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69 A body rear shackles keep snapping #2331528 07/04/17 07:17 PM 07/04/17 07:17 PM
Joined: Apr 2010 Posts: 141 Ohio, USA D Donny OP member
Donny OP member D Joined: Apr 2010 Posts: 141 Ohio, USA	I'm converting my rear suspension to Caltracs, I'm using stock rear shackles, I've snapped two of the bolts while tightening the nuts. One time it snapped before I torqued them, the second time it snapped while torquing them. Anyone have issues with these shackles? I don't know what brand or exactly where they were made, got one pair from a friend NIB and I believe they were purchased from Mancini Racing. I've got it all assempbled now, but I am lacking confidence that these shackles will hold up.

Re: 69 A body rear shackles keep snapping [Re: Donny] #2331538 07/04/17 07:35 PM 07/04/17 07:35 PM
Joined: Apr 2010 Posts: 4,154 bethlehem pa M mikemee1331 master
mikemee1331 master M Joined: Apr 2010 Posts: 4,154 bethlehem pa	i've never had the bolt snap and can't figure out how that could happen. i have had them come loose from the press fit but even that is more annoying than anything else. are you sure the bushings are the right ones?

Re: 69 A body rear shackles keep snapping [Re: mikemee1331] #2331550 07/04/17 08:12 PM 07/04/17 08:12 PM
Joined: Apr 2010 Posts: 141 Ohio, USA D Donny OP member
Donny OP member D Joined: Apr 2010 Posts: 141 Ohio, USA	Originally Posted By mikemee1331 i've never had the bolt snap and can't figure out how that could happen. i have had them come loose from the press fit but even that is more annoying than anything else. are you sure the bushings are the right ones? All the parts are correct, I'm wondering if it is defective cheap parts possibly made in China. This has all happened during assembly with no weight of the car on the suspension yet, so that scares me a bit.

Re: 69 A body rear shackles keep snapping [Re: Donny] #2331557 07/04/17 08:42 PM 07/04/17 08:42 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	for peace of mind I would get a used set in there & chase/torque the threads. EDIT used original set I neglected to say. Last edited by RapidRobert; 07/04/17 09:51 PM. Reason: missed something live every 24 hour block of time like it's your last day on earth

Re: 69 A body rear shackles keep snapping [Re: Donny] #2331577 07/04/17 09:25 PM 07/04/17 09:25 PM
Joined: Apr 2010 Posts: 141 Ohio, USA D Donny OP member
Donny OP member D Joined: Apr 2010 Posts: 141 Ohio, USA	Any particular brand anyone would recommend if I buy another set?

Re: 69 A body rear shackles keep snapping [Re: Donny] #2331591 07/04/17 09:43 PM 07/04/17 09:43 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	Dorman brand from the AP store if available or whatever Firm Feel sells would be my suggestion. Or used original. I am still running originals with upgraded springs and suspension.

Re: 69 A body rear shackles keep snapping [Re: Donny] #2331631 07/04/17 11:10 PM 07/04/17 11:10 PM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	I broke a couple with ease about 30 years ago. They were mopar performance/direct connection pieces. I would have hoped they got those issues corrected by now. I still re-use sometimes, the factory jobs as of late.

Re: 69 A body rear shackles keep snapping [Re: buildanother] #2331646 07/04/17 11:35 PM 07/04/17 11:35 PM
Joined: Dec 2004 Posts: 10,554 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,554 Rittman Ohio	Most off these use a mechanical lock nut and don't need to be very tight. I just use an open end wrench to tighten them and that is all you need. Once the nut stops against the shackle STOP TIGHTENING IT or you will snap it off. Gus 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

Re: 69 A body rear shackles keep snapping [Re: fourgearsavoy] #2331693 07/05/17 12:40 AM 07/05/17 12:40 AM
Joined: Aug 2003 Posts: 43,190 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,190 Bend,OR USA	Originally Posted By fourgearsavoy I just use an open end wrench to tighten them and that is all you need. Once the nut stops against the shackle STOP TIGHTENING IT or you will snap it off. Gus The A body thread size is a lot smaller than the B and E body size hangars, don't use the wrong torque specs. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: 69 A body rear shackles keep snapping [Re: Cab_Burge] #2331699 07/05/17 12:52 AM 07/05/17 12:52 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	^ agreed, all I do is A bodies & the diameter of the short threaded end of the shank is pretty small. live every 24 hour block of time like it's your last day on earth

Re: 69 A body rear shackles keep snapping [Re: Donny] #2331802 07/05/17 10:37 AM 07/05/17 10:37 AM
Joined: Oct 2003 Posts: 11,684 W. Kentucky justinp61 I Live Here
justinp61 I Live Here Joined: Oct 2003 Posts: 11,684 W. Kentucky	I used Prothane shackles on my Dart. https://prothane.com/

Re: 69 A body rear shackles keep snapping [Re: Donny] #2331811 07/05/17 11:14 AM 07/05/17 11:14 AM
Joined: Jan 2003 Posts: 13,593 md M mopars4ever I Live Here
mopars4ever I Live Here M Joined: Jan 2003 Posts: 13,593 md	maybe find a NOS set? mopar part 3004822

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