Bad vibration in 4x4 under acceleration

[2003tv]

Ok guys this is my plan i am going to pull both cv and i am going to take apart the 4x4 disconnect again look it over and make sure i put it back together right and i talked to mark i am going to take out 3'' front lift spacers and put his 2.5'' spacers on to see if it will help with the angle and i am going to look at the front drive shaft so thats the plan for this weekend will keep you updated

Lee

[bartonmd]

You haven't gotten under there and shaken the front drive shaft, yet? It's free and takes 2 minutes...

Mike

[Kuchar09]

Ok guys this is my plan i am going to pull both cv and i am going to take apart the 4x4 disconnect again look it over and make sure i put it back together right and i talked to mark i am going to take out 3'' front lift spacers and put his 2.5'' spacers on to see if it will help with the angle and i am going to look at the front drive shaft so thats the plan for this weekend will keep you updated

Lee

I have marks 2.5" lift and have the problem so I don't think the lift is the issue.
When I first put on my lift I didn't have this issue.
Mine started after getting new CV's and ball joints put in by the dealer.
Since then I've prolly gone through 5 CV's couple outer tie rods and put new grease in the quick disconnect. I've looked over things multiple times not finding anything. I'd look again but its gonna be single digits here for the next week or 2 so not a whole lot I can do.

[Opeth]

Ok well I tried to get a video of what I think the issue is. I jacked the truck up by the lower control arm to keep my ride height the same, if you watch the center shaft up towards the upper tripod you can see it move up and down slightly.

My hypothesis is still too severe of a driveline angle, that little bit of slop that has formed with the addition of power being applied it causing the vibrations. I went down a semi smooth dirt road and vibrations are still present. I have marks 3" kit.

[navigator]

any idea what that noise is?

[DirtyBacon04]

looks like that cv shaft is warped... Is that clunking sound just you rolling the tire?

[Opeth]

That noise is just me pushing on the tire, other wise there are no odd noises from the cv joints....I do have a humming/growling noise present 20-30mph in 2hi but figured it was the resonance of my mud tires and I have new wheel bearings which didn't change the sound either.

Once I get some spare cash flowing again after this career change I just did I'm going to tear everything apart and dig deeper into this, also see if a reman set of cv's does anything for me. Since this doesn't inhibit my daily driving its on the back buner till then.

Also looking into cost of custom high angle cv shafts, or having someone fabricate Porsche 930 cv flanges with our input spline shaft mounted to it and me assembling the rest of it.

The Porsche 930 joint...



930 flange adapter...



I don't think it would be too expensive if I can source everything myself.

[2003tv]

Ok I was doing some playing in the snow today if i put it i 4x4 at about 45 50 it does not get the vibration so now what to look at let me know what you guys think


Lee

[Conner299]

I'm hoping that was 4HI. LOL. Just for snits and figgles I put mine in 4lo the other day and got up to about 23 going around the block. I have Mark's 3", new wheel bearings, original CV's, and haven't touched my disconnect. No vibration. Little bit of a whine, but that's it. My best guess is over or under greased and/or bad bearings on the disconnect. Or something in the front diff or transfer. Sorry I couldn't be of more help.

[Regulator1175]

I think i am going to take it to my trans. shop and see what he says because i dont know what to do with it i do have marks 3'' suspension lift kit and 3" body lift do you guys think sears is a good place to get a alignment

Lee

Find a Firestone shop in your area and head there. Invest in the lifetime warranty, it will save you a lot of money in the long run.

[2003tv]

Ok also found out today going 20 30 mph trying to put it in to a4wd the light will flash then i will get service 4wd is that in the Disconnect‏ or something else let me know

[dvanbramer88]

Ok also found out today going 20 30 mph trying to put it in to a4wd the light will flash then i will get service 4wd is that in the Disconnect‏ or something else let me know

http://www.offroadtb.com/articles/tech- ... wd-system/

Use the flow chart. You tell us.

[fishsticks]

Relevant.

[Conner299]

Ok also found out today going 20 30 mph trying to put it in to a4wd the light will flash then i will get service 4wd is that in the Disconnect‏ or something else let me know

After a lot of reading on this site, I have determined to never use the a4wd. I know others can back me up on this.

[DirtyBacon04]

Ok also found out today going 20 30 mph trying to put it in to a4wd the light will flash then i will get service 4wd is that in the Disconnect‏ or something else let me know

After a lot of reading on this site, I have determined to never use the a4wd. I know others can back me up on this.

And to fishsticks comment... I have this to say...

[2003tv]

OK OK I get guys thanks for the flow chart that will be a big help

[dvanbramer88]

OK OK I get guys thanks for the flow chart that will be a big help

Let us know what you find. Than I'm sure we can point you towards a thread or two covering what repairs you need and how to do them yourself.

[The Roadie]

Ok also found out today going 20 30 mph trying to put it in to a4wd the light will flash then i will get service 4wd is that in the Disconnect‏ or something else let me know

If the flowchart doesn't point to one root cause, the behavior in the OTHER mode transitions may have more clues. And the behavior after a fuse-pull reset.

[2003tv]

I can try that to what fuse would i pull for that or is there a thread i can go to

[The Roadie]

viewtopic.php?f=26&t=3126 and many others. Good luck!