Anyone with a lift + traction bars.....step inside

[Rosspbig]

I just got a Icon 2.5 inch leveling kit installed along with a PMF 5 " rear traction block setup. Everything works great except we are having trouble getting the rear drive-train aligned so that it eliminates a moderate vibration/shudder under initial acceleration. We think it is the carrier bearing and have shimmed it which has helped but not eliminated the problem. Has anyone had this same problem before?? What did you do to fix it?Other ideas?? Any help is appreciated.

[08stroker250]

1 piece drive shaft would take care of it.

[Dasaliac03]

Originally Posted by 08stroker250

1 piece drive shaft would take care of it.

x2!!

[eric.davis]

I did a 1piece but also cv joints will take care of it as well. Thats a more expensive route then getting a 1 piece made up. You can either have a whole new on built which I did or you can get your 2 piece made into a 1 piece

[Rosspbig]

Who makes a good 1 piece driveshaft?

[Ipkyss]

Make sure that the rear pinion angle is correct before you spend the money on the 1 piece shaft. With only the 5" blocks. Thats only 1.5" lift over stock. If the pinion angle is right, the bars "should" hold the pinion perfectly in place. I have a 4" block in the back of mine. I believe I had to drop the carrier bearing about an inch. I don't have any kind of vibrations even running a 310 tune.

I would drop the carrier bearing 0.75-1" to start with. Then set the pinion angle about 2-4 degrees less then the angle of the driveshaft. Which means. If your driveshaft is on a 20 degree angle, Set the pinion at 16-18 degrees.

[Rosspbig]

Originally Posted by Ipkyss

Make sure that the rear pinion angle is correct before you spend the money on the 1 piece shaft. With only the 5" blocks. Thats only 1.5" lift over stock. If the pinion angle is right, the bars "should" hold the pinion perfectly in place. I have a 4" block in the back of mine. I believe I had to drop the carrier bearing about an inch. I don't have any kind of vibrations even running a 310 tune.

I would drop the carrier bearing 0.75-1" to start with. Then set the pinion angle about 2-4 degrees less then the angle of the driveshaft. Which means. If your driveshaft is on a 20 degree angle, Set the pinion at 16-18 degrees.

I may try to take it to a specific 4x4 driveline shop and see if they can get it in line before I get a 1 piece driveshaft made. The shudder is not that bad, but once you notice it, its all you can think about.

[Ipkyss]

Were the traction blocks flat like the stock ones or were they tapered?

[Duffie112]

are one piece drive shafts stronger?

[NotStock]

Hey Ross,
Talked with Vickie some today about the truck and they have a couple more options they are going to try. Although a 1 peice driveshaft will probably fix the problem, there is no reason that it shouldnt be able to be solved without it given the small lift size. As I have told you, Im more than happy to help in any way I can. Feel free to call or have Vickie call me anytime bud...