Just another idea. Bent axle component?


Justin M wrote:
> Not the rear driveshaft, either.
>
> Wow. Uh...
>
> So...
>
> - Had three different places rebalance the wheels/tires
> - Replaced passenger side wheel bearings
> - Replaced passenger side u-joint
> - Replaced passenger side ball-joints
> - Replaced both front brake rotors
> - Replaced trackbar
> - Checked and double checked all bolts on the front end and rear
> - Checked and double checked tie-rod
> - Pulled and checked steering stabilizer, it's still solid
> - Disconnected front driveshaft
> - Disconnected rear driveshaft -- so it's not a driveshaft or u-joint
>
> I'm completely out of ideas now... :)
>
>
> Justin M wrote:
> > nope. no difference on the front drive shaft.
> >
> > rear drive shaft is next. sheesh.
> >
> >
> > > I'm going to try disconnecting the front drive shaft and see if that
> > > makes a difference.

 

Just another idea. Bent axle component?


Justin M wrote:
> Not the rear driveshaft, either.
>
> Wow. Uh...
>
> So...
>
> - Had three different places rebalance the wheels/tires
> - Replaced passenger side wheel bearings
> - Replaced passenger side u-joint
> - Replaced passenger side ball-joints
> - Replaced both front brake rotors
> - Replaced trackbar
> - Checked and double checked all bolts on the front end and rear
> - Checked and double checked tie-rod
> - Pulled and checked steering stabilizer, it's still solid
> - Disconnected front driveshaft
> - Disconnected rear driveshaft -- so it's not a driveshaft or u-joint
>
> I'm completely out of ideas now... :)
>
>
> Justin M wrote:
> > nope. no difference on the front drive shaft.
> >
> > rear drive shaft is next. sheesh.
> >
> >
> > > I'm going to try disconnecting the front drive shaft and see if that
> > > makes a difference.

 

Just another idea. Bent axle component?


Justin M wrote:
> Not the rear driveshaft, either.
>
> Wow. Uh...
>
> So...
>
> - Had three different places rebalance the wheels/tires
> - Replaced passenger side wheel bearings
> - Replaced passenger side u-joint
> - Replaced passenger side ball-joints
> - Replaced both front brake rotors
> - Replaced trackbar
> - Checked and double checked all bolts on the front end and rear
> - Checked and double checked tie-rod
> - Pulled and checked steering stabilizer, it's still solid
> - Disconnected front driveshaft
> - Disconnected rear driveshaft -- so it's not a driveshaft or u-joint
>
> I'm completely out of ideas now... :)
>
>
> Justin M wrote:
> > nope. no difference on the front drive shaft.
> >
> > rear drive shaft is next. sheesh.
> >
> >
> > > I'm going to try disconnecting the front drive shaft and see if that
> > > makes a difference.

 

Years ago, we had a vehicle with the same problem, I was managing an
alignment shop at the time, and we sold the customer his tires, did
the balance, and alignment on the truck.
We ended up taking 4 tires and rims off of another truck and test
driving the truck, it stopped vibrating. What the mechanic had to do
was (oddly) brake the bead on the tire, rotate the tire 180 degrees on
the rim and reinflate/ rebalance. The tires and wheels were in balance
before doing this. ANyway it fixed the problem.
I dont know if you have the same problem, but figured I'd
bring it up.

good luck.

On 8 Nov 2006 18:43:40 -0800, "Justin M" <xtexatl@gmail.com> wrote:

>Not the rear driveshaft, either.
>
>Wow. Uh...
>
>So...
>
>- Had three different places rebalance the wheels/tires
>- Replaced passenger side wheel bearings
>- Replaced passenger side u-joint
>- Replaced passenger side ball-joints
>- Replaced both front brake rotors
>- Replaced trackbar
>- Checked and double checked all bolts on the front end and rear
>- Checked and double checked tie-rod
>- Pulled and checked steering stabilizer, it's still solid
>- Disconnected front driveshaft
>- Disconnected rear driveshaft -- so it's not a driveshaft or u-joint
>
>I'm completely out of ideas now... :)
>
>
>Justin M wrote:
>> nope. no difference on the front drive shaft.
>>
>> rear drive shaft is next. sheesh.
>>
>>
>> > I'm going to try disconnecting the front drive shaft and see if that
>> > makes a difference.

 

Years ago, we had a vehicle with the same problem, I was managing an
alignment shop at the time, and we sold the customer his tires, did
the balance, and alignment on the truck.
We ended up taking 4 tires and rims off of another truck and test
driving the truck, it stopped vibrating. What the mechanic had to do
was (oddly) brake the bead on the tire, rotate the tire 180 degrees on
the rim and reinflate/ rebalance. The tires and wheels were in balance
before doing this. ANyway it fixed the problem.
I dont know if you have the same problem, but figured I'd
bring it up.

good luck.

On 8 Nov 2006 18:43:40 -0800, "Justin M" <xtexatl@gmail.com> wrote:

>Not the rear driveshaft, either.
>
>Wow. Uh...
>
>So...
>
>- Had three different places rebalance the wheels/tires
>- Replaced passenger side wheel bearings
>- Replaced passenger side u-joint
>- Replaced passenger side ball-joints
>- Replaced both front brake rotors
>- Replaced trackbar
>- Checked and double checked all bolts on the front end and rear
>- Checked and double checked tie-rod
>- Pulled and checked steering stabilizer, it's still solid
>- Disconnected front driveshaft
>- Disconnected rear driveshaft -- so it's not a driveshaft or u-joint
>
>I'm completely out of ideas now... :)
>
>
>Justin M wrote:
>> nope. no difference on the front drive shaft.
>>
>> rear drive shaft is next. sheesh.
>>
>>
>> > I'm going to try disconnecting the front drive shaft and see if that
>> > makes a difference.

 

Years ago, we had a vehicle with the same problem, I was managing an
alignment shop at the time, and we sold the customer his tires, did
the balance, and alignment on the truck.
We ended up taking 4 tires and rims off of another truck and test
driving the truck, it stopped vibrating. What the mechanic had to do
was (oddly) brake the bead on the tire, rotate the tire 180 degrees on
the rim and reinflate/ rebalance. The tires and wheels were in balance
before doing this. ANyway it fixed the problem.
I dont know if you have the same problem, but figured I'd
bring it up.

good luck.

On 8 Nov 2006 18:43:40 -0800, "Justin M" <xtexatl@gmail.com> wrote:

>Not the rear driveshaft, either.
>
>Wow. Uh...
>
>So...
>
>- Had three different places rebalance the wheels/tires
>- Replaced passenger side wheel bearings
>- Replaced passenger side u-joint
>- Replaced passenger side ball-joints
>- Replaced both front brake rotors
>- Replaced trackbar
>- Checked and double checked all bolts on the front end and rear
>- Checked and double checked tie-rod
>- Pulled and checked steering stabilizer, it's still solid
>- Disconnected front driveshaft
>- Disconnected rear driveshaft -- so it's not a driveshaft or u-joint
>
>I'm completely out of ideas now... :)
>
>
>Justin M wrote:
>> nope. no difference on the front drive shaft.
>>
>> rear drive shaft is next. sheesh.
>>
>>
>> > I'm going to try disconnecting the front drive shaft and see if that
>> > makes a difference.

 

I'm almost positive it's not an engine component: this happens even
when both the transmission and transfer case are in neutral and the
engine is running at 600 rpm. The vibration only happens between 65mph
and 70mph -- it smooths out above and below that.

But I'll check this out tomorrow.

Thanks :)
j


DougW wrote:
> Justin M wrote:
> > Not the rear driveshaft, either.
> >
> > Wow. Uh...
> >
> > So...
>
> Have you checked the motor and transmission mounts?
> http://revbeergoggles.com/motormount/
>
> What about the harmonic balancer (lowest pully on engine)
> make sure it's not walking off. Those can make vibrations
> if they start to separate and rotate around the rubber isolator.
>
> --
> DougW

 

I'm almost positive it's not an engine component: this happens even
when both the transmission and transfer case are in neutral and the
engine is running at 600 rpm. The vibration only happens between 65mph
and 70mph -- it smooths out above and below that.

But I'll check this out tomorrow.

Thanks :)
j


DougW wrote:
> Justin M wrote:
> > Not the rear driveshaft, either.
> >
> > Wow. Uh...
> >
> > So...
>
> Have you checked the motor and transmission mounts?
> http://revbeergoggles.com/motormount/
>
> What about the harmonic balancer (lowest pully on engine)
> make sure it's not walking off. Those can make vibrations
> if they start to separate and rotate around the rubber isolator.
>
> --
> DougW

 

I'm almost positive it's not an engine component: this happens even
when both the transmission and transfer case are in neutral and the
engine is running at 600 rpm. The vibration only happens between 65mph
and 70mph -- it smooths out above and below that.

But I'll check this out tomorrow.

Thanks :)
j


DougW wrote:
> Justin M wrote:
> > Not the rear driveshaft, either.
> >
> > Wow. Uh...
> >
> > So...
>
> Have you checked the motor and transmission mounts?
> http://revbeergoggles.com/motormount/
>
> What about the harmonic balancer (lowest pully on engine)
> make sure it's not walking off. Those can make vibrations
> if they start to separate and rotate around the rubber isolator.
>
> --
> DougW

 

I'm starting to think that's the only thing it could be. I've pulled
the front axles, but not the rear (the Dana 44 is new to me). They
look straight to me, and I've put a straight edge on them and there's
no distortion. There are no visible weld spots where a weight would
have been...

Tonight I replaced the rear brake drums. Same thing.

I'll pull the rear axles tomorrow to see if they're okay.

After that, I'm out of options, and I've got to find a Jeep friendly
mechanic in North Atlanta who will look at a lifted Jeep. The dealer's
service department won't even talk to me because of the lift.



nrs wrote:
> Just another idea. Bent axle component?
>
>
> Justin M wrote:
> > Not the rear driveshaft, either.
> >
> > Wow. Uh...
> >
> > So...
> >
> > - Had three different places rebalance the wheels/tires
> > - Replaced passenger side wheel bearings
> > - Replaced passenger side u-joint
> > - Replaced passenger side ball-joints
> > - Replaced both front brake rotors
> > - Replaced trackbar
> > - Checked and double checked all bolts on the front end and rear
> > - Checked and double checked tie-rod
> > - Pulled and checked steering stabilizer, it's still solid
> > - Disconnected front driveshaft
> > - Disconnected rear driveshaft -- so it's not a driveshaft or u-joint
> >
> > I'm completely out of ideas now... :)
> >
> >
> > Justin M wrote:
> > > nope. no difference on the front drive shaft.
> > >
> > > rear drive shaft is next. sheesh.
> > >
> > >
> > > > I'm going to try disconnecting the front drive shaft and see if that
> > > > makes a difference.