Brainstorming on the clunk from by diff - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Zbythegods · 01-21-2014, 07:26 PM

Hey fellow Zilvians again,

I have a 95 s14 witha redtop sr20. I have what I believe to either be an open diff or possible a 1.5way. Not entirely sure, I bought the car with it. If anyone could tell me what to look for I could find out and post it. Months ago I noticed when I go a little hard around turns it would pop and clunk which from my understanding is normal for a LSD or equivilent. Now I'm noticing a slight knock from the diff between 70-80 mph as well as pretty serious popping when I turn from a complete stop. So basically unless I clutch super slow and not give it gas turning, it will pop a lot. Does anyone think I just may need to change the gear oil or is this diff a possible goner? Any help would be awesome guys. I can post pics if needed.

240boi115 · 01-21-2014, 09:48 PM

best thing to do is to pop her open and see whats going on down there. if its serious be happy you caught it in time.. a diff that basically locks up/jams is scary as hell going even 40 mph

Fuego · 01-21-2014, 09:55 PM

Quote:

Originally Posted by 240boi115

best thing to do is to pop her open and see whats going on down there. if its serious be happy you caught it in time.. a diff that basically locks up/jams is scary as hell going even 40 mph

+1 on this.

Some diffs like to clunk at low speed, tight turns but knocking at highway speed aint right. Check out what's going on in there.

*fliprayzin240sx* · 01-22-2014, 02:24 AM

Did you check your subframe bushings? Clunk could be that. If its good, and its the diff, lash could be off.

Zbythegods · 01-22-2014, 05:52 PM

Hmmmm. Listen guys I really do appreciate that. I'm going to check the subrame bushings first. I hope to the gods it is that but knowing my luck it might not be. What I noticed is it does get worse if I hit a bump on the highway...might be the bushings after all. I just hope I can hold the fort down until this weekend lol.

Zbythegods · 01-22-2014, 05:53 PM

It is kind of sketchy though. I was getting off the exit ramp today taking a right bank at around 70 and the wheel locked up for a split second. Scary shit lol.

di-devol · 01-22-2014, 05:54 PM

Kinda doubt that it could be the subframe bushings if it's clunking at speed.

Mikester · 01-23-2014, 01:32 PM

Well, the one thing that I haven't seen is anything you happened to notice when you GOT UNDER THERE AND LOOKED AT EVERYTHING BEFORE STARTING A THREAd! But seriously, if you have the sound isolated down to the diff area; the problem could very well be obvious... Just sayin'

Check the nuts/bolts holding your axles to the diff... and the DS nuts/bolts... as well as the other mounting points & the bushings. Could just be some slop due to loose/missing hardware... Also verify the axle nuts are securely fastened thru the rear hubs...

Might be a little easier to help if you can tell us for sure what the problem is NOT... Yano?

Zbythegods · 01-23-2014, 05:50 PM

Quote:

Originally Posted by Mikester

Well, the one thing that I haven't seen is anything you happened to notice when you GOT UNDER THERE AND LOOKED AT EVERYTHING BEFORE STARTING A THREAd! But seriously, if you have the sound isolated down to the diff area; the problem could very well be obvious... Just sayin'

Check the nuts/bolts holding your axles to the diff... and the DS nuts/bolts... as well as the other mounting points & the bushings. Could just be some slop due to loose/missing hardware... Also verify the axle nuts are securely fastened thru the rear hubs...

Might be a little easier to help if you can tell us for sure what the problem is NOT... Yano?

Yeah you are right Mike, I apologize for not inspecting it first. It started happening on Monday during my work week and I work 7am-midnight during the week. I was hoping to get a few suggestions so I can take it on this weekend and make sure I still have a car to take to work on Monday lol. I definitely appreciate you guys being helpful for sure. I will update the post with what the issue is this weekend if I find out what it is. I'm going to check all the factors you mentioned. Thanks again.

01-21-2014, 07:26 PM	#1
Zbythegods Zilvia Member Join Date: May 2013 Location: Tampa Age: 33 Posts: 238 Trader Rating: (4) Feedback Score: 4 reviews	Brainstorming on the clunk from by diff Hey fellow Zilvians again, I have a 95 s14 witha redtop sr20. I have what I believe to either be an open diff or possible a 1.5way. Not entirely sure, I bought the car with it. If anyone could tell me what to look for I could find out and post it. Months ago I noticed when I go a little hard around turns it would pop and clunk which from my understanding is normal for a LSD or equivilent. Now I'm noticing a slight knock from the diff between 70-80 mph as well as pretty serious popping when I turn from a complete stop. So basically unless I clutch super slow and not give it gas turning, it will pop a lot. Does anyone think I just may need to change the gear oil or is this diff a possible goner? Any help would be awesome guys. I can post pics if needed. Last edited by Zbythegods; 01-22-2014 at 05:55 PM..

01-22-2014, 02:24 AM	#4
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Did you check your subframe bushings? Clunk could be that. If its good, and its the diff, lash could be off. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

01-22-2014, 05:54 PM	#7
di-devol Zilvia FREAK! Join Date: Jun 2010 Location: Woodinville Age: 42 Posts: 1,412 Trader Rating: (5) Feedback Score: 5 reviews	Kinda doubt that it could be the subframe bushings if it's clunking at speed. __________________

01-23-2014, 01:32 PM	#8
Mikester Nissanaholic! Join Date: Jun 2007 Location: Kathleen, GA Age: 53 Posts: 1,956 Trader Rating: (0) Feedback Score: 0 reviews	Well, the one thing that I haven't seen is anything you happened to notice when you GOT UNDER THERE AND LOOKED AT EVERYTHING BEFORE STARTING A THREAd! But seriously, if you have the sound isolated down to the diff area; the problem could very well be obvious... Just sayin' Check the nuts/bolts holding your axles to the diff... and the DS nuts/bolts... as well as the other mounting points & the bushings. Could just be some slop due to loose/missing hardware... Also verify the axle nuts are securely fastened thru the rear hubs... Might be a little easier to help if you can tell us for sure what the problem is NOT... Yano? __________________

01-22-2014, 05:52 PM	#5
Zbythegods Zilvia Member Join Date: May 2013 Location: Tampa Age: 33 Posts: 238 Trader Rating: (4) Feedback Score: 4 reviews	Hmmmm. Listen guys I really do appreciate that. I'm going to check the subrame bushings first. I hope to the gods it is that but knowing my luck it might not be. What I noticed is it does get worse if I hit a bump on the highway...might be the bushings after all. I just hope I can hold the fort down until this weekend lol.

01-22-2014, 05:53 PM	#6
Zbythegods Zilvia Member Join Date: May 2013 Location: Tampa Age: 33 Posts: 238 Trader Rating: (4) Feedback Score: 4 reviews	It is kind of sketchy though. I was getting off the exit ramp today taking a right bank at around 70 and the wheel locked up for a split second. Scary shit lol.