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Comments
Thanks for your advice!
Phil
Phil
Phil
Thanks
Phil
2, 5 months ago I had 4 new tires put on. The vibration changed from 52 - 54 to when accelerating at start and again between 55 - 70 MPH.
3, The tire store had all the tires re balanced but the vibration remained. The tire store drove the car and thought that it was the drive shaft.
4, I had the drive shaft totally rebuild and balanced. The vibration at acceleration went away but it still vibrated at 55 - 70 MPH.
5, The mechanic shop re balanced the drive shaft and the vibration was still there.
6, I lifted the differential off the ground onto blocks and ran it in drive up to 80 MPH and there was no vibration at any speed.
7, While on the highway I put my hand on the drivers door and the passenger door and the vibration was much more noticeable on the drivers door. There was no vibration on the steering wheel or my feet.
8, I swapped the left rear tire to the front and the vibration went to the front.
9, The tire store replaced the tire with a new one but it didn't help and the vibration is still in the front.
10, I have a repair shop appointment on Wednesday.
I am confused also.
It is great to have you help me with this puzzle.
Thanks
Phil
2, 5 months ago I had 4 new Uniroyal Tiger Paw tires put on. The vibration changed from 52 - 54 to when accelerating at start and again between 55 - 70 MPH.
3, The tire store had all the tires re balanced but the vibration remained. The tire store drove the car and thought that it was the drive shaft.
4, I had the drive shaft totally rebuild and balanced. The vibration at acceleration went away but it still vibrated at 55 - 70 MPH.
5, The mechanic shop re balanced the drive shaft and the vibration was still there.
6, I lifted the differential off the ground onto blocks and ran it in drive up to 80 MPH and there was no vibration at any speed.
7, While on the highway I put my hand on the drivers door and the passenger door and the vibration was much more noticeable on the drivers door. There was no vibration on the steering wheel or my feet.
8, I swapped the left rear tire to the front and the vibration went to the front.
9, The tire store replaced the tire with a new one but it didn't help and the vibration is still in the front.
10, Today I got my truck back from the mechanic and he balanced and rotated the tires again. The vibration changed from 70 MPH to 60 MPH now and he thinks that it is vibrating from the rear of the truck. His best guess is that it is bad tires. Just to rule it out, if it was the differential and I put the car in neutral at 60 MPH should the vibration go away?
Thanks
Phil
The most common problems I've encountered with differentials is the pinion seal starts leaking grease because of age or the pinion bearing is worn out and it knocks out the seal. The other is the carrier bearings get worn out and the rear end starts howling. In either case you would definitely know it.
Some trucks have limited slip and when they get old the clutch packs get worn out. But in that case, the limited slip quits working and that's pretty much it.
In all the above I haven’t ever came across a vibration problem in the differential unless it was just about to give it up. When the differential is sick it will let you know by noise and leaking grease, if it has grease left in it.
I'm in the middle of replacing a rear wheel seal on mine. On mine you have to drop the inspection cover and remove a horse shoe keeper to pull the axle. It's kind of a throwback to the GM's of the early 50's. It's not that big of a deal but it has gone on long enough that everything is soaked with grease so I'll have to replace the brake shoes too.
I guess you did check things like broken/worn shocks, broken leaf spring, loose spring shackles? Don't give up the ship. Half of being a mechanic is you need patience and the other half is you need to be persistent as a stubborn old weed. Good Luck
I checked all the springs and the shocks and the differential is not making any noise. Since it only vibrates under load do you think a dynamometer would help locate the vibration?
Thanks again, Kindly
Phil
I finally had a chance to bring my S10 to the tire store. they changed all of the tires with Michillan Harmony tires. It may be because of the extra weight of the tires but the vibration has gone away except a little bit when I accelerate at 70 MPH (which is tolerable). But for any other speed it is running great.
I wish I could tell you that it was the tires but I can't say. All I want to do is thank you for helping me get through this nightmare.
I owe you my sanity.
Phil
Another good S10 forum is Yahoo. I sometime pick up some good tips from the guys on it.
Have a nice spring and enjoy the pretty weather.
John
I replaced the drive shaft in my 92 long bed last winter. It was cheaper to replace the cardone joints with regular U-joints. This causes a vibration till I get up to speed. The up side was the shop could build it for about $400. Less and when it's time to replace the u-joints I can do that myself.
Had the Chevy dealer replace 2 bearings in rear end but did not fix problem. Dealer says it might be the ring and pinion($800+ labor). I'm not sure I want to pay that kind of money that might fix the problem.
efficiency is performing . No cat, poor performance, light on. Well who am I to say your light is on.
BTW you can buy a sensor to plug into the 02 sensor and the PCM still thinks there is a cat installed. I would never do it though.