Vibration at high speeds

[IdahoDoug]

And yes, Idaho Code read the word to the left.....whups!

DougM

 

[nyk438]

Driveshaft bent or weights fell off

I saw a post about the pinion. Has there been any work where the driveshaft had to be removed? If so, the person may have pulled shaft from the yoke and put it back on with the u-joints in phase.

Just some ideas.

HTH,

How do I go about fixing this? Just drop the driveshaft and put it back in..how do i put back in phase?


Also could a young kid whose learning do this job w/o screwing something major up?

 

[IdahoDoug]

NYK,

You are young. You are preoccupied with other stuff. You are missing some very important advice. You are going to get a break for no reason at all other than we're great people.

First off, Phil asked you a key question which you ignored so I'll ask it again on his behalf. Ready? Follow this carefully. When you drive over 50 and it's vibrating does the vibration change when you let off/press on the gas or put it in neutral? If yes - front drive shaft. If no - front tire balance.

So, find this out and get back to us. It's a key piece of information and moving forward without it will result in us wasting your time and money.

Regarding the in/out of phase stuff it's a piece of cake if you have a simple wrench/socket set. We'll get to that after you address the above. My next post for you will be in Idaho Code if you ask another question without answering the ones helpful folks have already asked.

DougM

 

[nyk438]

NYK,

You are young. You are preoccupied with other stuff. You are missing some very important advice. You are going to get a break for no reason at all other than we're great people.

First off, Phil asked you a key question which you ignored so I'll ask it again on his behalf. Ready? Follow this carefully. When you drive over 50 and it's vibrating does the vibration change when you let off/press on the gas or put it in neutral? If yes - front drive shaft. If no - front tire balance.

So, find this out and get back to us. It's a key piece of information and moving forward without it will result in us wasting your time and money.

Regarding the in/out of phase stuff it's a piece of cake if you have a simple wrench/socket set. We'll get to that after you address the above. My next post for you will be in Idaho Code if you ask another question without answering the ones helpful folks have already asked.

DougM

LOL, sorry and pardon me for being young and unpatient.


The vibration changes almost stops when I let off the gas. I had all four tires balanced and it got better as in it wouldn't vibrate when I was off the gas.

Better?




Sorry for the confusion, no idaho code plz

 

[Safado]

Nice Improvement!...

The whole In Phase -- Out of Phase argument I think is kinda weak unless you've recently had your drive lines worked on or re-tubed. Phasing is in reference to the Sleeve Yokes of the Drive Shaft. If you look closely at the picture below, you'll notice that the stock configuration of the 80 has the Sleeve Yokes in the Front DS 90 degrees out of phase and the Rear DS are "In Phase." Crawl under your truck and just verify it as best you can. If they are incorrect, it is an easy enough fix...however, post your findings first.

 

[IdahoDoug]

Now we're making progress. While you're under there with a printout of Safedo's picture, also determine if the grease fittings are all in a line like they're supposed to be. Actually, ones to the right of the grease fitting on the flange yoke and the other's to the left. This will affect balance.

If they actually disassembled the shaft itself, you may have other issues we'l cover later.

So how's it look under there? See any fresh grease around the fittings??

DougM