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#1 |
Senior Member
![]() Join Date: Jul 2008
Location: kennewick, WA
Posts: 1,508
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whats a posi sound like?
i had a posi unit put in my rear end and i drove it around to day and it sounded like chains binding. i thought that they made the tires chirp??? is this ok?
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1965 c/10 swb 1969 c/10 lwb ![]() |
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#2 |
Registered User
Join Date: Dec 2008
Location: Austin, MN
Posts: 117
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Re: whats a posi sound like?
Mine sounds like totally worn out brake shoes on the drum (metal on metal). I don't know if it's a problem or not. Tires do chirp if I hit it just a little turning a corner.
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#3 |
Registered User
![]() Join Date: Oct 2006
Location: Guston, Ky
Posts: 79
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Re: whats a posi sound like?
What type of posi is it?
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IF A FELLA DOESN'T USE HIS HEAD....... HE MIGHT AS WELL HAVE TWO BUTTS ![]() 1969 C10 LWB "Granpaps Truck" (Project) 2000 K3500 Crew Cab LWB (Farm Truck) 2007 Chevy 1500 Crew Cab 5.3 (Daily Driver) |
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#4 |
Registered User
Join Date: Jan 2009
Location: Pittsburg PA
Posts: 246
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Re: whats a posi sound like?
sounds like you will be putting in some extra hours to pay for a rebuild. unless its a locker it should be silent
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#5 |
Sisyphus was my mentor!
![]() Join Date: Sep 2002
Location: Carleton Place, Ontario CANADA
Posts: 984
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Re: whats a posi sound like?
It could be that the posi additive is worn out. It wears out over time & needs to be replaced. It's a lot cheaper than diving into a rearend rebuild that you might not need.
http://paceperformance.com/index.asp...D&ProdID=29478
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passthebuck ![]() #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car |
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#6 |
Registered User
![]() Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
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Re: whats a posi sound like?
It should sound like squeeling in stereo.LOL!
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Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299 |
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#7 |
sharp as a marble
![]() Join Date: Jan 2007
Location: atlantic beach,florida
Posts: 1,082
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Re: whats a posi sound like?
If it is a stock type ( eaton I think ) they will have a set of clutches that can get glazed. Drain the rear end, and use a high quality 90w synthetic gear lube, and the GM positraction additive. I know that there are additives out there in the aftermarket, but GM's friction modifier is the best. After getting the truck back together find somewhere you can drive a very tight circle in one direction, and then in the other this will work the new fluids into the clutches in the rear end.
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#8 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: whats a posi sound like?
Hopefully changing fluid and additive will help.That won`t un-glaze the clutches.A posi makes no noise.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#9 |
My Carbon Footprint
Join Date: Oct 2008
Location: Orygun
Posts: 5,527
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Re: whats a posi sound like?
Dang....give us more info on the install. Sounds like they didn't get it back together the way it came out. Shouldn't have any sound with regular driving.
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#10 |
Senior Member
![]() Join Date: Jul 2008
Location: kennewick, WA
Posts: 1,508
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Re: whats a posi sound like?
the guy that rebuilt it for me said it was good up to 80 foot lbs on his torque wrench, also it only does it a little bit when i take a corner real sharp, and in the gravel both tires will spin like they should.
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1965 c/10 swb 1969 c/10 lwb ![]() |
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#11 |
Senior Member
![]() Join Date: Jul 2008
Location: kennewick, WA
Posts: 1,508
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Re: whats a posi sound like?
and yes it is a GM one
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1965 c/10 swb 1969 c/10 lwb ![]() |
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#12 |
Under Construction
Join Date: Oct 2007
Location: Midlothian,TX (DFW)
Posts: 4,555
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Re: whats a posi sound like?
did he add the additive when it was rebuilt? also wondering if it was shimmed properly....
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Heath subscribe to the board here: http://67-72chevytrucks.com/vboard/payments.php http://67-72chevytrucks.com/vboard/s...d.php?t=157669 FAQ how to's 1956 Chevy Apache 1967 C10 SWB FleetSide (under construction) 1969 K10 SWB FleetSide (Future Build) 1972 C10 SWB Stepside (Future Build) 56 chevy truck : http://www.cardomain.com/ride/2955823/1 67 truck build: http://www.67-72chevytrucks.com/vboard/showthread.php?t=281357/1 69 k10: http://67-72chevytrucks.com/vboard/s...d.php?t=389470 Last edited by my67chevytruck; 07-14-2009 at 12:44 PM. |
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#13 |
*** That's interesting ***
Join Date: Oct 2008
Location: Pittsburgh, PA
Posts: 2,772
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Re: whats a posi sound like?
+1 on the GM "limited slip" additive. Very important. Others brands have never worked for me on GM units. Without it, the rear will bind and pop or grind on turns.
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Tom ![]() Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others... |
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