Educate Me on LSD

R/T_Fire said:

Drugs are bad!!!!

Sorry couldn't resist

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Blazin383 said:

Maybe I don't quite understand the function of a Limited Slip Dfferential (LSD) like I thought I did, but I ordered my 15 2500 4x4 with the 6.4 and LSD. I haven't done any off roading with it, but The other day I found myself turning a tight right hand turn off the road on to a very steep concrete driveway. Of course I was in 2-wheel drive on a dry surface, but as soon as the front started up the steep incline it lifted the right rear tire off the road and all forward movement stopped as the right rear wheel sat there spinning in mid air. No power transferred to the left rear wheel. Correct me if I'm wrong here, but isn't the purpose of a LSD to transfer grip to the other side if traction is lost on one side?

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Jimmy68 said:

Sounds broken or wasn't installed.
Jack up your rear differential and by hand spin one tire, transmission in neutral.
If you have a L/S the other wheel will spin the same direction. If not it will spin the opposite direction.

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Dubstep Shep said:

What?

The only time the other wheel will spin backwards is if it's in park. Otherwise the differential itself will just spin with the axles.

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SouthTexan said:

Actually he is correct.

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Dubstep Shep said:

Uhhhh, I can tell you for a fact I've done this on cars and they've both spun even though it's an open diff. It all depends on what has more resistance to turning, the pinion or the other axle.

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SouthTexan said:

The 01 Rams did not come stock with a Detroit/Eaton True Trac. The Detroit/Eaton True Trac is a gear style LSD just like the new trucks. The 01 Rams came with a clutch style LSD.

IIRC, Ram went to the gear style LSD when they switched to using AAM axles instead of Dana axles in 2003 and up year models. Every year model with LSD before 2003 with the Dana 80 Trac Lok limited slip were clutch style LSDs.

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SouthTexan said:

https://youtu.be/T0DeTzQWNBQ

https://youtu.be/JikvViNIhqw

http://www.ehow.com/how_7237928_do-tell-limited-slip-differential_.html

http://www.examiner.com/article/how-to-know-if-your-car-has-a-limited-slip-differential

http://www.differentials.com/technical-help/faqs

http://aftermarket.auburngear.com/general_questions/

http://www.trucktrend.com/how-to/ex...arage-2006-dodge-dakota-limited-slip-rearend/

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jwheeler said:

I know you think you are proving a point with all these videos but that is not always correct. The spinning tire theory only works on a vehicle with a clutch driven limited slip. The vehicle in question in the original post does not have that. It is gear driven. On a rack if you spin the tires it will act just like an open diff. It needs to be under load to lock up. You explained how a Torsen style lsd works in your first post.


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