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post #1 of (permalink) Old 01-03-2005, 08:30 AM Thread Starter
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Suspension Woes

First some truck background. My Bronco has a 6" on it by Superlift. I added the super runner steering up front. I wanted to go with a spring only lift in the back but was informed that Superlift does not have a spring for a 6' lift and only offers springs with blocks. So that is what I went with.

I have had the lift on for about two years when I noticed my left front tire had begun to wear SEVERLY on the outside edge. I was concerned that something was amiss up front, ball joint, bad alignment, perhaps the super runner steering. I got new tires and had the front end aligned. I was told the front was fine but the rear end was in the truck crooked!?!?! And not just a little either. I had noticed the truck driving eratically but passed it off to road conditions etc. Since I was told about the situation, I went home and lowered down the rear end and inspected everything then put it all back together. Everything "seemed" to be alright. Took it for a drive and no change. What could be the cause of the rear end being crooked??? I am at my whits end! Any suggestions????

Thanks in advance for your help
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post #2 of (permalink) Old 01-03-2005, 08:16 PM
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Re: Suspension Woes

Could you take some pictures so i can see exactly what you mean, preferable underneath as well as side and front and back so i (everyone) can get the best knowledge of what you mean.
post #3 of (permalink) Old 01-03-2005, 09:58 PM
**DONOTDELETE**
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Re: Suspension Woes

The problem is probably your front suspension, the TTB set up on the front of these trucks suck and always wears tires crooked. every one of my tires is worn sideways and I have had the truck in the aligment shop 4 times. It is a side affect of lifted ttb set ups with big tires. The ultimate solution is to save for a solid front axle swap...thats were I am heading...
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post #4 of (permalink) Old 01-04-2005, 05:39 PM
 
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Re: Suspension Woes

you could have one of your springs in backwards. i know that sounds crazy but there is a front and back to each spring. you need to measure from the eye of the spring to the center of the spring pack. usually there is a nub or bolt head of some sort. i don't know if it can be done in the truck or if the spring needs to be out and unsprung. i have only done it out. i have encountered this problem a couple of times while working on heavy trucks, strait-job delivery types. not all springs are equeal on both sides. even if it is off less than 1/4 inch that can be a big difference. same could apply to the blocks too i guess, if the set is not centered. the only other thing i can think of is to check you shackles. they could be bent of frozen up or something and not allowing the spring to flex. good luck
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post #5 of (permalink) Old 01-06-2005, 11:02 AM Thread Starter
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Re: Suspension Woes

I checked the springs as you suggested and was reminded that Superlift marks the front of the spring. Unless they were improperly marked, I got em in right. The saga continues. The interesting part is the alignment shop says that the front end is good shape and all the trouble is in the rear. If this keeps up I'll junk it all and og for the Rockwells!! [img]images/graemlins/grin.gif[/img] All I would have to do then would be to convince my wife I need the "upgrade". (like that is going to happen)
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post #6 of (permalink) Old 01-07-2005, 11:06 AM
 
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Re: Suspension Woes

I don't buy that the rear is crooked. TTB is hard to keep alligned and the allignment shop was probably trying to find something to blame it on. Unless you somehow bent the entire frame there isn't anything to be bent. TTB beams on the other hand have been known to bend. But usually only if you have a fully locked front end. I'll be willing to bet that there isn't enough adjustment in the allignment bushing. (I probably am calling it the wrong thing.) Napa and some others sell an adjustable bushing so you can dial it in and reduce the amount of outer tire wear. You will always have some as it is TTB. This is one big reason for solid axle swaps. I'm going to email The Juice and see if he can add some onto this because he has taken TTB to its limits and has made it work for him for a long time. NORM
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post #7 of (permalink) Old 01-07-2005, 12:32 PM
 
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Re: Suspension Woes

Wow, lot's of new little icon's to play with over here. [img]images/graemlins/gituar.gif[/img]

I would be suspicious of the verdict being the rear too, but it's not out of the question. Things you can do yourself to diagnose:

Start with the front. I assume you have all the proper bracketry installed for the 6" lift? Are you running the stock camber bushings, or did you need to get adjustables? Wear on the outside of the tire is usually due excessive + camber (wheels like this \ / )
when viewed from the front. If you have a sears protractor you can get a rough estimate of your camber. If it took you 2 years to notice this, the problem is not severe. Does the truck track straight driving down the highway, or pull?

Jack up that side, pull/push on wheel, on the sides, and top/bottom. Any noticeable loosness? Getting any shimmy while driving? looseness here could be due to worn ball joints, improper wheel bearing preload setting.

How is the tire worn, is it feathered, or?

For the rear, you don't just have to take their word for it by how it might be stamped "front" or "rear" on the spring, I would take a tape measure and physically check distances (both sides) of each spring from the center of eye on front part of spring to the bolt holding the pack together and same for the rear eye. They should be practically exact.

My rear end is out by 1/4" (or so said the alignment machine), but that's not unusal to be off a little. In order for one front tire to wear, I would think you should be able to physically see a problem in the rear. So, look at the position of your tires in the wheelwell, and tape measure this too. I know this won't be real accurate, but anything strange here, i.e. 1 tire sits about a 1/2" or more closer to the front part of a wheelwell? Any wear problems with the rear tires? Rear end sitting level? when you reinstalled the rear, all the pins for the blocks, and the springs lined up ok?

Has any shop actually given you the specs they came up with?
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post #8 of (permalink) Old 01-11-2005, 06:24 PM Thread Starter
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Re: Suspension Woes

Update:
Still need to take some measurements but was under the truck this weekend and the lower leaf springs are cocked and stick out from the others about 1/2 inch. The interesting part here is they are cocked the same amount on both sides. I hope to actually have a day off soon so I can take some measurements. I leave in the dark and come home in the dark! [img]images/graemlins/cussing.gif[/img] I am ready for summer time!!
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