Traction bars with stick

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Apr 9, 2012 | 09:40 PM

rockcrawler_101

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Traction bars with stick

I have a 01 f250 with a 6 inch lift and when i tow my jeep and trailer i get a bad vibration on take off. I dont have this with light loads so i figured its the pinion kicking up when under load. I was going to build some traction bars going from the frame down to under the axle. They will just be single mounts on both sides. I will be using bushings on both sides sense i dont wheel this truck much and it doesnt flex much. But my real question is with my manual trans will it be more jerky when taking off with the traction bars?

Apr 10, 2012 | 12:58 AM

4inchlovin

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are you sure your pinion angle is where it needs to be? and or you dont need to shim your carrier.

Or perhaps since you are shimmed alot (either carrier or under leafs) when you put alot of load on it it is binding from sagging alot? I would think this is closer to the issue since a simmy on take off tends to be binding on your u-joints or carier. I think you would be better off getting some air bags or the Roadmaster active suspension kit from Clay instead of going through the time of building traction bars.

Either way to answer your question no i dont think it would make take offs more jerky with the traction bars and the zf6

heres a link to the active suspenion

Riffraff Diesel: Roadmaster Active Suspension Kit

Are you all spring lift in the rear? or is it blocks?

Apr 10, 2012 | 01:09 AM

rockcrawler_101

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I do have it shimmed. It used to do it before with no load but got that shimmed out. I run procomp 4 inch leafs with 3 inch blocks. I get no vibration when hauling light loads. That's good to hear about the shutter with the traction bars

Apr 10, 2012 | 01:17 AM

rockcrawler_101

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No real notable sag in the real when towing. Butwill look closer next time

Apr 10, 2012 | 06:31 AM

Crewcab Turbo

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From: Marseilles IL

Quote:

Originally Posted by rockcrawler_101

I have a 4" lift and had the same problem. By shimmed do u mean axle or driveshaft? If you have the 2 piece shaft with the center bearing you need to lower the bearing. I can measure but I think I made an inch spacer to go between the bearing and frame and no vibration at all. With a 6" you may need a little bigger spacer. Shims under the spring did nothing for me as far as the vibration at take off.

Apr 10, 2012 | 12:27 PM

rockcrawler_101

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The shims are under the drive shaft. I put the block that is shimmed to face the other way to push the pinion down. I got the front half of the drive line and the pinion close to the same angle now. It drive great with light loads just big ones get me the vibration.

Apr 10, 2012 | 05:09 PM

jt371

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From: Upstate NY

Does your truck have a CV (double u-joint) on the front end of the rear driveshaft? If so the pinion should be in line with the drive shaft. The double u-joint all ready cancels out the speed change of the u-joint angles. So the rear would be straight to not add any speed change.