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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Rear Drivelines, Drive Axles and Gearing => Topic started by: Dcraine101 on December 18, 2016, 06:22:16 pm
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What's up guys I recently bought a 83 c10 and I'm trying to figure out if it has posi. But I jacked up the rear end and it's weird. If I spin the passenger tire slowly the driver side spins in the same direction but if I spin it fast the opposite tire doesn't spin! And sometimes it'll even spin the opposite direction! So I don't know if it's an open diff or not! Any help would be appreciated! But no matter what if I spin it slowly forward they both spin in the same direction
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Pull the cover and inspect, probably needs new gear oil anyway.
Have someone hold the other side.
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what capt said, its probably open but just jack up one side if its a locker it will engage and you won't be able to spin it. if its a slip you will hear it try to engage. factory slips (some aftermarket) require wheel speed to engage the clutches you will not be able to do that by hand.