Still Chasing That vibration

[Ridgerat]

Wow GGott good find! Thats getting pretty creative. I'll have to log that one away for future reference. Thanks for sharing.

RR

 

[832]

GGott how did you fix the hub being out of round? Did you replace the hub or just the studs?

 

[dpuckett]

I havent checked with a dial indicator, but the wheel LOOKS straight and true when spinning it in the air.



DP

 

[Ridgerat]

dpuckett, might not hurt to double check it with a dial indicator. I know I wouldnt see . 079" with MY nekid eye.

 

[the whale dog]

I had a vibration on my 98. 5 drove me nuts changed transmission driveshafts and all joints ended up borrowing a set of wheels from another truck problem went away put tires on the other truck problem started in that truck turned out to be a bad rim hope this helps

 

[dpuckett]

Can wheel bearings make a vibration? I have some that are only 6mo old, but look to be 6 years old. I jacked it up to check the runout on the hub and wheel, and it was REALLY noisy when spinning the wheel. Took the hub off, and viola, NASTY looking bearings and races.



-DP

 

[Philip]

Bad bearings can cause a vibration.

 

[PToombs]

Yup, that will do it! I was going to suggest swapping front wheels from side to side at SOP, but Jeremy didn't have a floor jack! We probably would have caught it then. Your lucky it didn't seize on the way home.

We could have used the Loadall! :-laf

 

[Furthur]

Gmc

My 91 2500 dodge Diesel had a vibration, that turned out to be what I

believe was a manufacturing defect. The transmission rear mount would not line up/ The drive train was always in a bind. I didn't know what the problem was until I took it in for a rebuilt transmission, and the mechanic destroyed my rear mount trying to get them to line up. I installed a new set of mounts, and found the problem. I removed the mount plate, and elongated the mount, holes with my welding torch, and then the mounts lined up. The vibration

I have had since I bought the truck was gone. I haven't had to replace any

more motor mounts since I relieved the bind.

 

[dpuckett]

It was the bearings....

I am about as ticked as I have been in a LOOONGGG time. After spending God knows how much money trying everything else, with "Cape's best mechanic" troubleshooting, balancing the driveshaft, balancing and rebalancing the tires, checking everything else, it turned out to be the bearings.



And it gets better... ... .



Turns out there were metal shavings in the hub from when I had the rotors turned, which ate the bearings and races on one side. I'm not sure what happened on the other side, as it got a new rotor at the time I did brakes. Now, I know, I am ultimately responsible for making sure it is all clean inside before I packed the bearings. But, this is the first time I had had to get the rotors turned with the hub on, and I figured since Roger is a "friend," and my girlfriend works there, I'd give him my business instead of some local machine shop (who cant even bore a flywheel for a pilot bearing). As is par for the course, someone got in a hurry and failed to tell me there were shavings that needed cleaned out, or clean the hub out themselves. Turned out to cost me $100 in bearings, races, and seals. I approached him about partial reimbursement, and he says since "he lets me use his shop stuff, I am not losing anything in the long run, and in fact am costing him money. " So, if his profits are so dammed important to him, so be it. As soon as I get my drums back (which I took there 6 mo ago, good thing they are off my bad D70), I am not going by there anymore unless I have some emergency with Christina.



Thanks for all the ideas and suggestions,



Daniel

 

[pepecat]

I hate mishaps like this. It is a lose-lose situation from both perspectives. the bottom line I have taken after being burned over and over again in these situations with shops is DO EVERYTHING MYSELF

 

[PToombs]

I hate mishaps like this. It is a lose-lose situation from both perspectives. the bottom line I have taken after being burned over and over again in these situations with shops is DO EVERYTHING MYSELF

Yup, me too! I just barely trust anybody to work on my truck anymore. When I took the wifes Jeep to a guy to do the transmission, It was tough. I had heard nothing but good about him. transmission still works!

Daniel, feel free to use my garage any time you need it.

 

[dpuckett]

thanks, pete. You got a teleporter handy? You live a little far away for me to just drop by.



DP

 

[JLabossiere]

It's good to see you got it fixed. To bad it was sloppy workmanship that was the cause of the aggravation.



I know how it feels also and all I wanted to do was tear the guy's arm off, beat him with the bloody stump and then think of a way of hurting him.



But there was relief that it was over and the truck runs fine.

 

[PToombs]

Sorry Daniel, my cargo transporter is down right now. Scotty thinks he'll have it running in a week or so. Take off the part you need and I'll beam it over on the small one.

On the garage thing, I think you should go and use his shop all the more. Shows him you're not intimidated. Plus, you can work out your bearing$ worth in his space!

 

[btoscano]

Daniel,



Good job I was going to say (or already have) bearing or spindles in that order.



Brian

 

[dpuckett]

Update:

I finally got around to checking the radial runout (that is with the roll of the tire, anyway, even if I do have my terms mixed up. ) One tire had about 3/16-1/4 inch. I rotated the high spot of the tire to the low spot (valve stem) and it improved it to <1/16".



Better, but could stand improvement. I noticed the shake/ vibration tended to be most pronouned around 1800-2000 RPM, give or take, under light to moderate throttle, but still inconsistent. Could be engine related, and my mounts are on their last legs anyway. Hmmmmm... ...



Got some engine mounts a month ago. Finally put them in last night. I could compress the old mounts in my hand by 1/8" or so. Definitely shot.



Test drove in town and down I-55 for a short distance. Smooth as silk. I varied speeds going down interstate from 65 to 80mph, which was all the faster holiday weekend traffic would allow at that time.



DP