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#1 |
Senior Member
Join Date: Feb 2004
Location: Ponca city now kingfisher Oklahoma
Posts: 1,221
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posi check
I had a guy who had a posi in a older 64 and He said the way to tell if it had one was put it in neutral jack up one wheel off the ground and try to turn the tire. If its got a posi it wont turn. He showed this, jacking up one side.
Does everyone agree with this? I'm going to a junkyard to look for a 6lug posi and I know most of the trucks are 60-66. Theres no buid sheet on the glove box of these and I'm not pulling every rear end cover off this guys place to look for one. Is the method the best way to look for one? Thanks david
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Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing. |
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#2 |
Registered User
Join Date: Dec 2006
Location: Wesley Chapel, Florida
Posts: 1,113
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Re: posi check
That is correct. If it is just an open diff. The wheel off the ground will rotate by independatly. Yes it is a method to tell. The best way is to verify by pulling the cover. But I agree I don't like being under junkyard vehicles at all.
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2004 Chevy Silverado 1500LS SWB 5.3L 2004 Corvette Z16 #770 Wish I had not sold 72 blazer |
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#3 | |
Registered User
Join Date: Oct 2006
Location: Arizona
Posts: 835
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Re: posi check
Quote:
What is going on with mine? Anyone know?
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67 Short Step, 355, 700R 4.11 posi rear, 4/6 drop Discs on all 4 corners. Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=219094 Last edited by whatnow123; 02-19-2007 at 12:43 PM. |
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#4 |
Registered User
Join Date: Feb 2006
Location: Republic of California
Posts: 345
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Re: posi check
I believe that is correct and that's how I'd do it.
But I wonder if this method could tell you anything about the condition of the posi unit. Even though you can't turn it by hand, it still might not leave two equal length black strpes? Maybe someone can tell us how to test if the posi is still good. The only method I can think of is if the truck is powerful enough to roast two tires without using the brakes (since applying the brakes can have a posi effect itself).
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'67 C10 Short Stepside 5.0TPI/700R4 |
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#5 |
Senior Member
![]() Join Date: Aug 2003
Location: Conyers,Ga.
Posts: 7,287
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Re: posi check
Not true if the clutches are worn.
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#6 |
Purple People Eater
Join Date: Dec 2006
Location: Houston
Posts: 53
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Re: posi check
This should work, correct?: jack the rear end up (both tires)
if the tires rotate opposite, you're open (that's why you have to set the parking brake when you're rotating tires on a regular 2wd with an open diff - you'll rotate it off of the jack) if the tires rotate together, you've got a posi
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1971 K5 Blazer 396ci/TH400/NP205/Dana 44/GM 12 Bolt/38" TSLs 2004 Chevy 1500 4X2 X-Cab 327ci |
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#7 |
Senior Member
Join Date: Nov 2005
Location: AL
Posts: 2,519
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Re: posi check
I just installed a eaton posi today and both axles turn the same way and before with the open they turned oppsite of each other. If you have a posi one should not turn if the other is on the ground. Don't hold me to this.
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#8 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: posi check
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#9 | |
village idiot
Join Date: Oct 2006
Location: Barbourville,KY
Posts: 178
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Re: posi check
Quote:
I had this issue with my old 68 C10,468/th400 with a supposedly 12 bolt "posi".It would only spin one wheel (alot) no matter what,pulled it apart to install a locker and was surprised with a posi carrier |
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