What is "DSA - Anti-Spin Differential Rear Axle "? - JeepForum.com
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Unread 07-29-2006, 04:51 PM   #1
61 uni
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Join Date: Jul 2006
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What is "DSA - Anti-Spin Differential Rear Axle "?

Just got the build sheet for my 99. Is this posi or a locker.

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Unread 07-29-2006, 04:53 PM   #2
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2005 LJ Wrangler 
Join Date: Feb 2003
Location: Ellicott City MD
Posts: 2,215
posi most likley
2005 Unlimited Rubicon Hard N Soft Tops, Clayton Long Arm on RE Coils, Warn Bumper/Tire Carrier, Warn Winch N Bumper, Currie Steering, JKS Quicker Disconnects, JKS Front Trac Bar, Bilsteins, CO2 System..Yada Yada Yada
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Unread 07-29-2006, 05:41 PM   #3
1999 TJ Wrangler 
Join Date: Jun 2006
Location: Nova
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jeep only did a posi unit at that time, mine used to have one it may not be the best but it way better than being open
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Unread 07-29-2006, 06:27 PM   #4
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1993 YJ Wrangler 
Join Date: Apr 2003
Location: Northern Illinois
Posts: 1,812
Thats what DC calls a limited slip diff. So you have a Limited Slip. Make sure you use limited slip additive if you change your differential fluid. Heres an explanation of what a limited slip is:

Limited slip differentials (LSD's) come in a variety of designs. Most use friction plates, cones and/or gears to reduce slippage between each of the tires. these units have a dual power path from the differential case to the axle shafts. some power is transmitted through the spider gears to the side gears in the conventional manner. The remainder is transmitted by friction between the differential case and the clutch plates and the side gears. A certain amount of "clutch preload" is built into the unit in a static condition. Then, as load is applied to the differential, the separation forces between the spider gears and the side gears increases this clutch loading. This increase in friction provides for a good positive power flow from the case directly to the side gears. When traction is available to both wheels, the power going to the differential causes the plates to bind tightly together, giving even power to both wheels. However, in a situation where there is little or no traction available to either one wheel or the other, the amount of power that can be transmitted to the other wheel which has traction is dependent on the friction or "preload" in the clutch plates. High levels of "clutch preload" will result in good torque transfer but some chattering of the clutches during cornering may occur. Lower levels of preload results in minimal chatter but reduced levels of torque transfer to the wheel with traction. Because LSD's restrict true differential action, tire wear is accelerated. Changes in vehicle handling may also occur, particularly in short wheelbase vehicles. Wear rates on limited slip differentials are generally higher than on other types due to the reliance on friction to reduce wheel slippage. Also, special lubricants may be required to minimize rough and noisy operation. Despite their limitations, LSD's are popular as original equipment options as well as an aftermarket replace because:

  • Some traction improvement off road is provided
  • Vehicle handling idiosyncrasies are not excessive
  • Installation is simple
  • Cost is reasonable
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