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Custom Chassis - Drive Line - Suspension - Wheels and Tires - LOWERING or STANDARD Discuss anything related to Custom Dodge Ram Wheels, Tires, Brakes, Suspension Mods, Chassis Mods and Tuning, Towing options, Driveline, Differentials, Sway Bars, Lowering Springs, Strut Braces, etc.


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  #11  
Old 03-28-2012, 04:22 AM
5500 5500 is offline
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Thanks for the heads up Redrum.
Still concerned though about effects of lowering on rear track bar... decreasing the angle of the bar essentially increases the distance between the mounting points, which means that the axle mount will have force loading it. If its not enough to affect track or suspension height, it will probably cause binding in suspension travel.
As posted in other threads, the solution is relocating the track bar mount lower on the axle. Not sure how to calculate the correct position after lowering though.
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Old 03-28-2012, 04:29 AM
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My only thing with that though, is that when the truck sits lower, it's not all that different from when you have a load in the bed. The track bar would react the same on the 4 link rear suspension. To lower the truck by adding the shorter springs just allows you to ride at that height, as if the truck was essentially hauling or towing. And even when fully bottomed out the track bar doesn't cause binding, while adjusting it I'm sure could help to some degree I'm not 100% certain it has adverse effects on the lowered trucks if it doesn't really cause an issue in tow/haul scenarios... just my .02
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Old 03-28-2012, 04:49 AM
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Good point Indeepwaterblue.
I'm probably going to take some measurements at stock height and weighted down enough to simulate a drop, then make a decision. Will also check the travel arc of the track bar as well. Will post info when I have it.
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Old 03-28-2012, 08:00 AM
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Drove by the dealership this morning, and the 4wds seem fine. The only 2wd on the lot was a r/t and it was fine. Im not sure what is causing the problem but Im taking my truck in tomorrow.
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Old 03-28-2012, 09:09 AM
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Let us know how you make out... I just checked my RAM after reading your post and it seems ok.... Great info.... Thanks for making this thread.......
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Old 03-28-2012, 11:24 AM
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Well, just spoke with corporate. Guesss what, I am the first ram with this problem according to them. FML, I can already tell this is going to be fun.
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Old 03-29-2012, 10:57 PM
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OP, To say that all who lowered are wrong about their roll center is a false assumption.

My truck's roll center was measured prior to lowering. We then measured after lowering and my roll center was off by 3 1/8". We shortened my factory trac bar by making it adjustable and brought the roll center back even. Measured on both side of the rear axle to confirm.

Yours may be off from the factory, but to assume all others are as well is not wise. lol
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Old 03-29-2012, 11:13 PM
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Quote:
Originally Posted by stricnine View Post
OP, To say that all who lowered are wrong about their roll center is a false assumption.

My truck's roll center was measured prior to lowering. We then measured after lowering and my roll center was off by 3 1/8". We shortened my factory trac bar by making it adjustable and brought the roll center back even. Measured on both side of the rear axle to confirm.

Yours may be off from the factory, but to assume all others are as well is not wise. lol

you may be right about my assumption. however, the track bar does not need shortened, it would need to be longer to bring the axle back to center. not wise of you to say that either. lol
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Old 03-29-2012, 11:49 PM
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^that's not correct, if you lower the vehicle the panhard bar would "need" (if you want to say it's "needed") shortened, not elongated.

I understand it may seem a little Fed up or frustrating that the wheels don't line up perfect on each side, but if it's within ~1/2 inch I wouldn't cause a fuss. There is no harm it's just a visual thing, and really not noticeable. Like was mentioned, the suspension does not bind at any point in it's travel, so lowering the truck is not harmful. Yes it would lengthen the life of the 4 link's bushings a little to have an adjustable panhard and have it adjusted perfectly, but it's really not a huge deal, or one to worry about. Especially if you are only dropping say 1" or 2".

Unless it is going to drive you crazy visually, there is no issue. This is the way the suspension is designed, it will "shift" side to side a little (say ~1") throughout it's full travel, it's in the design of the panhard bar. Yes it might seem like a "flaw" but other than a slight visual uncomfort, it is a very superior suspension to just about any other and in every way.

My buddy's camaro has a panhard and when he launches at the track his slicks rub the left fender well but not the right fender well when it squats....same thing, the axle shifts ~1" through travel...
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Old 03-29-2012, 11:57 PM
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It does not need to be shorter. The bar is stationary on the frame on the passenger side, so the shorter the bar the closer the axle is going to be toward the passenger side.
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