What kind of differential is in the base/Touring?

analogman · 07-13-2018, 11:16 PM

Hi everyone, this might be a silly question, but what kind of rear differential is in the base and Touring cars?

The Sport and Nismo descriptions list a viscous LSD. Does that mean the base and Touring came with an open diff, or some kind of mechanical LSD?

Thank you!

Spooler · 07-13-2018, 11:46 PM

Open diff.

analogman · 07-14-2018, 12:05 AM

Thank you Spooler!

Chan Chee Hoe · 07-14-2018, 12:16 AM

Quote:

Originally Posted by analogman

Hi everyone, this might be a silly question, but what kind of rear differential is in the base and Touring cars?

The Sport and Nismo descriptions list a viscous LSD. Does that mean the base and Touring came with an open diff, or some kind of mechanical LSD?

Thank you!

Actually i think Nissan's Viscous LSD,behaved like an Open Diff....i noticed it even my Car is new,now 46,000km...worst..not effective at all.

nandosman · 07-14-2018, 12:32 AM

Quote:

Originally Posted by Chan Chee Hoe

Actually i think Nissan's Viscous LSD,behaved like an Open Diff....i noticed it even my Car is new,now 46,000km...worst..not effective at all.

I have never driven another sports car before, how do you notice the difference?

Chan Chee Hoe · 07-14-2018, 05:23 PM

Quote:

Originally Posted by nandosman

I have never driven another sports car before, how do you notice the difference?

Try half power start from a Junction with Steering in a Angle,you can wheelspin on the inside wheel.

Rusty · 07-14-2018, 07:36 PM

Quote:

Originally Posted by nandosman

I have never driven another sports car before, how do you notice the difference?

Do a hole shot. You will have only one wheel spinning. What we call a "one wheel peeler". You will leave only one black mark most of the time.

nandosman · 07-14-2018, 08:41 PM

Quote:

Originally Posted by Rusty

Do a hole shot. You will have only one wheel spinning. What we call a "one wheel peeler". You will leave only one black mark most of the time.

And this is when the VLSD is good, or expired?

Rusty · 07-14-2018, 09:10 PM

Quote:

Originally Posted by nandosman

And this is when the VLSD is good, or expired?

For the open diff. When the VLSD gets hot and overheated. It will do the same thing.

ChopsZ · 07-30-2018, 01:19 PM

Quote:

Originally Posted by Rusty

Do a hole shot. You will have only one wheel spinning. What we call a "one wheel peeler". You will leave only one black mark most of the time.

Not necessarily. I have a base with open dif, and have no troubles at all laying down perfect "elevens" in 1st and 2nd gear in a straight line.

Rusty · 07-30-2018, 02:30 PM

Quote:

Originally Posted by ChopsZ

Not necessarily. I have a base with open dif, and have no troubles at all laying down perfect "elevens" in 1st and 2nd gear in a straight line.

In my experience. Sometimes you get both. Most times only one.

JARblue · 07-14-2018, 07:10 AM

Open diff applies the same torque (50% to each rear wheel) regardless of traction. Not good on a track when you're powering through a turn on the edge of traction

VLSD can transfer torque to either wheel as needed. This effectively allows the car to put down more power to the wheel with more grip, maximizing traction, typically during a turn. Of course the VLSD isn't a proper track solution - the fluid overheats way too easily and it just turns into an open diff until it cools down.

A 1.5 or 2 way diff allows a lot more torque transfer and is ideal for track driving.

Desert Rat · 07-16-2018, 03:05 PM

Quote:

Originally Posted by JARblue

Open diff keeps rear axles spinning at the same rotation (speed). Not good on a track when you're powering through a turn.

VLSD transfers some power from the inside wheel to the outside wheel in a turn. This effectively allows the wheels to rotate at different speeds to maximize traction and prevent slipping during a turn. Of course the VLSD isn't a proper track solution - the fluid overheats way too easily and it just turns into an open diff until it cools down.

A 1.5 or 2 way diff allows a lot more power transfer and is ideal for track driving.

Um, that's not how they work at all.

An open diff puts all power to the wheel with the least amount of traction if traction breaks loose. If one wheel breaks traction, no power goes to the other wheel.

An LSD enables some of the power to be split in that same situation, provided the needed breakaway torque to get power to the other wheel doesn't exceed the breakaway torque in the LSD. Clutch discs are used in the diff to provide that additional friction. Those clutch discs wear out over time and an LSD becomes more and more like an open diff. Nissan has always used minimal breakaway torque in their LSD units, greatly limiting their effectiveness. Same holds true for the old LSDs they used in D21 and D22 trucks. With those you could slide in 1-2 additional discs to "tighten up" the LSD, and with enough additions, you can basically turn an LSD into a spool where both wheels always get the same power. That's not desirable either because in a turn, that means the inside tire HAS to break traction to prevent binding.

JARblue · 07-16-2018, 06:56 PM

Quote:

Originally Posted by Desert Rat

Um, that's not how they work at all.

I had been sitting a bar for quite a while when I typed that

I have edited the post to clarify

Justint5387 · 07-16-2018, 08:06 PM

Quote:

Originally Posted by JARblue

I had been sitting a bar for quite a while when I typed that

I have edited the post to clarify

Still wrong. Open diff sends power to the wheel with the least traction. It will send 100% of the power to the lighter wheel in a corner.

07-13-2018, 11:16 PM	#1 (permalink)
analogman Base Member Join Date: Sep 2017 Location: New England Posts: 38 Drives: Actively shopping Rep Power: 8	What kind of differential is in the base/Touring? Hi everyone, this might be a silly question, but what kind of rear differential is in the base and Touring cars? The Sport and Nismo descriptions list a viscous LSD. Does that mean the base and Touring came with an open diff, or some kind of mechanical LSD? Thank you!

07-14-2018, 07:10 AM	#12 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 44 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684441	Open diff applies the same torque (50% to each rear wheel) regardless of traction. Not good on a track when you're powering through a turn on the edge of traction VLSD can transfer torque to either wheel as needed. This effectively allows the car to put down more power to the wheel with more grip, maximizing traction, typically during a turn. Of course the VLSD isn't a proper track solution - the fluid overheats way too easily and it just turns into an open diff until it cools down. A 1.5 or 2 way diff allows a lot more torque transfer and is ideal for track driving. Montez, cooltoy, Hotrodz and 4 others like this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \| Last edited by JARblue; 07-16-2018 at 06:54 PM. Reason: edit for clarification

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
2009 Base differential 3.335 swap to 2015 Nismo LSD 3.69 Differential	kinitox	Engine & Drivetrain	6	03-30-2019 02:46 PM
[WTB] Manual base differential	Justint5387	Parts for sale (Private Classifieds)	0	10-24-2017 08:33 PM
[FOR SALE] Base Stock Differential and Springs	AdamRacer	Parts for sale (Private Classifieds)	15	06-29-2015 07:01 PM
Base differential to LSD conversion	Dragon_Ball_Z	Engine & Drivetrain	2	02-17-2015 10:49 PM
FOR BASE 18' OEM USERS, what kind of tires you have??	dudesky	Wheels & Tires	9	08-18-2013 04:48 PM

07-13-2018, 11:46 PM	#2 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,068 Drives: 2013 Nismo 370z Rep Power: 2684394	Open diff.

07-14-2018, 12:05 AM	#3 (permalink)
analogman Base Member Join Date: Sep 2017 Location: New England Posts: 38 Drives: Actively shopping Rep Power: 8	Thank you Spooler!