Re: 8 3/4 powr-lok too tight?
[Re: MoonshineMattK]
#3052455
06/22/22 04:26 PM
06/22/22 04:26 PM
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Joined: Jan 2003
Posts: 18,025 S.E. Michigan
ZIPPY
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S.E. Michigan
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Mine was crazy tight after I rebuilt it. I had to use a little extra additive and go out and drive some figure 8s to make it stop banging around turns.
Rich H.
Esse Quam Videri
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Re: 8 3/4 powr-lok too tight?
[Re: ZIPPY]
#3052458
06/22/22 04:31 PM
06/22/22 04:31 PM
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Joined: Jan 2003
Posts: 13,492 Marion, South Carolina [><]
an8sec70cuda
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Marion, South Carolina [><]
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Mine was crazy tight after I rebuilt it. I had to use a little extra additive and go out and drive some figure 8s to make it stop banging around turns. I've only rebuilt one powr-lok for a Dana 60, but had the same result. Had to use the Ford friction additive Dr. Diff recommended and drive it some. It's fine now.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: 8 3/4 powr-lok too tight?
[Re: MoonshineMattK]
#3052557
06/22/22 09:51 PM
06/22/22 09:51 PM
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Joined: Dec 2004
Posts: 10,607 Rittman Ohio
fourgearsavoy
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Some of the rebuild kits out there use all thick plates and that would be too tight and the plates don't slip like they should. I usually re-use a few of the old thin plates when I rebuild one and it works perfectly. Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: 8 3/4 powr-lok too tight?
[Re: fourgearsavoy]
#3052924
06/24/22 11:06 AM
06/24/22 11:06 AM
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Joined: Sep 2017
Posts: 305 NW Illinois
MoonshineMattK
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Some of the rebuild kits out there use all thick plates and that would be too tight and the plates don't slip like they should. I usually re-use a few of the old thin plates when I rebuild one and it works perfectly. Gus This unit was from Dr Diff Does he use thicker plates you describe?
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Re: 8 3/4 powr-lok too tight?
[Re: MoonshineMattK]
#3052968
06/24/22 12:52 PM
06/24/22 12:52 PM
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Joined: Jan 2003
Posts: 26,470 Rio Linda, CA
John_Kunkel
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Dr Diff sells two clutch kits, one for factory and another for aftermarket. If you're not sure which one you had.................
The INTERNET, the MISinformation superhighway
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Re: 8 3/4 powr-lok too tight?
[Re: John_Kunkel]
#3053664
06/26/22 10:13 PM
06/26/22 10:13 PM
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Joined: Sep 2017
Posts: 305 NW Illinois
MoonshineMattK
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Dr Diff sells two clutch kits, one for factory and another for aftermarket. If you're not sure which one you had................. did not buy a rebuild kit. Bought a whole new power-lok
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Re: 8 3/4 powr-lok too tight?
[Re: John_Kunkel]
#3053669
06/26/22 10:19 PM
06/26/22 10:19 PM
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Joined: Sep 2017
Posts: 305 NW Illinois
MoonshineMattK
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Been a couple years but I believe this is the unit https://www.doctordiff.com/8-3-4-clutch-type-sure-grip-powr-lok.htmlMy question is: He hears a clunk in short turns. I don't think its the power-lok. I think its the street lynx suspension. Because the suspension is 4link with rod ends there is not the usual thick rubber insulation. The only thing I can think is that the inside tire drags when he turns sharp. If that tire bounces a bit and unloads/loads the suspension it might make the bang/clunk he's hearing. Both my cars with power-lok 8 3/4 axles drag the tire on tight turns. But they never bang or clunk.
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Re: 8 3/4 powr-lok too tight?
[Re: MoonshineMattK]
#3053677
06/26/22 10:48 PM
06/26/22 10:48 PM
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Joined: Nov 2007
Posts: 21,909 Kirkland, Washington
Pacnorthcuda
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Kirkland, Washington
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I just don't see how the power-lok could make a clunk sound. There's nothing in it to clunk. They clunk when the clutch packs bind up until the force applied overcomes the bind and then they release, somewhat violently. Rather than a smooth ‘limited slip’.
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Re: 8 3/4 powr-lok too tight?
[Re: MoonshineMattK]
#3053739
06/27/22 08:57 AM
06/27/22 08:57 AM
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Joined: Dec 2004
Posts: 10,607 Rittman Ohio
fourgearsavoy
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Rittman Ohio
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Dr Diff sells two clutch kits, one for factory and another for aftermarket. If you're not sure which one you had................. did not buy a rebuild kit. Bought a whole new power-lok Not the first time I've heard of this condition with a "new" Power-Lock unit. They are simply set up too tight from the factory IMHO Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: 8 3/4 powr-lok too tight?
[Re: fourgearsavoy]
#3053794
06/27/22 12:46 PM
06/27/22 12:46 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
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Bend,OR USA
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Dr Diff sells two clutch kits, one for factory and another for aftermarket. If you're not sure which one you had................. did not buy a rebuild kit. Bought a whole new power-lok Not the first time I've heard of this condition with a "new" Power-Lock unit. They are simply set up too tight from the factory IMHO Gus I sold one to a customer of mine that is a lawyer, he had it removed and replaced with gear type posi due to it almost making his 1967 Plymouth 440 powered GTX convertible go into the ditch across the street turning at a corner making a 90-degree right hand turn at or slower than 5 MPH:: puke: I'm wondering if doing several hard burn outs might loosen them up some to make them like the stock clutch type posi are?
Last edited by Cab_Burge; 06/27/22 12:48 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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