How to tell a stock open diff from a lsd - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

akiraintegra06 · 01-28-2003, 11:56 PM

Im new to the 240 game and was just wondering how you tell if the car(1990 240sx) has a lsd or not just by looking at the diff? Are there markings on the housing that show its an lsd?
I found a parts car, but they guy doesnt know too much about the car(lien sale). I have already taken the motor/trans,inside wire harness, motor wire harness, ecu, ac/vent controls, dash, power win/locks/mirrors, fenders and the whole front end.
An lsd would top it off for the amazing price I paid for all this junk.
any help would be apprieciated. by the way if the price is right I will sell these parts except for the motor and trans.
thanks
Scott

**mrmephistopheles** · 01-29-2003, 12:25 AM

LSD housing has large cooling fins on the bottom.

*Jeff240sx* · 01-29-2003, 12:30 AM

There should also be an orange sticker on the housing telling you to fill with silicon differential fluid only.
You could also jack up the car and turn the rear wheel. If there is resistance on it after a couple turns, if not immediatly, it's limited slip.
-Jeff

drift_newbie · 01-29-2003, 06:03 AM

On my s13, the stock open diff would turn the tires in opposite directions if you had it in gear with no load on the back end, but the r200v, (lsd,) turns both in the same direction.

-ben

AKADriver · 01-29-2003, 07:52 AM

the 'jack it up and turn the wheel' trick could also work for a broken open diff... so I suggest not doing that.

Look for the orange sticker. By the way the sticker just says "VISCOUS LSD", nothing about the fluid. A VLSD does not require special fluid. "LSD oil" with friction modifiers is for clutch-type LSDs ONLY.

Edit: I just noticed you have a 1990. Simple way to tell if you have an LSD: YOU DON'T!

They didn't sell 240SXs with VLSDs in 1990, case closed.

01-28-2003, 11:56 PM	#1
akiraintegra06 Leaky Injector Join Date: Jan 2003 Location: Orange County Age: 47 Posts: 105 Trader Rating: (0) Feedback Score: 0 reviews	How to tell a stock open diff from a lsd Im new to the 240 game and was just wondering how you tell if the car(1990 240sx) has a lsd or not just by looking at the diff? Are there markings on the housing that show its an lsd? I found a parts car, but they guy doesnt know too much about the car(lien sale). I have already taken the motor/trans,inside wire harness, motor wire harness, ecu, ac/vent controls, dash, power win/locks/mirrors, fenders and the whole front end. An lsd would top it off for the amazing price I paid for all this junk. any help would be apprieciated. by the way if the price is right I will sell these parts except for the motor and trans. thanks Scott

01-29-2003, 12:30 AM	#3
Jeff240sx I hate you too... Join Date: Jul 2001 Location: Tampa, FL Age: 42 Posts: 5,828 Trader Rating: (0) Rides Gallery: Jeff240sx Feedback Score: 0 reviews	There should also be an orange sticker on the housing telling you to fill with silicon differential fluid only. You could also jack up the car and turn the rear wheel. If there is resistance on it after a couple turns, if not immediatly, it's limited slip. -Jeff __________________ Whatup?

01-29-2003, 06:03 AM	#4
drift_newbie Leaky Injector Join Date: Jan 2003 Location: Midwest Posts: 120 Trader Rating: (0) Feedback Score: 0 reviews	also On my s13, the stock open diff would turn the tires in opposite directions if you had it in gear with no load on the back end, but the r200v, (lsd,) turns both in the same direction. -ben __________________ Putting a smart-ass comment here is just setting yourself up to get slammed

01-29-2003, 07:52 AM	#5
AKADriver Post Whore! Join Date: May 2002 Location: Springfield, VA Age: 43 Posts: 3,517 Trader Rating: (1) Feedback Score: 1 reviews	the 'jack it up and turn the wheel' trick could also work for a broken open diff... so I suggest not doing that. Look for the orange sticker. By the way the sticker just says "VISCOUS LSD", nothing about the fluid. A VLSD does not require special fluid. "LSD oil" with friction modifiers is for clutch-type LSDs ONLY. Edit: I just noticed you have a 1990. Simple way to tell if you have an LSD: YOU DON'T! They didn't sell 240SXs with VLSDs in 1990, case closed. Last edited by AKADriver; 01-29-2003 at 08:02 AM..

01-29-2003, 12:25 AM	#2
mrmephistopheles Magnanimous Justice Distribution Service Join Date: Mar 2002 Location: BFE Age: 23 Posts: 14,372 Trader Rating: (9) Rides Gallery: mrmephistopheles Feedback Score: 9 reviews	LSD housing has large cooling fins on the bottom.