I have searched for an hour for this information. My Chilton gives the old line "since alignment is out of the realm of the home machanic" I will decide whats out of my realm. I think I found this info before and posted it here, But I cant find it doing a search. I Googled it and find a whole bunch of dead ends. I dont understand, whats the big secret?In any case, I set mine at 1/8" at 30 inches. Which works out to 1/4 degree (toed in) I know this is close. But if any one knows for sure, please post it here. At least when doing a search, this thred will come up in the future.

 

After much searching on another site, I was told that the correct figure is 1/32" toe in. The only problem is I was not given a angle or a length to measure this over. One guy said that he believed that you should measure from the center of the front and back of the front tires. (the differnce being 1/32")

The problem with this (other than it's difficult to measure under the truck) is that would mean that the taller your tire, the less toe in you would have. (You have to think about it for a minute.) Of course no one would put taller tires than stock on a Bronco. LOL

In any case, I've come up with two ways to set the toe. First, get a bar about 2" wide long enough to bridge the wheel lips. Place it horizontally against the wheel. This gives you a straight edge outside the tire bulge the same angle as the wheel. (hopfully your lip is not damaged)

Now you can do one of two things:

1. Get a long straight edge (6 feet or more) and put it against the bar from above with most of it out front of the truck. You do this on both sides. You now have two neerly paralal straight edges to measure. Take two measurements 30" apart (aprox. hight of stock tire) The differnce is your toe in. (unless have toe out or "0" toe) LOL

2. The second way is to get a lazor and place it against the bar pointing out front. Now you can get plywood and place it out front at two locations 30" apart. Again the differnce is the toe.

I did the first method and it was fairly eazy. The only question is do bigger tires require more toe (in)? I would think so.

 

I parked my truck on a dead flat piece of ground, put a small staple into the tread on each front tire, at roughly half the height of the tire, exactly the same height on each side. Then had a helper to measure between the staples when they were at the front of the tires. I rolled the truck backwards until the staples ended up in the center behind the tires, and we measured the distance again. Compare the two measurements, and you get the toe. I couldn't remember the spec for the '78 Bronc, so I set it to 1/16" toe in. It handles really well, with a completely solid feel at highway speeds, so I must have done something right.

 

That sounds like a fairly good way for you because you have a solid axle. For us TTB disavantaged guys, as we back up the tires will try to spred. (If it has some toe in) This causes the springs to colapse slightly and throws our measurements off. Forward has the same problem.

I guess if we drive forward twenty feet or more (so the tires are in "cruze configuration") Then put the staple in the backs of the front tires and roll forward half a rotation.