What about this one? ......posi unit - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-07-2006, 02:52 AM
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What about this one? ......posi unit

Hi guys still trying to complete my project. What do you guys think about this posi unit. Is this the Gov loc nightmare that everyone wans about? Would be putting some real horse to it so would like to know now what im getting into. Looking to build an awesome weekend cruiser.


http://cgi.ebay.com/ebaymotors/ws/eB...7937502&rd=1,1

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Old 12-07-2006, 07:20 AM
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PASSIVE LOCKERS

Gov-lock(G/L) Used by General Motors in 73 & newer trucks that came with an option locking / limited slip differential. It was used in 7.5", 7.625", 8.5", 8.6", 8.875" 12 bolt truck, 9.5", 10.5", and now in the new 11.5" differentials. The smaller designs are fairly weak and the 8.5" and 12 bolt truck designs are especially weak. The 9.5" and 10.5" 14T units are fairly strong and will hold up well to towing and moderate abuse. The Gov-Lock is designed to act as an open differential during normal driving with no force being applied to clutches. This fact that no force is applied to the clutches keeps the clutches from chattering during normal every day driving. When either wheel slips and spins approximately 100 rpm faster than the other a governor assembly senses the difference in speed and activates a ramp system. The ramp system causes the clutches to engage and transfer power to the wheel with traction. One other feature of the Gov-Lock is that it will not engage at vehicle speed above 30 mph. This no lock-up feature keeps the vehicle more stable at higher speeds where both wheels spinning could cause an inexperienced driver to spin out or slide off of the road. This is a great design in theory and works as designed in a stock vehicle that is not abused. The problem is that most of us modify our trucks and many of us abuse them. When this unit is asked to deliver under extreme conditions it tends to self-destruct. The force generated by the ramp system that is used to lock-up the clutches works well, except that same force has to be contained by the case and the case is not always up to the job. (factory)

http://www.offroaders.com/tech/limit...ferentials.htm
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Old 12-07-2006, 10:33 AM
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well i see that you already bought it off ebay, i would not have suggeted it, i have one in my truck and if you intend to do any burnouts look the other way i hate mine.
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Old 12-07-2006, 11:07 AM
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Would prbably just try and sell it back. Fingers got eitchy and I bought it thinking a posi was posi. burnouts are not a concern as I dont 't want to waste the rubber. (damn hotrod is making me cheap!) Just want a solid rear that will hold 3.73 gears and give some advantage over the open rear. It is at least better than an open carrier isn't it? This unit was said to be rebuilt to eliminate some of the common weakness. Any stock in that? I jus wanna go fast!!
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Old 12-07-2006, 11:21 AM
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yeah im not that expierenced in any means just of what ive done, it def has advantages over the open i had before. I like the saying " a posi will get you out of the ditch it got you in". This system helps you stay out of that ditch, but after it locks in, its all there. i guess it isnt that bad just not what i was expecting out of the switch.
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Old 12-07-2006, 12:59 PM
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about how much HP are you giving it? Do you have a problem with the "noise"?
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Old 12-07-2006, 05:27 PM
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No good

The guys around here call that rear end "the coo-coo clock" basically saying its a time bomb. it doesn't lock up consistently. This info is only word of mouth, I have no personal knowledge but the info came from somebody I trust. He says its not too bad for 4x4's but definitely not for hot rods.

JMO

Mike
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Old 12-07-2006, 05:40 PM
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The gov-lock carrier in my 1974 4x4 GMC spit parts through the tin cover .

Granted ........I did have a supercharged small block in the truck at the time.

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Old 12-07-2006, 09:11 PM
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Old 12-09-2006, 11:43 AM
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im putting out somewhere around 350 hp and 425 ft lbs of torque.
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Old 12-10-2006, 09:26 AM
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nuff said. This thing will never see my roller.
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