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Glow Plug Diesel performance, modifications, tuning, and repairs.

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Old 07-02-2017, 03:26 PM   #1
frankenstien
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Default Traction bars of the home built variety

anyone here built their own traction bars? i am in the midst of building a set for my ECSB duramax and was curious what others have come up with, ill post some pics when i get a chance.

did you mount yours under the frame or keep them in a straight line from where they were mounted?
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Old 07-02-2017, 09:46 PM   #2
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Default Re: Traction bars of the home built variety

keep them as horizontal as possible. i ordered a right and left hand thread 2" johnny joints for my buggy. im running 1/4" wall 1" inner diameter tube
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Old 07-02-2017, 11:12 PM   #3
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Default Re: Traction bars of the home built variety

Mine are flat ish, truck has about 2" of lift and dont want to lose too much ground clearance, I have a chromoly he I'm at one end and a bushing at the other, using 2"od 1.5" I'd Dom tubing
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Old 07-04-2017, 02:03 PM   #4
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Default Re: Traction bars of the home built variety

heres some pics of what i have so far...

if i mount it on the outside of the frame i need to make some room for the parking brake cable on the driver side.

anyone know how to get those cable ends out? its a 2005 gmc 2500hd.

also, under frame? which is about 2.5'' off perfectly straight, r out sidethe frame, perfectly straight
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Old 07-04-2017, 11:07 PM   #5
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Default Re: Traction bars of the home built variety

I have always heard the vertical centerlines of spring eyes and traction bars have to be the same to prevent binding. This includes the CL of the axle housing and the other end of the traction bar. In other words, the traction bar has to be the same length as the distance from the front spring eye to the CL of the axle. I hope this makes sense, this was state of the art about the time the wheel was invented. Bushing material will affect this to some degree.
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Old 07-05-2017, 11:39 PM   #6
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Default Re: Traction bars of the home built variety

Makes sense, I left room to drill another hole if I need to. I may put one up higher on the axle mount and get the bar closer to level, it has about a 1-1.5 inch add a leaf lift in the back, it won't be perfect, but close
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Old 07-09-2017, 12:48 PM   #7
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Default Re: Traction bars of the home built variety

got them installed, they are decently angled, but are working pretty good. hauled a couple loads of water(400gal) didn't seem to bind or ride too rough, lose about 2'' of ride height with the water, took it easy with the bumps
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Old 07-13-2017, 05:25 AM   #8
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Default Re: Traction bars of the home built variety

That setup will destroy the leaf bushings on a street driven truck. Been there, done that.
The ones we built were much longer too, went to under the front cab mount on a long bed crew cab truck.
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Old 07-16-2017, 03:17 PM   #9
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Default Re: Traction bars of the home built variety

Quote:
Originally Posted by nate View Post
That setup will destroy the leaf bushings on a street driven truck. Been there, done that.
The ones we built were much longer too, went to under the front cab mount on a long bed crew cab truck.
What is it that destroys the bushings? Any other ideas? Ways to keep it from doing it?

I know there's some give and take on this stuff, but leaf spring bushings are cheaper than having the truck eat a t case and driveline
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Old 07-18-2017, 08:38 AM   #10
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Default Re: Traction bars of the home built variety

It doesn't allow the axle to move fore and aft enough.

It's ok for sled pulling (why we had them) but got removed for the street.
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Old 07-18-2017, 05:33 PM   #11
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Default Re: Traction bars of the home built variety

Quote:
Originally Posted by nate View Post
It doesn't allow the axle to move fore and aft enough.

It's ok for sled pulling (why we had them) but got removed for the street.
Gotcha.

I added mine because since I got my big tune and built trans, when I lay into it you can feel the rear of the truck squat down, it was wrapping the axle pretty good, good enough to ruin the bushing in the t case and make a popping noise at the forward U joint.

After screwing with rebuilding the t case, a whole new drive line, and waiting on parts, and 1100$ later the bars might be the lesser of 2 evils, cause we all know I'm not going to turn the power down hah
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Old 07-19-2017, 09:33 PM   #12
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Default Re: Traction bars of the home built variety

sounds like your pretty set, normally make them as long and flat as possible. You want the bars to follow your axle as it travels. If you really want to make sure its ok, there are calculators for it. You can plug in your numbers and see if it works. Or you could just load a lot of weight on the back and make sure the bars dont bind as you add more weight.
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Old 07-28-2017, 04:44 AM   #13
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Default Re: Traction bars of the home built variety

The best design I've seen is a high and low connection at the axle, and a shackle hanging up at the frame end. This keeps the axle in check, but also allows the suspension to move as it needs to with no binding, which leaves the factory suspension bushings to maintain their service life.




Bushings at the axle end, and a JJ or some other swiveling joint at the frame should allow the suspension full movement and only stop axle wrap.
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Old 12-17-2017, 05:34 PM   #14
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Default Re: Traction bars of the home built variety

well, this happened in early october, towed a parts truck home from delta, got home and found this, one on each side, back to the drawing board
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Old 12-18-2017, 07:15 AM   #15
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Default Re: Traction bars of the home built variety

aww crap
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Old 12-18-2017, 09:34 AM   #16
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Default Re: Traction bars of the home built variety

Right? Those U bits were less than a year old, might try to make some shackles for them to move forwardband back as the suspension moves through its range
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