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Followup To
Question -
Hi,
I put my pre mounted winter tires on. Now the truck shakes at very low speeds. I back out of the drive way, take off, and before I get 1 block it starts shaking. Just a little faster and it stops. It only shakes when I take off, not when I slow down thru that same speed.
The people I talk to say it's the balance, but the internet said it shakes above 45 mph if it's the balance. That is why I am asking for your help.
I have a 1966 jeep wagoneer. I have owned it one year, and done all the work on it my self. I have a spare 1966 jeep grand cherokee, the difference is power windows and bucket seats.
Thank you, Susan
Answer -
There are as many causes for this as parts on the car, but since it began when you changed the wheels and tires, we have to suspect that either a wheel or a tire is bad. Since this can be quite dangerous, I think you need to take it to an alignment shop and have them inspect the wheels and tires. There might be a mis-fitted wheel, or a bent wheel, or a tire with a bulge on it. If you don't have ready access to an alignment shop, have someone drive alongside your truck while you drive down the road - and ask them to look for any wheel wobble or tire bounce when you feel the vibration. Make sure all tires are inflated to the right pressure.
Assuming this is a 4 wheel drive vehicle, I'm surprised you need winter tires - you must live in Alaska?
You are aware that some 4 Wheel Drive vehicles require you to take it out of 4 WD on pavement, right?
If the right height of the vehicle has been changed from stock, this is likely one cause of this vibration.
Vibrations are the hardest thing to diagnose - just keep checking all the above and anything else that comes to mind. I doubt very much it is wheel balance, by the way, as acceleration would have no effect on that.
Vibration which occurs only during acceleration is usually caused by an engine mis-fire - are you sure you haven't knocked a spark plug wire loose?
OK< I hope some of this is some help!
Good Luck, I think you're going to need it!
Dick
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Thank you for your fast reply Dick. I guess I left a lot of info out. Yes, I do live in Alaska. I love the deep snow in my jeep because it just laughs at deep snow. Ah, Ha, Ha. Yes it is 4wd, the kind where you have to get out and turn the hubs. I am not using 4wd now, but I used it a lot last winter.
These are the same tires and wheels I used last winter with no problem. We put air in all of them first. The winter studs are larger than the summer tires, I wonder what effect that has, but like I said it worked last winter.
I checked the spark plug wires and all feels good. However I am having some issues with the engine. The muffler fell off and the compression is so bad the truck will not stay running when I take off from a stop. I fixed the muffler and it runs much better now, but I am always messing with the idle and the choke. It takes a long time to warm up.
I guess I don't have a more specific question. I wanted to fill in the details. I will take it to the alignment shop. I may have to give it a tune up too.
Thank you, Susan
AnswerI meant the Alaska comment as a joke!
Since your vibration occurs only on acceleration, I suspect your problem is due to an intermittent engine miss - especially since you're having other driveability problems. Take care of those before you spend any money on the wheels/tires/alignment - I think the fact that the problem got worse when you switched to the winter tirer might be pure coincidence - you could waste a lot of money fixing the wrong thing if you go at it in the wrong order.
Stay warm!
Dick.
