Thumping Noise I think it's coming from??

[khass0410]

I think it is coming from my driveshaft as I go faster it gets faster and louder I looked under there to see if it was hitting anything and it's not. Please Help.

 

[jasonmark1993]

Take a side shot of your driveshaft that shows where it comes off the Tcase and the pinion in the same picture if you can.

Since we were talking about the shims something might be in wrong and your DS angle could be off.

 

[khass0410]

Take a side shot of your driveshaft that shows where it comes off the Tcase and the pinion in the same picture if you can.

Since we were talking about the shims something might be in wrong and your DS angle could be off.

Here some pics

 

[khass0410]

and some more

 

[IOPort51]

looks pretty steep to me.

 

[dauntless89]

Holy , that's insane.

I can almost hear your u-joint screaming.

 

[Old Dog]

Try jacking the jeep up and put it in N. so you can rotate the driveshaft by hand, and see if you can feel anything binding.

 

[Torxhead]

Looks like somebody put in some high lift springs without adding shims and lowering the Transfer Case . Nice looking springs with that military wrap also.

 

[khass0410]

So do I need to turn the shims arond? Right now I have the big part towards the shackles and the small part towards the perch. I didn't add any lift and it wasn't making this noise before.

 

[khass0410]

Looks like somebody put in some high lift springs without adding shims and lowering the Transfer Case . Nice looking springs with that military wrap also.

Military wrap? Lol I don't know what I have.

 

[dauntless89]

So do I need to turn the shims arond? Right now I have the big part towards the shackles and the small part towards the perch. I didn't add any lift and it wasn't making this noise before.

You want the pinion in line with the driveshaft as much as possible. It sounds like they're in backwards.

 

[Torxhead]

Military wrap? Lol I don't know what I have.

A military wrap spring is where the second (and sometimes third also) spring is wrapped around the main spring eye so if the main spring breaks (I have seen that), the vehicle is still supported.

 

[khass0410]

You want the pinion in line with the driveshaft as much as possible. It sounds like they're in backwards.

So the easiest way of turning these around might be?

 

[Torxhead]

So do I need to turn the shims arond? Right now I have the big part towards the shackles and the small part towards the perch. I didn't add any lift and it wasn't making this noise before.

Khass0410, it appears that in the last pic sent that the wedge installed between the spring and the axle is indeed installed backwards. The rear axle pinion gear angle should be in line with the driveshaft. If you still get a vibration afterwards it will probably require lowering the Transfer Case also. To do this it should require a kit or a driveshaft with a constant velocity u-joint installed.

 

[khass0410]

I have not drove it yet soooooooo i'm about to but here is the new pics....

Thanks you guys i'm now into 18 hours of working on thsi thing threw out just this weekend :wasted:



YAY!!!!!!!!! it's fixed

 

[dolfan]

your pinion angle is way too steep,you definitly need to turn the shims..your driveshaft should form a generally straight line from the Transfer Case to the differential.that will leave plenty of room for movement during articulation..good luck

 

[Petescj]

That definately looks better. I think you could still use a small Transfer Case drop. Drive it around for awhile and get it up to highway speed.

I have not drove it yet soooooooo i'm about to but here is the new pics....

Thanks you guys i'm now into 18 hours of working on thsi thing threw out just this weekend :wasted:



YAY!!!!!!!!! it's fixed

 

[khass0410]

No noise that I can hear but I'm no mechanic sooo who knows

 

[jasonmark1993]

No mechanic?

You must be close by now.

Youve rewired your jeep and replaced the suspension.

You'll get there.

 

[Old Dog]

With the pinion angle way up like that you really need a double cardan (cv) joint on the shaft.