Why am I banging my front drive line on my exhaust

[rookies]

I cant see why I have beat the heck out of my down pipe with my front u-joint? I have a 3 inch lift a 3/4 crossmember drop. Front end part are tight no bent track bar, axle is centered. Any Ideas?

 

[supsa]

More info? Pics maybe? Is it happening off road or on? Full flex or what? I have never had this problem but friends I know have. Motor mounts were bad

 

[rookies]

I did have a broken mount I thount that was Ii replaced it went wheeling last weekend never heard till the upper part of fire break five it happened turning right not a lot of articulation. Ran all of cedar tree and ran both ways on saddle up never hear it.

 

[mojojojo]

a picture is worth a thousand words.....

help us, help you. ha ha

 

[NW-ZJ-SCOTT]

I had this happen when my motor mounts were broken.

 

[Avanteone]

You do realize that the factory pipe is flattened or kinked for clearance at the front driveline next to the oil pan, correct? Or is this new damage?

 

[rookies]

I just checked no broken motor mount I can jack up the right side about a foot and a half and the drive line gets very close to the pipe and yes it is flatten fron the factory and now it is more. I am still trying to figure out how to post pictures

 

[Shane_92-XJ]

pictures and you might also get better answers if you post this on the tech forum

 

[rookies]

Here is a picture from the front looking over the axle with the right front tire jacked up off the ground
http://s784.photobucket.com/albums/yy127/rookies2009/

 

[mojojojo]

Here is a picture from the front looking over the axle with the right front tire jacked up off the ground
http://s784.photobucket.com/albums/yy127/rookies2009/

try measuring from top center of each tire to the inner fender.... should be within a half inch or so. maybe your track bar needs adjusted so it pulls the axle more towards the driver side ?

 

[rookies]

I have check that and the are the same. When I bought the jeep it had a small bracket in the end of the track bar this pushed the axle more to the right which made it worse i took it out and if anything it would need a shorter track bar then stock.

 

[crazycracka]

Strange that this was posted I just found out I have the same problem after I lifted.

Rod, On the christmas tree run I was talking to you about the binding noise when i hit a bump only in 4 wheel drive. Well this is it.

So hopefully we can find a cure short of replacing that area of pipe.

 

[bmfm64]

 

[Avanteone]

That's a really shitty picture, but does it look like the pinion angle is way high to anybody else?

How much lift? Adjustable control arms?

 

[bmfm64]

That's a really shitty picture

kinda what i thought but i figured i'd help him out... and at least get it posted up.

 

[rookies]

pinion angle is 4 degrees and the lift is 3.5"

 

[mojojojo]

hmmm.... maybe you guys are just sitting in that "sweet spot" around 3" of lift where its gonna hit the pipe ? try lifting it another inch ? lol i know it sounds stupid, but...

 

[bcmaxx]

Mine made contact with the pipe when stuffing the lf, it was a combination of poorly adjusted arms and the axle was too far back (further back than stock) I installed drop brackets and corrected my control arm lengths. No more contact

 

[rookies]

I would go for that but what should lower link length be my upper links are stock lowers I think they are adjustable. If I lengthen the lower arms I am going to take pinion angle away

 

[NW-ZJ-SCOTT]

I would go for that but what should lower link length be my upper links are stock lowers I think they are adjustable. If I lengthen the lower arms I am going to take pinion angle away

sorry man, ya lost me?

but i think you were saying the stock lowers are adjustable? no. they are fixed length, and for 3.5" they are too short. that very well could be the problem

My lower control arms are for a 3" lift. (barely longer then stock) and i am at 5" of lift, so my axle is pulled back, I plan to do RC drop brackets after christmas