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CrashCade

I need some input. . . Please!

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Hello,

I am experiencing a vibration from the mid to front of my truck when I put it in 4wd HI. I have replaced the front Driveshaft already and used the greasable u-joints. It speeds up as my speed rises, which seems to me like it might be a u-joint, but if it were a u-joint wouldn't it make the vibration all the time, because our front Driveshaft is always turning.

Could it be something in the transfer case? I am just trying to get some input before I go freeze my rear end off trying to fix it. Of course I only found this out when I needed it this morning for the super slick icey roads.

Any input would be greatly appreciated.

Jason

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I would say you should really look at your front driveshaft. You might check your tire pressures to make sure they are all even as well, Ideally measure from the ground to the bottom edge of the rim and make all rims sit at exactly the same height by fine adjusting the air pressure. Then go on.

Step 1: Drive it in 4 HI and note vibration speeds and intensities.

Step 2: Drive in 4LO and see if the vibration is now at a lower speed, or if it is still at the same speed.

IF it is still at the same road speed, then proceed.

Step 3: Leave truck in 4HI so the tcase is still engaged as well as the front axle. Remove front drive shaft and drive again.

A sticky slip yoke or improper front driveline angles can cause this as well.

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I will yank the front Driveshaft and test it.

The vibration speed increases with road speed.

I didn't think to pull the driveshaft to test it. Thanks for that! I will post what I find!

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We have a 3rd gen at work doing the same thing, new ujoints in the front and rear driveline and it still does it. I was thinking maybe one of the front wheel bearings maybe???

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We have a 3rd gen at work doing the same thing, new ujoints in the front and rear driveline and it still does it. I was thinking maybe one of the front wheel bearings maybe???

I had a vibration and squeak going for a while, but it seemed to go away. It seems a little strange that It only occurs in 4wd, because the axle is always turning. But I guess when it is loaded up it makes a difference!

I just have to conjur up the cajones to freeze for 30 minutes to remove my front driveshaft and see if that fixes it our not. My guess is it is probably an axle U-joint!

The crappy thing is that my truck just doesn't have any traction in 2wd. . . Go figure with 37" Nitto Mud Grapplers. . .:nono:

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it is all in your head you need pills

Nice. . . Every now and then I get a little crazy so you might be right. I will just put it in 4hi and do a 30psi boosted launch. That should make it go away!:roll:

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Ahhh the dreaded Dodge Drive line vibration. I know of a couple trucks from an RV board that were never fixed. Their vibration was in 2wd though.

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I don't know who makes your lift, but Skyjacker makes a transfer case re-indexing ring and a seal adapter that is supposed to deal with driveline vibration. It's designed to clock your t-case so the angle is not so steep.

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I don't know who makes your lift, but Skyjacker makes a transfer case re-indexing ring and a seal adapter that is supposed to deal with driveline vibration. It's designed to clock your t-case so the angle is not so steep.

I have been running about 8" of lift and it has been fine for 2 years now. This is a new problem. I am hoping it is not axle ujoints, but it just may be!

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mine does the same thing ( i think), its the front constant velosity joint, the ball in there will wear and cuase the vibration, you can put in 3 new u joints and it wont fix it if the ball is worn. best way to check it is pull the front shaft out and go drive it, id be willin to bet my :2cents it will be gone.

let us know. so many people post there problems but not there fix and over time you end up with people asking the same questions over and over and over like on some of the bigger sites.

Later, AL

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Do the new Dodges use a Central Axle Disconnect system? Wasn't sure if they do or not.

8" of lift and on 27 inch tall Grapplers? Wow, didn't know they made them that small! Must be a sweet looking ride!!:twisted:

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mine does the same thing ( i think), its the front constant velosity joint, the ball in there will wear and cuase the vibration, you can put in 3 new u joints and it wont fix it if the ball is worn. best way to check it is pull the front shaft out and go drive it, id be willin to bet my :2cents it will be gone.

let us know. so many people post there problems but not there fix and over time you end up with people asking the same questions over and over and over like on some of the bigger sites.

Later, AL

I was able to get some time to check the ujoints, they all look great and still seem tight. I will get the Front Driveshaft yanked and see what happens there.

What is a constant velocity joint? Where is it?

I will keep you posted

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unless your problem is in your t-case removeing the front driveline won't tell you anything as you stated it only does it in 4-hi, my guess would be cv ball or a axle joint. I check them with the wheel off the ground rock the wheel while looking at the joint for movement that way there in no pressure on the joint

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No, I am going to head over to powerlabs and see if we can pull the driveshaft in their heated shop, I just really don' have the tools to go about it all. My garage was a nipply 28* this morning....

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Well, I went out for a drive tonight and it seems like the clunk\vibration is only from the front left? Would a bad axle u-joint cause this? I tried 4lo and 4 hi and it does it at the same wheel speed. Meaning it doesn't do it any faster in 4-lo. I am kind of at a loss.

If I yank the front wheel and check for play will I be able to tell that way? I am just not really sure what to start with?

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did you pull the front shaft for that ride?

could be the front axle joint, does it feel like its in 4x4 when turning sharp on pavement?

wheel bearing?

ball joints?

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did you pull the front shaft for that ride?

could be the front axle joint, does it feel like its in 4x4 when turning sharp on pavement?

wheel bearing?

ball joints?

No, I hadn't pulled the driveshaft yet. The only thing that will eliminate is the transfer case correct? I am going to get all my fluids changed and my front DS zerked. Hopefully that will help, but I am doubting it.

Everything seems to work like it is supposed to when it is in 2wd. The front doesn't hope around or anything when turning. and it only makes the noise/vibration under acceleration.

I might run over to powerlabs and see if they can yank my front driveshaft for me really quick. I know, what a sissy huh? I am just not feeling the motivation today.$$$

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The only thing that will eliminate is the transfer case correct?

Say what?:confused: im tellin ya ditch the front shaft and go drive it and i bet its gone, mine is the same way with a 6" lift. do this FIRST before you waste $$$ on fluids.

I know, what a sissy huh?

No comment:poke :lol:

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Alright Al,

I meant the front DS is the only thing that will determine if it is Tcase or Axle.

I am heating the garage right now. . . I came from CA, I had never realyy heard of insulated cover alls before...

I will post back in a few!

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:roll: So, I stopped the procrastinating and pulled my front DS. Al, you are a pretty smart guy, cause the center section of the front u-joint was cooked. I have pictures, but I do not see how to up load them onto this site. . .

Anybody know of a good driveline palce around here?

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