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  #41  
Old 01-05-2009, 09:22 AM
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Quote:
Originally Posted by C. Boyer
That's what I did and the smoothness is insane. Remove the front driveshaft and have it fabricated so it doesnen't bottom out. I did that too. You have to measure the compression and droop, NOT JUST YOKE TO YOKE. The 78 has 12-14 inches of wheel travel so you may have to cut the rear of the front fender a little bit. It drives strait as an arrow, on and of road. Through whoops it's in an insane difference!

Whatever you're into

Pics?
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  #42  
Old 01-05-2009, 10:55 AM
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Quote:
Originally Posted by fulsizjeep
Well, thanks to this exercise, I realized that drive shaft is too long. I did not notice until I resized the picture. We have not put this one through too much difficult terrain but had never heard or felt it bottom out. Something else to change when the QT & adapter get changed out this spring. We have some rocks here I can exercise it on and see how much travel there is to the rear. The drive shaft was new in 2003. The C were rotated but I don't know how much.


Yep, now that its pointed out, I see that your knuckles seem to have proper orientation.

I would guess that your pinon has been rotated up 10-15 degrees. If I could access photobucket at work, I would post a pic for you of mine that has been rotated up 12 degrees...

Eitherway, that leaves you with quite the desirable axle there!!
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  #43  
Old 01-05-2009, 02:31 PM
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Quote:
Originally Posted by guishe
It seems that this answers the question of the 30 degrees forward/backwards? ... the shackle is set in the position I mention without weight, whit springs extended; and then with the weight as the springs get a bit compressed. the shackle goes backwards, as you said...
yes... that's what they are doing in the first article that was posted. with no weight the shackle is forward, but with weight it will move back.

look how the toyota guys do it... shackle backwards. if your shackle is forwards it puts a lot more force on the shackle and its mounting point as the spring extends in length. its working against itself.

Al
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  #44  
Old 01-05-2009, 06:09 PM
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So in a fsj do you want them forward or backwards using springs with some arch?
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  #45  
Old 01-05-2009, 08:03 PM
guishe guishe is offline
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Quote:
Originally Posted by 4x4fEvEr
So in a fsj do you want them forward or backwards using springs with some arch?

Install them looking fordward while the rig is lifted (no weight).
They will go backwards when you drop the weight on the floor, but they should still have more "travel" backwards to let the springs extend when under compresion
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  #46  
Old 01-06-2009, 07:02 AM
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30 degrees pointed towards the front bumper
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  #47  
Old 01-08-2009, 04:53 PM
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Quote:
Originally Posted by 4x4fEvEr
30 degrees pointed towards the front bumper
i wouldn't say that is a set rule. it depends on your spring rates and arch to say how much compression (lengthening) the spring will do with full weight on it.

its not an exact science, a buddy of mine did a SAS on his pathfinder, and had to relocate his spring hangers multiple times to get his shackle where he wanted it.

Al
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  #48  
Old 01-10-2009, 06:33 PM
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here's an example of one. forward when it hangs, but it will face rearward after the weight is on it.

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