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Discussion Starter #1
Anyone know which was the original?

The TrueTrac looks like it uses full length helical planetary gears while the T-2 uses these gears that have one large helical gear and a smaller one.

My guess is the TrueTrac is stronger, but for drag racing using Nittos or slicks, I'd go with a Detroit Locker???

BTW both the TT and T-2 are gear based LSDs.
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