Re: rear axle centerline question, a-body
[Re: Sixpak]
#1659501
08/16/14 08:16 PM
08/16/14 08:16 PM
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Joined: Feb 2013
Posts: 47 sedalia, mo
skj283
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OP
member
Joined: Feb 2013
Posts: 47
sedalia, mo
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good deal. that will ball park me anyways. I will definitely read that article. Upper shock mounts wont be an issue due to the fact I can put them wherever they need to be and driveshaft hasn't been made yet either. I was thinking about just putting it where I felt I had comfortable tire clearance but the way the wheel wells are, if you move it back then you run into clearance issues on the back side of the tire quick. centered in the well, is tight on the front side. thanks again
Last edited by skj283; 08/16/14 08:19 PM.
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Re: rear axle centerline question, a-body
[Re: 340_Dart]
#1659506
08/22/14 02:26 PM
08/22/14 02:26 PM
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Joined: Dec 2005
Posts: 11,551 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,551
Fulton County, PA
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Late to the party, but I'll offer my thoughts. If I were replacing the stock suspension and installing a crossmember and ladder bars, the original location of the rear is irrelevant to me. If I need to open up the wheel opening for a larger tire, I would move the rear centerline forward enough so that I only need to move the front half of the opening forward. If I wanted it in the stock appearing location, I would take everything from under the car, mock the wheel/tire combination in the wheel opening where I wanted it for clearance and apperance and let that determine where the rear goes. Bottom line is, put the wheel where you want it. Let that determine where the rear goes. Also consider that moving the rear forward some will improve the weight distribution. In other words,if you consider the entire rear suspension (rear, bars, crossmember) as a unit, it can be mocked up and measured to determine the distance from the axle centerline to the front of the crossmember. Put the wheels (aka. axle centerline) where you want them and measure forward that assembly dimension. That is where the crossmember will meet the stock floor. Level the car, string line or laser everything, draw it out on the floor and make it straight and square. All of this is assuming you are eliminating the leaf springs.
Last edited by CMcAllister; 08/22/14 02:28 PM.
If the results don't match the theory, change the theory.
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Re: rear axle centerline question, a-body
[Re: CMcAllister]
#1659507
09/26/14 01:26 AM
09/26/14 01:26 AM
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Joined: Feb 2013
Posts: 47 sedalia, mo
skj283
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OP
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Joined: Feb 2013
Posts: 47
sedalia, mo
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just wanted to let you know the last comment didn't fall on deaf ears. That is basically the way I went. I am lowering the car significantly and found the wheel wells on these things are far from symmetrical. I basically found a happy medium on wheel well clearance, and worked from there. I actually came up with 21 inches as of now for a starting point, but its gonna be tight on the front, and plan on trimming the quarters to gain clearance. This is my first ladder bar install, and I have learned a ton along the way. I also found the front eye mounts are off about 3/8 of an inch from square to the frame, so that already invalidates my 21. Planning to tack all my brackets on the rear, and the front crossmember this weekend and start actually fitting it up as it will be installed. came up with about 1 1/8th yoke offset towards the pass side, on a slant 6 crossmember with engine swap mounts that I picked up along the way. I really enjoy this forum due to the patience with newbies. I due have a experienced chassis guy helping me with my million questions I come up with along the way though, so that helps.
Also car is definitely leveled, and I have plotted everything out on the floor with chalk lines and plumb bobs. I have the block and trans in it to find engine centerlines to find yoke offset before I narrow rear. And going to coilovers, with the upper mount located on the down bars from the roll bar also.
Last edited by skj283; 09/26/14 01:37 AM.
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Re: rear axle centerline question, a-body
[Re: skj283]
#1659508
09/26/14 08:29 PM
09/26/14 08:29 PM
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Joined: Jan 2004
Posts: 8,248 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,248
fredericksburg,va
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A-body springs are 20 inches center bolt to spring eye,brackets are 2 inchs, hole to flat where its attached to frame. Meant to add 7 1/4 brackets different than 8 1/4-3/4
Last edited by cudaman1969; 09/26/14 08:32 PM.
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Re: rear axle centerline question, a-body
[Re: DoctorDiff]
#1659517
10/13/14 03:59 PM
10/13/14 03:59 PM
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Joined: Jun 2005
Posts: 2,776 Ontario Canada
MattW
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master
Joined: Jun 2005
Posts: 2,776
Ontario Canada
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Quote:
Looks like a Ford 8.8".
How strong is an 8.8? Do they have adjusters or shims to set the carrier like the Dana S60? Matt
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Re: rear axle centerline question, a-body
[Re: MattW]
#1659518
10/13/14 04:03 PM
10/13/14 04:03 PM
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Joined: Feb 2013
Posts: 47 sedalia, mo
skj283
OP
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OP
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Joined: Feb 2013
Posts: 47
sedalia, mo
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shims. they are pretty stout. been a lot of them in the 9's. I'm putting 9 inch ends on this so I don't have to run c clip eliminators, and im also gonna run aftermarket axles. I figured the money saved on the brakes, gears and lsd, was well worth it though for now. down the road I may go 8 3/4 or 9 inch. hopefully these ford parts don't get me banned from this forum. lol
Last edited by skj283; 10/13/14 04:04 PM.
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