://www.amazon.com/OBX-Limited-Di.../dp/B00269MIXU

from all the reading i did on the obx units, theyre pretty decent outside of the internal washers (cant remember what theyre called). basically what you want to do if you purchase an OBX unit is have the internal washers immediately replaced with quality units. any transmission shop can do this for you.

what i would recommend you do is save your money and buy a Quaife unit or OEM S15 Helical unit (the s15 unit REQUIRES s15/R34 29 spline output shafts, 28 spline output shafts will NOT work) if youre in the market for a helical diff.

i personally run a helical S15 LSD in my S13... it slides just fine. it doesnt lock up like a clutch type does, but ive yet to have a single issue where full lock is required (helical/torsen dont lock, they just transfer torque as they are a gear base instead of a clutch base). im building my car for reliability and ease of driving, so the HLSD works just fine for me as its 100% silent, maintenance free (outside of changing the gear oil every 20-30k miles) and NEVER wears out!

if you want full lock and something that isnt a pain in the ass driving around town, go buy a 1.5 way or 2 way clutch type LSD from Cusco or Kaaz.

07-09-2014, 04:59 PM	#1
Grimbrother Join Date: Jul 2014 Location: Upstate Ny Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	horrific noise coming from back of '89 240 https://www.youtube.com/watch?v=MbgWjHRp_6Q Really only happens after pushing the car on fun streets... My 240 has a welded diff currently. Could this noise be that? Or could it be a wheel bearing? or something just rubbing something else? Any help is greatly appreciated, Grimbrother.

07-12-2014, 08:40 AM	#7
SHIFTrl240 Leaky Injector Join Date: Dec 2003 Location: Cincinnati Age: 39 Posts: 138 Trader Rating: (1) Feedback Score: 1 reviews	So your welded diff is not welded anymore, and you have diff fluid spraying everywhere. Where is the fluid coming from? But, yes I would assume it is unsafe to drive. I think you're pretty lucky it didn't just blow up in the street on you. __________________

07-14-2014, 03:54 PM	#9
RickyS13. Leaky Injector Join Date: Sep 2010 Location: Phoenix Posts: 100 Trader Rating: (2) Feedback Score: 2 reviews	Just for the record not all welded diffs experience this as I ran mine for 2 years with absolutely no problems. __________________

07-16-2014, 10:25 AM	#13
*dorkidori_s13* ITS LISA'S FAULT!!! Join Date: Jun 2003 Location: Las Vegas Age: 43 Posts: 7,496 Trader Rating: (41) Feedback Score: 41 reviews	whatever happened to actually doing shit right and using an LSD? __________________ Check out my IG for what I'm up to! DORKIDORI INSTAGRAM!!!

07-10-2014, 10:44 AM	#3
Grimbrother Join Date: Jul 2014 Location: Upstate Ny Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	the wheels no longer rotate together when my friend and i lifted it. each wheel spun independently of the other...

07-10-2014, 10:45 AM	#4
Grimbrother Join Date: Jul 2014 Location: Upstate Ny Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	so i think i broke the welds off the diff.

07-12-2014, 06:10 AM	#5
So Make Like Leaky Injector Join Date: Apr 2013 Location: hawai'i nei Posts: 146 Trader Rating: (0) Feedback Score: 0 reviews	looool, my friends diff broke the welds loose a while back and his diff seized. wheel bearing will be more of a deep 'whirring' noise from my experiences.

07-12-2014, 08:34 AM	#6
Grimbrother Join Date: Jul 2014 Location: Upstate Ny Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	What makes a diff seize up? It's now leaking diff fluid and covering my back bumper and hatch in oil. Is it now unsafe to drive?

07-12-2014, 08:57 AM	#8
Grimbrother Join Date: Jul 2014 Location: Upstate Ny Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	It's dripping out of the differential housing.

07-14-2014, 04:06 PM	#10
xoxide Post Whore! Join Date: May 2010 Location: Jacksonville Posts: 2,807 Trader Rating: (21) Feedback Score: 21 reviews	Don't worry about it, just keep driving... No big deal.

07-16-2014, 09:59 AM	#12
xoxide Post Whore! Join Date: May 2010 Location: Jacksonville Posts: 2,807 Trader Rating: (21) Feedback Score: 21 reviews	Yep, its common... Just refill the diff and proceed as usual.