if I will I??
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Junior User
Joined: Jan 2005
Posts: 95
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From: New Holland
if I will I??
I have a 1992 Ford F150 4x4 302 e4od trans. Now that thats out of the way, it has stock suspension on it now. I have a broken leaf spring on one side so I bought a set with 2.5"of lift. If I install these springs will I need to install a 4 degree wedge between the spring and the axle to keep the driveshaft angles in alignment?? Thanks for any replies as this has got me stumped!!!! Oh and it is an 8.8 rear.
Elder User
Joined: Feb 2005
Posts: 526
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From: Spokane, WA
First, the wording of the header does not make it very clear what you are doing thus you probably are not getting the answers you need.
Now I am more of a lowering guy, but the theory is usually the same. If you change a hanger or shackle, you change the angle of the pinion. This will cause you to need wedges to correct the angle of the pinion to stock.
If you are doing it with the spring only, you should not need to rewedge it...but I dont promise that! It all depends if the mount is dead center in the long spring or not.
Do yourself a favor, go to Sears and buy a magnetic protractor. Once you install your springs remove the driveshaft and put the protractor on the transfer case yoke and get the angle. The put it on the axle yoke and measure. The two angle should be exactly the same (parallel). If they are different, you will need a corresponding wedge to correct it (2 degrees of difference will require a 2 degree wedge).
Hope this helps you.
Kenny
Now I am more of a lowering guy, but the theory is usually the same. If you change a hanger or shackle, you change the angle of the pinion. This will cause you to need wedges to correct the angle of the pinion to stock.
If you are doing it with the spring only, you should not need to rewedge it...but I dont promise that! It all depends if the mount is dead center in the long spring or not.
Do yourself a favor, go to Sears and buy a magnetic protractor. Once you install your springs remove the driveshaft and put the protractor on the transfer case yoke and get the angle. The put it on the axle yoke and measure. The two angle should be exactly the same (parallel). If they are different, you will need a corresponding wedge to correct it (2 degrees of difference will require a 2 degree wedge).
Hope this helps you.
Kenny
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Junior User
Joined: Jan 2005
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From: New Holland
That helps a lot kenny, now my next question is I have a carrier bearing in the middle of my driveshaft. So, will I measure the angle at the back of the carrier versus the angle at the rear??
Elder User
Joined: Feb 2005
Posts: 526
Likes: 1
From: Spokane, WA
It should not matter...the carrier bearing has to be parallel to the output yoke. It is the phasing of u-joints....the 2 joints have to be parallel to work correctly thus the carrier bearing should be in the same plan as the yokes.
Since you are lifting one end, the angle will rear different on the transfer case than with the old springs (1 inch will give you roughly 1 degree of change), but the differential yoke should give you the corresponding change in degrees.
Kenny
Since you are lifting one end, the angle will rear different on the transfer case than with the old springs (1 inch will give you roughly 1 degree of change), but the differential yoke should give you the corresponding change in degrees.
Kenny
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Junior User
Joined: Jan 2005
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From: New Holland
so do you think that I will need to do a transfer case drop, since I will be changing the angle of the rear differential assembly. This is confusing stuff!! Thanks for all your help again.
Elder User
Joined: Feb 2005
Posts: 526
Likes: 1
From: Spokane, WA
Not just no...heck no! Just raise the rear and make sure the yoke faces are parallel to each other. Buy the wedges that will bring your rear end yoke parallel to the carrier bearing/output shaft yoke. You are overthinking the problem.
You can install wedges by just loosening the U bolts...you don't have to take anything apart to install them. Like I said before, just raise it up and measure the yoke angles.
Good Luck!
Kenny
You can install wedges by just loosening the U bolts...you don't have to take anything apart to install them. Like I said before, just raise it up and measure the yoke angles.
Good Luck!
Kenny
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Posting Guru
Joined: Apr 2005
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From: covington wa.
with just a 2.5 lift i would think that you dont need any wedges, I installed a 4" lift on
my truck and didnt need any.
my truck and didnt need any.
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