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  #1  
Old 10-20-2013, 11:47 AM
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Default Torsen style diff/LSD

I asked this question in another thread, but maybe it should have its own thread. I am wondering where this info comes from. I have read it in a few threads. Being excited that we didn't have the clutch pack lsd that wears out, I wanted to read about the new LSD but I cant find an ounce of official info about ram using this in the 1500's. Does anyone have some info about this? I would have thought that ram would be bragging this up and info would be easier to find.
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Old 10-20-2013, 12:31 PM
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You'd be surprised how many people are clueless about differentials. I test drove a 2014 Silverado at the Texas State Fair, and asked the Chevy rep who was riding with me what the diff ratio was in the truck. Not only did he not know, he didn't know what ratios were available. In fact all he could tell me about it was that it had an auto e-locker (which is badass by the way). Most of my friends have no idea what type of diff their trucks have either.

Anyway, to answer your question here is a link to an article on Allpar that talks about the LSDs. Its in the axles section in the last paragraph.

http://www.allpar.com/model/ram/dodg...owertrain.html

I was also excited to find that they went away from clutch pack LSDs in the 2013s since my truck has the 3.21 LSD rear. In my opinion clutch pack LSDs are more trouble than they're worth.
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  #3  
Old 10-20-2013, 12:40 PM
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Quote:
Originally Posted by Thunderhorse View Post
You'd be surprised how many people are clueless about differentials. I test drove a 2014 Silverado at the Texas State Fair, and asked the Chevy rep who was riding with me what the diff ratio was in the truck. Not only did he not know, he didn't know what ratios were available. In fact all he could tell me about it was that it had an auto e-locker (which is badass by the way). Most of my friends have no idea what type of diff their trucks have either.

Anyway, to answer your question here is a link to an article on Allpar that talks about the LSDs. Its in the axles section in the last paragraph.

http://www.allpar.com/model/ram/dodg...owertrain.html

I was also excited to find that they went away from clutch pack LSDs in the 2013s since my truck has the 3.21 LSD rear. In my opinion clutch pack LSDs are more trouble than they're worth.
Thanks Bro, I was happy my Ram had a LSD but when I read about the torsen style I was pretty excited.. I should have thought to check allpar.. thanks again!
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Old 10-20-2013, 01:31 PM
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Everything you could ever want to know about the limited slip axles in todays RAM's:

The purpose of the Limited Slip Differential is to provide a torque bias within the differential allowing torque to be transmitted to the high traction tire in a variety of traction situations. The Limited Slip Differential is a torque sensing device and is not dependent on vehicle speed. Using the vehicle traction control system in combination with the Limited Slip Differential enhances the vehicles traction capability. The Limited Slip Differential is a non-preload design, this provides optimal fuel efficiency while still maintaining improved traction performance. The Limited Slip Differential operates as a torque sensing device because when torque is applied to the differential gear set the reaction forces of the bevel gears apply an axial force into the clutch system providing the torque bias. When the input torque is very low the reaction forces will decrease allowing the differential to act similar to an open differential (zero preload). Under normal operation the differential gears can be turned by hand.


They should really put this crap in the owners manual.
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Old 10-30-2014, 06:46 PM
matthewjrose87 matthewjrose87 is offline
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Sorry to bring this back from the dead...

Just changed the gear oil in my brand new '14 Ram Express w/ 3.92 Anti-Spin. It's definitely a clutch type posi.
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  #6  
Old 10-30-2014, 07:22 PM
Dadsgotahemi Dadsgotahemi is offline
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Quote:
Originally Posted by matthewjrose87 View Post
Sorry to bring this back from the dead...

Just changed the gear oil in my brand new '14 Ram Express w/ 3.92 Anti-Spin. It's definitely a clutch type posi.
Helical gear/Torsen lsd's are in the Hd's, not the 1500's but you already now that

Maybe the previous poster misunderstood what he posted

The Limited Slip Differential operates as a torque sensing device because when torque is applied to the differential gear set the reaction forces of the bevel gears apply an axial force into the clutch system providing the torque bias. When the input torque is very low the reaction forces will decrease allowing the diffe
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Last edited by Dadsgotahemi; 10-30-2014 at 07:28 PM.
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  #7  
Old 10-31-2014, 08:17 AM
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matthewjrose - Curious why you changeed the fluid out already on a new '14 and second, isn't there a drain plug on the rears now? I haven't touched mine yet, but noticed, what appears to be, a large hex plug/screw in the lower front portion of the rear pumpkin. I was assuming that it was a drain which would be a wonderful thing not to have to rip the diff open every time.
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Old 10-31-2014, 08:41 AM
matthewjrose87 matthewjrose87 is offline
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My axle builder advised that I change it after 500 miles to remove the break-in material from the fluid. I held out until 4,000 miles, then changed it. The cover was removed so I could wipe out the thick sediment in the bottom of the housing. After this first change, I will just use the drain plug. It's located on the right side of the housing right by the cover. The fill plug is just a rubber plug that pops in and out easily.
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