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timmbuck2
05-13-2008, 11:31 AM
My 80 has been acting a little strange the last week or 2. Before Moab the truck was sideswiped and I had to replace the steering box. After a quick alignment, she was driving great. Added a 2.5" lift 2 days before Moab, the drive out was perfect, 90+MPH with no issues on I70. Drove trails for a week, everything seemed fine, late in the week I noticed the alignement was off, the steering wheel is pointed slightly to the right when the wheels are pointed straight ahead. I will take it back to Bear this week. Everything still tracks good though. Get some high pitched squealing and scraping, probably front brake pads, will check those this weekend. Now I notice a vibration or noise, especially around 30-40 MPH. Seems to increase when I give it gas, but if I let off the gas is goes away, and if I put it in neutral and give it gas, I don't hear it at all, so I don't think it is engine related. Driveshaft maybe?? The drive home from Moab was fine. Sometimes there is a slight hesitation from a dead stop...and at a stop light it sometimes feels like the engine has a slight miss every once in awhile. Just changed the oil before Moab, will replace spark plugs and air filter this weekend. Any ideas on the vibration?? Thanks 80 experts. :) :beer::bowdown::beer::bowdown:

T

Nay
05-13-2008, 11:47 AM
I'd recheck that all of your bolts are tight since you replaced control arms. Get under and take a good look that nothing is bent or loose. I'd do all of that before I started replacing anything.

RockRunner
05-13-2008, 12:19 PM
Your vibration noise may be coming from your drive shafts, actually your U joints or Cardin. i had some bad squealing and vibration coming from my truck and once I checked the U joints I found one ready to blow up.

The other stuff i would contribute to loose bolts, Like Nay said check them all and have a new alignment done but before that check your drive shafts.

Uncle Ben
05-13-2008, 12:26 PM
Your vibration noise may be coming from your drive shafts, actually your U joints or Cardin. i had some bad squealing and vibration coming from my truck and once I checked the U joints I found one ready to blow up.

The other stuff i would contribute to loose bolts, Like Nay said check them all and have a new alignment done but before that check your drive shafts.

I would check the knuckle bearing flanges! Definitely sounds like something has loosened!

Romer
05-13-2008, 12:48 PM
Those flanges loosen up on a lot of folks.

I didn't think you made it to Moab, never saw you there.

timmbuck2
05-13-2008, 12:52 PM
Those flanges loosen up on a lot of folks.

I didn't think you made it to Moab, never saw you there.

I was there from Sunday to Sunday. :) Camped several nights in Bride Canyon (take a left before you hit gooney bird rock on gemini bridges road) then hoteled it. Needed some time away from people, had a few things going on. Did make it to Neil and Kim's run of Metal Masher. Ended up running Fins a couple of hourse behind you on Saturday, heard you on the CB and passed the group when you were hiking down to something. Sorry I was unavailable to help out, had some stuff to take care of.

T

corsair23
05-13-2008, 01:24 PM
Sometimes there is a slight hesitation from a dead stop...and at a stop light it sometimes feels like the engine has a slight miss every once in awhile. Just changed the oil before Moab, will replace spark plugs and air filter this weekend.

On these issues, from what I have read, you may want to take off and inspect the air intake tube for cracks...Especially in the "accordian" area of the tube. While you're cleaning all of the wonderful red Moab dust out of the air filter you can inspect the tube :)

I have the "stumble" at idle which I'm hoping between a good tune up and the MAF housing and sensor it will finally go away. It just annoys the $%^& out of me :rolleyes:

Kipper
05-13-2008, 01:38 PM
not sure what happened when it was sideswiped, but if the steering box had to be replaced, definitely check wheel bearings too. if they are gonna go, it's almost always after a hard wheeling trip.

Red_Chili
05-13-2008, 01:42 PM
Put a wrench on everything. Then just roll under there with your favorite frosty brew or sumthin', and let your eyes gaze at EVERYthing. You'd be surprised what you see.

Grab everything and look for any play, etc. etc.

timmbuck2
05-14-2008, 09:49 AM
rolled under there yesterday, did not see anything obvious. No loose bolts, bent anything, etc. Lubed up the driveshafts, the U joints looked and felt ok, but I am not an expert. The vibration is mainly there from 30-45 MPH and the worst at 40, and only under power. I was going up a hill yesterday under relatively heavy throttle, and at 40 the vibration was bad. Let up on the gas and immediately the vibration went away...

Red_Chili
05-14-2008, 10:13 AM
Driveshaft.

Romer
05-14-2008, 10:24 AM
Sounds like to mucch grease in the shaft, not U joints. Common problem

http://forum.ih8mud.com/80-series-tech/80904-drive-shaft-pm-drive-train-troubleshooting-faq.html

post 5 item 4

timmbuck2
05-14-2008, 10:45 AM
Hmm...I have not greased the shafts in months...and only added a little to 1 yesterday...I will go read the link, thanks Romer!

T

Romer
05-14-2008, 10:57 AM
Could still be U joints. Use the full link to troubleshoot including removing shafts to isolate

Nay
05-14-2008, 11:08 AM
I would take your rear driveshaft off and have balance checked. That sounds exactly like a rear driveshaft on an 80 that got nudged out of balance. I have found that enough candy caning of the rear shaft will show up as an increasing vibration at those low speeds.

Rzeppa
05-14-2008, 11:36 AM
Definitely sounds like u-joint based on symptom description. Vibrating at a certain speed under a certain load (or opposite - when coasting) has always been the hallmark of every worn out u-joint I have ever had.

RockRunner
05-14-2008, 11:44 AM
Definitely sounds like u-joint based on symptom description. Vibrating at a certain speed under a certain load (or opposite - when coasting) has always been the hallmark of every worn out u-joint I have ever had.


I agree 100%. take the DS of and inspect the U joint of the truck. On the truck it can still seem to be good if it is just starting to go. Once it is badly worn it will squeal and vibrate at lower speeds too.

Red_Chili
05-14-2008, 12:08 PM
Just pull the driveshaft and have it checked for true, balance, and U-joint condition.
Englewood Driveshaft.

TheBruiser
05-14-2008, 12:41 PM
It may sound funny... But especially since you mention the (possible) misfire at excelleration, and being more pronounced under load, you might just have bad spark or wire. I too have experienced vibration in my drivetrain that to my surprise was fixed by checking/replacing a plug wire. Just a thought.

timmbuck2
06-30-2008, 11:53 AM
Ends up being a bad u-joint on the front driveshaft. Looked fine the first couple of times I checked it out, but the noise has been getting worse so took a look and it is bad. Installed the CDL switch so I could remove the front DS. Took a look here on replacing the u-joint http://forum.ih8mud.com/80-series-tech/72157-how-replace-u-joints-your-80-a.html and not sure when I will have the time nor patience to tackle this. Will order up a new u-joint from Stevinson today, where would be good to replace it? Thanks.

T

Hulk
06-30-2008, 11:56 AM
Englewood Driveshaft off South Broadway could do it for you.

It's not that hard to replace a U-Joint -- I did all four in my garage on a Saturday afternoon.

Romer
06-30-2008, 11:58 AM
Just go to englewood drive shaft on south Broadway and the will rebuild and balance your drive shaft for about $200 including the U Joints. make sure they use Toyota and have them order from Burt asking for the RS club discount or you could go get them at Stevenson and drop them off. Balancing is important as well.

timmbuck2
07-02-2008, 11:31 AM
Should I replace both the spider and the flange yoke? the flange yoke is what is broken...at Stevinson it is about $120 with RS discount to get just 1 spider and flange yoke...

Hulk
07-02-2008, 04:09 PM
Does the spider (Toyota-ese for u-joint) turn freely on all 4 caps? Are the needle bearings all still intact? If it is OK, you could probably re-use it. It is a wear item, so it will eventually need to be replaced, but they do last a long time.