Rear LSD?

[biggie]

It isn't. I have the window sticker to my car, and they don't specify the VLSD. But the car is equipped with one, regardless.

Was referring to the M37 window stickers.

[mexillis]

asked inifniti directly and this was their response:

"Thank you for taking the time to contact Infiniti and for your interest in our products.

Infiniti does not list the 2011 M37 Sport as having the Viscous Limited Slip Differential (VLSD). We recommend speaking with your local Infiniti Retailer for more precise information."

Why would the dealer have different information?

[Ilya]

^^ lol

[AlphaSnacks]

asked inifniti directly and this was their response:

"Thank you for taking the time to contact Infiniti and for your interest in our products.

Infiniti does not list the 2011 M37 Sport as having the Viscous Limited Slip Differential (VLSD). We recommend speaking with your local Infiniti Retailer for more precise information."

Why would the dealer have different information?

LOL. You expected an actual response from a pencil pusher?

The car has a VLSD. My Infiniti techs have confirmed this. Parts # have confirmed this. Driving and drifting confirms this. There is no one-wheel peel or lopsided drifts. It's always two patches of rubber from start to finish.

[Ilya]

So, bumping this thread as I've been messing with the car lately.

With traction turned off and the car in sport mode, if I SMASH the gas in a high RPM situation (say in 1st or 2nd) at something like a round-a-bout, I can get the back end to slide (never did it on dry/wet pavement, just snow - so it's a little harder to control a slide as it's not as slick) but I watched some M videos of guys taking off from a stop and just leaving a nice burnout and I'm sooo jealous. I know it's the point of AWD, but I wish there was a way to disable it for us car nuts.

[AlphaSnacks]

I left two flawless elevens on the pavement in front of the new lot where my house is being built on. I marked my territory.

I love having RWD. The torque just shreds the tires.

[Ilya]

Hahah nice. I left a nice set of marks at an intersection in Rochester, NY this morning. I was doing a legal U turn at the light and turned off VDC and drifted that crap like a boss around the concrete median or whatever they are called. Your welcome random drivers at intersection; happy Sunday to you! Love this car...I'd never be able to do that with my M35x.

[insanex1]

i'm pretty sure all M37 have rear LSD. I have a non sport M37 and i've done burnouts and see 2 marks. I don't think a car manufacturer can get away with creating a sports sedan with 330HP and only have one wheel putting down the power.

[AlphaSnacks]

You'd be surprised. All BMWs and Merc sedans that aren't Ms or AMGs have open-diffs...that includes the twin-turbo V8s.

[Ilya]

Since we're talking about rear LSD, another piece of the rear I'm curious about...do all M's have RAS (rear active steer)? Or is it a certain package?

[AlphaSnacks]

It's a separate option. Only with the full "S" Sports Package.

[rjoe]

Just because you can leave two burn-out marks, does not mean the car has a limited slip diff.

https://youtu.be/T0DeTzQWNBQ?t=1m12s

Same thing happens in your M35/45/37/56 sport or regular. These cars do not have an LSD.

[biggie]

Just because you can leave two burn-out marks, does not mean the car has a limited slip diff.

https://youtu.be/T0DeTzQWNBQ?t=1m12s

Same thing happens in your M35/45/37/56 sport or regular. These cars do not have an LSD.

Some definitely do. On the M37 with Sport Package it list it on the window sticker.

Was told it wasn't listed on M56 with Sport Package due to its standard on the M56.

[Mjkkb2]

my sticker doesn't list it (2011 m37 Sport, Sport touring and Premium)...

[biggie]

my sticker doesn't list it (2011 m37 Sport, Sport touring and Premium)...

Hmm, I saw one that did when I was looking into this.

[Mjkkb2]

could vary by model year, mine is early ( spring 2010 built date)...

[biggie]

Yeah, possible, didn't remember the year.

Just asked the Infiniti techs as local dealership and they told me it was an option on the M37 but standard on all the M56.

Would love to get to the bottom of this sometime.

[Debonair]

How do you identify an open differential?
With the vehicle on a hoist and the transmission in Neutral, spin the drive wheels by hand. If you can easily spin both wheels in opposite directions, that generally confirms an “open” differential.

How do you determine if a vehicle has a limited-slip differential?
With the vehicle on a hoist and the transmission in Neutral, spin either drive wheel by hand. If the other wheel turns the same direction, the vehicle is equipped with a limited-slip differential. Drive wheels can be rotated in opposite directions, but it is difficult.

How do you determine if a vehicle has VLSD? (Limited-slip viscous type differential)
Transaxle and drive axle model numbers will have a “V” included to identify this option (examples: RE4F03A [V] or R200 [V]).

As far as I can tell our cars use a #383001MG1C differential.

[marosari00]

Been researching this LSD issue for the M56...it appears the M37 uses the R200, the M56 uses the R208. Yet, I am unable to find on the net any information on the R208. Looking at the part number of the M56 from Infiniti Parts USA, 38300-1MG1C is the one listed for the 2012 M56, have not been able to cross reference back to the R208. The RWD M56 uses the 383001MG1C-1501646-331145; the AWD M56 uses the 383001MG1C-1501647-333814. Do note the different numbers.

The article at CarGurus mentions a mechanical LSD for the M56x...https://www.cargurus.com/Cars/2011-Infi ... iew-c22070. There is no further mention of LSD.

Short of getting the car on a lift and testing the wheels spinning in the same direction...anyone done this?

[marosari00]

How do you identify an open differential?
With the vehicle on a hoist and the transmission in Neutral, spin the drive wheels by hand. If you can easily spin both wheels in opposite directions, that generally confirms an “open” differential.

How do you determine if a vehicle has a limited-slip differential?
With the vehicle on a hoist and the transmission in Neutral, spin either drive wheel by hand. If the other wheel turns the same direction, the vehicle is equipped with a limited-slip differential. Drive wheels can be rotated in opposite directions, but it is difficult.

How do you determine if a vehicle has VLSD? (Limited-slip viscous type differential)
Transaxle and drive axle model numbers will have a “V” included to identify this option (examples: RE4F03A [V] or R200 [V]).

As far as I can tell our cars use a #383001MG1C differential.

Answered, at least, from my perspective.
Lifted the car, after chocking the front tires. Placed in neutral, lifted and spun one tire in the rear. The wheels spin in opposite directions. My 2012 M56S has an open differential.

Not too disappointed...Stormie still goes like a "bat out of hell"...

[DFW2011M56S]

How do you identify an open differential?
With the vehicle on a hoist and the transmission in Neutral, spin the drive wheels by hand. If you can easily spin both wheels in opposite directions, that generally confirms an “open” differential.

How do you determine if a vehicle has a limited-slip differential?
With the vehicle on a hoist and the transmission in Neutral, spin either drive wheel by hand. If the other wheel turns the same direction, the vehicle is equipped with a limited-slip differential. Drive wheels can be rotated in opposite directions, but it is difficult.

How do you determine if a vehicle has VLSD? (Limited-slip viscous type differential)
Transaxle and drive axle model numbers will have a “V” included to identify this option (examples: RE4F03A [V] or R200 [V]).

As far as I can tell our cars use a #383001MG1C differential.

Answered, at least, from my perspective.
Lifted the car, after chocking the front tires. Placed in neutral, lifted and spun one tire in the rear. The wheels spin in opposite directions. My 2012 M56S has an open differential.

Not too disappointed...Stormie still goes like a "bat out of hell"...

My 2011 M56S has the Viscous LSD. Both tires turn the same direction.

When I do a burnout both tires spin unlike my Titan with the "active brake limited slip"

[marosari00]

Answered, at least, from my perspective.
Lifted the car, after chocking the front tires. Placed in neutral, lifted and spun one tire in the rear. The wheels spin in opposite directions. My 2012 M56S has an open differential.

Not too disappointed...Stormie still goes like a "bat out of hell"...

My 2011 M56S has the Viscous LSD. Both tires turn the same direction.

When I do a burnout both tires spin unlike my Titan with the "active brake limited slip"

So, I would assume your vehicle was off the ground in neutral and both wheels spun in the same direction? I would ask if the test is valid for a VLSD vs a helical or mechanical LSD? It does make someone wonder why such a difference from one model year to another...

On my next visit to the dealer, for service, I will ask them to check and tell me for certain whether a fully open diff or viscous.

[DFW2011M56S]

My 2011 M56S has the Viscous LSD. Both tires turn the same direction.

When I do a burnout both tires spin unlike my Titan with the "active brake limited slip"

So, I would assume your vehicle was off the ground in neutral and both wheels spun in the same direction? I would ask if the test is valid for a VLSD vs a helical or mechanical LSD? It does make someone wonder why such a difference from one model year to another...

On my next visit to the dealer, for service, I will ask them to check and tell me for certain whether a fully open diff or viscous.

Differential cover was removed and it was a visual verification in my case. Mine was leaking at the seam and I had to reseal it.

[marosari00]

Can't beat that type of verification...awesome!