11-20-2010, 05:49 PM | #1 |
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Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,854
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Rear axle ID???
Anyone know what this is? Is it a posi? What year?
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
11-20-2010, 05:51 PM | #2 |
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Join Date: Feb 2008
Location: Omaha, NE 68144
Posts: 333
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Re: Rear axle ID???
It's a GOV lock as they call it.
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11-20-2010, 05:54 PM | #3 |
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Join Date: Apr 2005
Location: Pensacola, FL
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Re: Rear axle ID???
Are they any good? What are they worth? What did they come in?
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 Last edited by Hart_Rod; 11-20-2010 at 05:54 PM. |
11-20-2010, 07:49 PM | #4 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Rear axle ID???
They are "marginal" at best. In purely stock form and with calm driving, they can last a while.....but if you drive like that, you really don't need a traction device. Adding power, wider tires, or hard use will kill one pretty quickly.
When they go, it's "catastrophic", that is why they are usually called "Gov Bombs" or "Gov Pops". I refer to them as "Timex Posi" for 2 reasons; the tiny internal watch parts, and because you never know how much time you have before it blows. When one fails, the small parts come apart first, and get between the bigger ones. I have not repaired one....and never would.
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11-21-2010, 08:06 AM | #5 |
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Join Date: Dec 1999
Location: Old Mission, MI, USA
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Re: Rear axle ID???
That is an Eaton Automatic Locker as supplied stock by GM in many trucks. They are not intended nor are they any good for doing burn outs.
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Tim |
11-21-2010, 03:32 PM | #6 |
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Join Date: Jun 2009
Location: Oroville, Ca
Posts: 1,624
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Re: Rear axle ID???
The problem with these units is that they are open under normal conditions, then when one tire spins about 100 rpms faster than the other the rear changes to fully locked all at once. This is fine if you are in snow or gravel or some other low traction situation, but if you are on pavement or have a heavy load or whatever the non-spinning tire is firmly planted and instead of it catching up to the spinning tire the small internal parts go snap followed by the big internal parts going BOOM. I have one in my 01 tahoe and I'm sure to go easy on it. I have a friend that had one in his 03 1500 and he tried pulling out someone that was stuck, his failed bad enough that it split the housing nearly in half. So like stated above they work fine for normal driving, but more power or burnouts they won't last long.
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11-21-2010, 04:06 PM | #7 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Rear axle ID???
Once again.... they NEVER completely "lock-up" the "Loc" part of the name is purely marketing hype (BS). The centrifugal mechanism acts upon a ramp that applies pressure to the clutch pack. So it is basically a "variable pressure" clutch-type posi.....that has a built-in self-distruct mode.
It does NOT lock any more than any other clutch-type posi unit can. A true locking differential is a competely different animal.
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You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. |
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11-21-2010, 11:08 PM | #8 | |
Big Red - Now its a SWB!
Join Date: Jun 2009
Location: Oroville, Ca
Posts: 1,624
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Re: Rear axle ID???
Quote:
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68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread 41 3/4 ton (wife's)-flatbed, fully restored to original 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's |
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