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Rear thrust angle #1792711 03/31/15 06:46 PM 03/31/15 06:46 PM
Joined: Mar 2014 Posts: 235 Oregon D Dr Dave OP enthusiast
Dr Dave OP enthusiast D Joined: Mar 2014 Posts: 235 Oregon	I was reading on the Hotchkis site about shims to correct midline alignment between the front and rear wheels ( thrust alignment) by shimming the rear leaf spring mount. They talk about using an alignment shop to measure and determine if there is a misalignment. How can we do this accurately at home? I think I may have this issue as my car (Cuda) does not want to launch straight under heavy acceleration. Thanks!

Re: Rear thrust angle [Re: Dr Dave] #1792712 03/31/15 06:52 PM 03/31/15 06:52 PM
Joined: May 2003 Posts: 96,649 On The Boat, On The Lake, Wa. ... amxautox Still Retired. Still Posting on Moparts. A Lot.
amxautox Still Retired. Still Posting on Moparts. A Lot. Joined: May 2003 Posts: 96,649 On The Boat, On The Lake, Wa. ...	Tape it. Also check that all the bushings in the rear leaf shackles, etc., are good. Tom "Everyone should believe in something; I believe I'll go fishing." -Henry David Thoreau Men and fish are alike. They both get into trouble when they open their mouths author unknown

Re: Rear thrust angle [Re: amxautox] #1792713 03/31/15 10:59 PM 03/31/15 10:59 PM
Joined: Nov 2003 Posts: 3,577 Long Island, NY USA B BergmanAutoCraft master
BergmanAutoCraft master B Joined: Nov 2003 Posts: 3,577 Long Island, NY USA	I invented those shims years ago. I keep them in stock on my site - Bergmanautocraft.com. Let me know with any questions.

Re: Rear thrust angle [Re: BergmanAutoCraft] #1792714 03/31/15 11:02 PM 03/31/15 11:02 PM
Joined: Nov 2003 Posts: 3,577 Long Island, NY USA B BergmanAutoCraft master
BergmanAutoCraft master B Joined: Nov 2003 Posts: 3,577 Long Island, NY USA	Dave - Best thing to do is to find one of the frame measurement holes that is symmetrical left to right. I do a cross measurement from the hole in the frame to the center bolt of the leaf spring. That will give you a good idea of what is going on in the rear. Usually, the pass side needs a shim or two. I make them in 1/8".

Re: Rear thrust angle [Re: BergmanAutoCraft] #1800423 04/10/15 05:31 PM 04/10/15 05:31 PM
Joined: Sep 2005 Posts: 6,516 Santa Cruz, California L Lefty master
Lefty master L Joined: Sep 2005 Posts: 6,516 Santa Cruz, California	Originally Posted By BergmanAutoCraft Dave - Best thing to do is to find one of the frame measurement holes that is symmetrical left to right. I do a cross measurement from the hole in the frame to the center bolt of the leaf spring. That will give you a good idea of what is going on in the rear. Usually, the pass side needs a shim or two. I make them in 1/8". Slick The FSM should have the chassis drawings in the body section that shows the correct frame measurement hole locations.

Re: Rear thrust angle [Re: Dr Dave] #1800452 04/10/15 06:27 PM 04/10/15 06:27 PM
Joined: Jan 2011 Posts: 4,785 Utah and Alaska astjp2 master
astjp2 master Joined: Jan 2011 Posts: 4,785 Utah and Alaska	I would take it to an alignment shop, they can do it and its no headache! 1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta I didn't do 4 years and 9 months of Graduate School to be called Mister!

Re: Rear thrust angle [Re: astjp2] #1800698 04/10/15 10:56 PM 04/10/15 10:56 PM
Joined: Nov 2003 Posts: 3,577 Long Island, NY USA B BergmanAutoCraft master
BergmanAutoCraft master B Joined: Nov 2003 Posts: 3,577 Long Island, NY USA	If you can find an alignment shop that not only can do a real alignment adjusting caster camber and toe, that's a feat in itself these days. To go the extra mile and be able to measure and correct thrust angle is not going to be easy with the current crop of "set the toe and let it go" mentality.

Re: Rear thrust angle [Re: Dr Dave] #1801097 04/11/15 03:44 PM 04/11/15 03:44 PM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	Took me a while to find a good alignment shop, but I go to the one that does all the heavy duty trucks in town. They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

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