U-Joint Rubbing On Crosmember

[rockhauler]

I have a 2006 mack vision air suspension 40k rear diff. and when I'm going up a steep hill loaded my U-join(in front of front axle) rubbs on the crosmember I tried to move the leveling rod up, even drill a hole to set it higher, change the leveling rod control valve still nothing. But the other day my governor had a little mal function and I was running 150 psi and it quit rubbing until I fix the governor....any idee?

[rhasler]

I have a 2006 mack vision air suspension 40k rear diff. and when I'm going up a steep hill loaded my U-join(in front of front axle) rubbs on the crosmember I tried to move the leveling rod up, even drill a hole to set it higher, change the leveling rod control valve still nothing. But the other day my governor had a little mal function and I was running 150 psi and it quit rubbing until I fix the governor....any idee?

There is a service bulletin from Mack concerning this. It it SB 121-036. The bulletin requires replacement of the crossmember with a new cross member part number 48QL432M10.

[Lmackattack]

I have seen this on a few diffrent trucks. At work we have a 1996 IH that has a crossmember that was cut out with a torch so that the U joints dont rub... this was a factory fix!!!... Only thing I could think of besides replacing the crossmember is to add "stops" on the axel tube/frame so that it cant move that far up. some R models with camelbacks had these "stops". My RS700L has them

[rockhauler]

Right on switching cross member it will be.

Thanks,best