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yes and no
All of the stock SC ones are that way and have traklok.
MarkVIII & Cobra also have 8.8 and the whole housing is aluminum.
The Mark doesn't come with traklok but both will fix our MN12s.
Good Luck
 

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All of the stock SC ones are that way and have traklok.

Actually not all SC's came with trac-lok. All 89-93 auto's and 5 speeds came with trac-lok. 94 & 95 5 speeds came with trac-lok. 94 & 95 auto's came with an open differential.
 

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Ok,

Open differential, Trak lock.. wait a minute! how do you keep the oil from spilling, in the open differential? :p

Seriously though, I never did understand which is better.

????
 

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open differential-one wheel peel (side with LESS traction)
trak lok, positraction, locker-diff. ways to transfer power EQUALLY to both wheels

as for which ones better-some posi, or lockers mainly cause your rear to hop around corners b/c the inside wheel can't spin slower. but all in all, any form of locker or posi is better.
 

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"Posi"

No "Posi" ever came in ANY Ford product. However Eaton does make an aftermarket "Posi" unit for the 8.8" Ford housing now. Trac-Loc is what SC's have (except as noted above).

A Trac-Loc does NOT hop the inside wheel in a turn. The clutch plates in the diff. allow each wheel to rotate at a different speed, once the bias pressure is overcome by the TQ difference from each wheel.

A Detroit Locker remains locked to each axle EXCEPT during the time that is actually ractheting. During that time, power is only applied to the axle that is still locked.

68COUGAR
 
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