posi trac
New User
Joined: Jul 2002
Posts: 8
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From: Kingsport
posi trac
the easiest way to tell a posi from an open differential is to jack both rear wheels off the ground and turn one of the tires. if one turns one way and the other turns opposite its not a posi. if they turn the same direction it is a posi.
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Joined: Jan 2008
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Senior User
Joined: Jun 2003
Posts: 188
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From: Wesley Chapel, FLA
If they EVER turn the same direction it's limited slip, if they ALWAYS turn opposite then it's not. Limited slip may not always turn opposite in the jacked up situation, a "normal" rear end will ALWAYS turn opposite. Limited slip may not turn at all on the other side in that situation. Turn the passenger side when testing.
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Fleet Mechanic
Joined: Aug 2001
Posts: 1,526
Likes: 0
From: Round Rock, TX
3.25:1 axle ratio. It's an economy ratio; the engine will turn lower RPMs but has to put in more effort to get the truck moving. It's more suited to highway cruising than pulling mobile homes away while their owners sleep. And it's not limited-slip, so it's possible for one wheel to spin while the other does nothing.
