No limited slip in V6 A6. Reasoning? - Page 4 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

M109Rrider · 01-27-2011, 04:18 PM

Quote:

Originally Posted by Devon

This about sums up my situation.

Sorry, I did not clarify that I meant the V6 with the automatic transmission.

Unfortunately I cannot get the manual transmission as my wife will be driving the car and she can't/won't drive a stick.

I'm not interested in doing burnouts, I am interested in all-around good traction in all types of weather.

Thanks for the reply's guys and gals.

And thank you to DAL123 for clarifying how one can go about adding a LSD in the future.

If that's the case then you have no worries. Traction/stability control will do what you need better than a posi will.

Devon · 01-27-2011, 05:27 PM

Quote:

Originally Posted by mclark10

Just get a V8 M6 and tell your wife to drive the minivan

Funny guy. This is going to be, primarily, my wife's car. I'm going to be modding my '72 Parisienne.

DAL123 · 01-27-2011, 05:55 PM

Your welcom Devon

600hp-lpe · 01-27-2011, 05:56 PM

Quote:

Originally Posted by Devon

Forgive my ignorance as I'm sure this has been discussed before, but what is the reasoning behind GM not offering a limited slip diff in the automatic? I just don't see how this makes sense.

Well... it makes for longer single wheel burnouts...

Shu71 · 01-28-2011, 02:26 PM

A couple of things, a limited slip/posi unit is very different than an open diferential. Even an open dif uses spider gears which when you place enough load on them will cause the drivers rear tire to transfer power to the ground. However, if you accelerate moderately it will not force the axle to rotate at the same speed or torque as the passenger axle. You can in fact help an open dif by adding traction bars. IN this case the IRS setup would aid in making even an open dif spin both wheels. Once the drivers rear breaks loose it will remain locked until you let off the throttle or the car accelerates enough to reduce the load and then it will release. I had a 69 Camaro, 71 Chevelle, and a LeMans that all had open difs but out of the hole always 'caught posi'. I also had several old cars and new trucks with a true posi dif. They have clutches in them which lock both wheels. GM calls them limited slip. They take special limited slip lubricant additive to keep those clutches working correctly. GM also makes a "locker" rear dif and that is antoher beast altogether. Those are typically only put in trucks due to how they lock and unlock they are more built for low speed locking that releases at about 20 to 30 mph. But now I am getting off topic.

A limited slip will lock both axle more easily and keep them locked. It takes more (power and chassis setup) to get an open dif to lock. If you jack up a car and spin the passenger wheel by hand, the drivers wheel will spin in the same direction on a limited slip and the opposite direction on an open dif.

In the snow, an open rear dif will help keep the car straight if the rear tire loses traction. It hurts if you get stuck though because it will not lock the drivers axle to get you out. Traction control reduces power transmitted to the ground of a slipping wheel. It will help in snowy conditions but will reduce the power to the ground and slow down acceleration which isn't good for racing type applications unless the driver has less ability and control to manage wheel spin and maximize traction than the computer can.

As far as GM not putting limited slip in only the V6 automatics, I can not think of any logical reason. All the axles housing are the same. The only change is the differential itself. They already have the 3.27 gear in some SS's, so it isn't a carrier issue. The cost of the unit is several hundred dollars more, so maybe they felt like they could save the coin because in their research the people who buy the v6 auto are not as likely to notice or care. Again it will act like a limited slip in some cases due to the 300 hp and the way the IRS is set up.

To test if you have limited slip or open, put the passenger rear tire on some ice and see what happens when you accelerate. If it is open, you will just spin the right rear tire because you can not get enough traction to load the spider gears to lock the axle. A limited slip will immediately grab traction with the left rear tire and accelerate right off the ice. Make sure you turn off traction control so the computer doesn't interfer with activating the brakes.

*The_Blur* · 02-07-2011, 04:01 PM

Quote:

Originally Posted by DAL123

The V6/As has a completly smaller differential housing with 3.27 ratio. all the other models V6?M6, V8/A6,V8/M6 Have the same differential housing physically, The V6/M6 and the V8/A6 have a 3.27 gear ratio also but the V8/M6 has 3.45 gear ratio. To get posi in the V6/A6 swap out the half shaft from a V8 and the complete diferential from a V6/M6 or V8/A6 ( same gear ratio no speedo tune needed.) if you use a diff from a V8/M6 you will need to have the speedo sycronized to accomodate the different gear ratio. but will give ya a little more kick ...

We need parts. I'm willing to test this on my LS A6 if some experienced people are willing to help with the install. Can Trifecta tune for this?

GMRULZ · 02-07-2011, 07:07 PM

Not enough power to spin 1 tire in an almost 4k lb car much less 2 tires? I dunno...

*Mr. Wyndham* · 02-07-2011, 08:41 PM

Quote:

Originally Posted by GMRULZ

Not enough power to spin 1 tire in an almost 4k lb car much less 2 tires? I dunno...

If only a part of that were true....

LS3CAM · 02-07-2011, 09:15 PM

Does your build sheet list G80? If so, you have a Posi.

usa1camaro1969 · 02-07-2011, 09:47 PM

Quote:

Originally Posted by GMRULZ

Not enough power to spin 1 tire in an almost 4k lb car much less 2 tires? I dunno...

Good thing I'm not as overweight as the v8's then?

Now go to your room.
Both my tires spin, but I've got a manual. I remember reading the housings are also different between the v6 and v8(not just the diff) and you can't just grab a v8 diff and mount it up.

GMRULZ · 02-08-2011, 07:31 AM

Quote:

Originally Posted by usa1camaro1969

Good thing I'm not as overweight as the v8's then?

Now go to your room.
Both my tires spin, but I've got a manual. I remember reading the housings are also different between the v6 and v8(not just the diff) and you can't just grab a v8 diff and mount it up.

Lol... The extra V8 weight and Whipple weight is not so much of a problem for me with my automatic see sig...

I was just giving you guys a hard time. Good naturedly of course.

GM did it I`m sure, for the one thing GM does for most things. Cost. They figured you guys ddin`t need the limited slip and for whatever reason that rear end setup is cheaper for them to buy/build ect.. Its all about the benji`s I`m sure.

yellowbird · 02-08-2011, 06:46 PM

Its the rectangle shaped button in front of your shifter!

tangorover · 02-21-2011, 02:30 AM

Quote:

Originally Posted by fielderLS3

You'd think using two different differentials instead of one would drive up costs. Maybe there is a production capacity limit, so they don't offer it on their highest volume trim? I can't imagine an engineering problem that would cause it.

More than likely, someone at GM probably did a cost-benefit study and found it saved $3.38 per car.

You will be surprised what companies will do for a couple of bucks. The Mustang for example skipped on a IRS to save a grand per car.

Skexies · 05-13-2013, 03:47 PM

... curious, did anyone ever figure out a nifty way to retro LSD into an auto v6?

01-27-2011, 05:55 PM	#45
DAL123 Drives: 2010 Camaro 2LT/RS/A6 Join Date: Aug 2009 Location: New Bedford, Mass. Posts: 106 View My Garage	Your welcom Devon __________________ Trifecta Tune, Vararam CAI,Self ported Intake Manifold,3/8 Black Iceolator,Rx Catch Can, W/Breather, V8 Rear Diff. 3:45s W/Posi Mod, Mrt V2.0 Axel Back, Magnaflow Resonated X-pipe, Street Scene Front Splitter.,V-Max Trottle Body., Eiback Sway Bars., Phadt End Links.,

02-07-2011, 07:07 PM	#49
GMRULZ Drives: 2010 SS & 2008 C6 Join Date: Mar 2008 Location: VA Posts: 1,819	Not enough power to spin 1 tire in an almost 4k lb car much less 2 tires? I dunno... __________________ 2010 SS L99, 536rwhp 10.843@126.72. Whipple Supercharger stock pulley, ARH 1 7/8 longtubes w/ catted xpipe, magnaflow 3" mufflers, ADM Race CAI, 3:70 gears, lightweight wheels and nitto drag radials. Stock internal L99, stock converter. Bolt on best before blower 12.22@113.29 w/ nothing but ARH headers, catted x-pipe, ADM CAI and a tune on stock Pzero`s! Other car 2008 C6 Ls3, z51, A6, Npp Exhaust, best bonestock pass 11.80@118.82, Number 2 on the Corvette Forums Bonestock fastest list..

02-08-2011, 06:46 PM	#54
yellowbird Drives: 1969 goldenrod yellow bird Join Date: Dec 2007 Location: mesa Az Posts: 21 View My Garage	Its called traction control Its the rectangle shaped button in front of your shifter!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Limited slip - slip up by Chevy	mjf	Camaro V6 LLT Engine, Exhaust, and Bolt-Ons	30	06-24-2015 06:43 PM
LSD (Limited Slip Differential)	cutter5002	V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6)	53	08-20-2010 10:42 PM
Mustangs................	vontivonti	5th Gen Camaro SS LS LT General Discussions	4051	12-21-2009 11:42 PM
Solo Performance V6 Mach-XL (Manual) and Mach-XLT (Auto) Exhaust Kits	GOINGSOLO2	Camaro V6 LLT Engine, Exhaust, and Bolt-Ons	4	12-03-2009 02:59 PM
limited slip?????	kylepo	5th Gen Camaro SS LS LT General Discussions	26	01-30-2009 07:26 PM

01-28-2011, 02:26 PM	#47
Shu71 Drives: 2011 Camaro RS M6 Join Date: Jan 2011 Location: Illinois Posts: 795	A couple of things, a limited slip/posi unit is very different than an open diferential. Even an open dif uses spider gears which when you place enough load on them will cause the drivers rear tire to transfer power to the ground. However, if you accelerate moderately it will not force the axle to rotate at the same speed or torque as the passenger axle. You can in fact help an open dif by adding traction bars. IN this case the IRS setup would aid in making even an open dif spin both wheels. Once the drivers rear breaks loose it will remain locked until you let off the throttle or the car accelerates enough to reduce the load and then it will release. I had a 69 Camaro, 71 Chevelle, and a LeMans that all had open difs but out of the hole always 'caught posi'. I also had several old cars and new trucks with a true posi dif. They have clutches in them which lock both wheels. GM calls them limited slip. They take special limited slip lubricant additive to keep those clutches working correctly. GM also makes a "locker" rear dif and that is antoher beast altogether. Those are typically only put in trucks due to how they lock and unlock they are more built for low speed locking that releases at about 20 to 30 mph. But now I am getting off topic. A limited slip will lock both axle more easily and keep them locked. It takes more (power and chassis setup) to get an open dif to lock. If you jack up a car and spin the passenger wheel by hand, the drivers wheel will spin in the same direction on a limited slip and the opposite direction on an open dif. In the snow, an open rear dif will help keep the car straight if the rear tire loses traction. It hurts if you get stuck though because it will not lock the drivers axle to get you out. Traction control reduces power transmitted to the ground of a slipping wheel. It will help in snowy conditions but will reduce the power to the ground and slow down acceleration which isn't good for racing type applications unless the driver has less ability and control to manage wheel spin and maximize traction than the computer can. As far as GM not putting limited slip in only the V6 automatics, I can not think of any logical reason. All the axles housing are the same. The only change is the differential itself. They already have the 3.27 gear in some SS's, so it isn't a carrier issue. The cost of the unit is several hundred dollars more, so maybe they felt like they could save the coin because in their research the people who buy the v6 auto are not as likely to notice or care. Again it will act like a limited slip in some cases due to the 300 hp and the way the IRS is set up. To test if you have limited slip or open, put the passenger rear tire on some ice and see what happens when you accelerate. If it is open, you will just spin the right rear tire because you can not get enough traction to load the spider gears to lock the axle. A limited slip will immediately grab traction with the left rear tire and accelerate right off the ice. Make sure you turn off traction control so the computer doesn't interfer with activating the brakes.

02-07-2011, 09:15 PM	#51
LS3CAM TheBeerMan Drives: 2010 RS/2SS Camaro LS3 CGM Sunroof Join Date: Dec 2010 Location: So. Cal. Mountains Posts: 82	Does your build sheet list G80? If so, you have a Posi.

05-13-2013, 03:47 PM	#56
Skexies Nobody of Interest Drives: 2012 2LT/RS A6 'vert "Ra" Join Date: Apr 2013 Location: Dallas Posts: 47 View My Garage	... curious, did anyone ever figure out a nifty way to retro LSD into an auto v6?