Axle Too Tight

My car stalled and had it towed to a shop. I have a 66 Chevelle 383 motor (425 hp) with a 350 Turbo trans, 10 bolt posi and spooled 373 gears. Man it was one heck of a job to push the vehicle in the shop's garage. It took four guys to finally push it in. The shop guy told me the reason why it's so hard to push is because it's has Posi and it's spooled, both tires lock and rotate at the same time. I didn't think about it much then until one day I release the parking brake on an incline and the car just stood there.

I am wondering if the Rear axle might be too tight? I thinking of changing the gear to a 4.11 anyway.

I can spin the tires and the car accelerates fine. Will take to track to see what it can do.

A quick check to determine if the rear end is too tight is by simply jacking up the rear housing and placing the gear selector in neutral and then spinnin' it by hand. They should rotate freely.

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Originally posted by TyphoonZR
A quick check to determine if the rear end is too tight is by simply jacking up the rear housing and placing the gear selector in neutral and then spinnin' it by hand. They should rotate freely.

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Thanks for the tip. I jacked up the rear and tied spinning the tire by hand but it had resistance. Can't spin a full rotation. Instead it was more like turning a non-powered steering wheel while making an u-turn.

I can only imagine shaving off 2 seconds or so in the quarter mile.