Had the same problem with my 79 B. First time it was the Rostyles which
were warped. The second time, it was not knowing how to balance the
replica minilites (stick-on weights on the outside and standard clip on
weights on the inside to clear tie rod end). The most recent was a couple
of weeks ago....two new front tires and I was back to the shakes. Four
attempts to balance didn't do the job but on last attempt, we took the tire
off and noticed the belt joint inside the tire was not holding. It was
split and as the speed increased, the tire went slightly out of round...no
way to balance that! Maybe the tire is the problem. My tire man said he
had only seen this problem three times in the past ten years.
At 08:11 AM 4/16/99 -0700, Eric Zambori wrote:
>I'm experiencing similar symtoms but I only notice mine through the
>steering wheel at speeds greater than 60 MPH. I also rebuilt the entire
>front suspension and had the alignment reset and have new minilite
>replica wheels but old tires that were new 8 years ago.
>I was wondering if tires that ran for 15,000 miles on old wobbly Rostyle
>wheels could have developed a wear partern that produces a shake when
>mounted on new straight and true wheels. When balanced, a couple of
>these tires required 4 oz. or more of wheel weights when mounted on the
>Rostyles but only 1 oz or less when mounted on the new minilite
>replicas. When I had the tires changed over, I didn't actually see the
>mechanic do the balancing and I'm wondering if they were actually spin
>balanced or bubble balanced. I'll probably pay to have it done again at
>a more reputable shop.
>My second thought was the spring loaded damper in the steering rack. I
>had 3 .010" shims under the cover of mine and I removed 1 as an
>experiment but didn't notice a lot of difference. I may experiment
>again and remove 1 more shim and see what happens. When I have it
>appart, I'll remove the damper pad to see if it's worn.
>
>Eric Zambori
>
>
>
>Jason Dutt wrote:
>>
>> Hello, denziens of the list. Recently we saw a thread regarding a car with
>> the shakes. My symptoms are a bit different, so I thought I'd seek further
>> insight.
>>
>> Before I get in to the problem, let me create a scenario. The front and
>> rear suspension on my 72 MGB have been completely rebuilt using a SPAX
>> conversion on both ends. I have new Minilite Repro wheels with new tires
>> that have been recently balanced on the dyno thingy the tire place uses.
>> When the following symptoms first came up, I took the car back to the
>> specialist who did all the aforementioned work. After checking for any
>> goof-ups, and finding none, he suspected the drive shaft. Indeed, the
>> bushings in the universal joint were shot, so he replaced them. This
>> improved the situation, but the symptoms do still persist.
>>
>> So, with all that said, here's what's up. At about 60-65 MPH, and
>> intermittent shake will appear, usually in the steering wheel. This shake
>> will get worse as I accelerate, up to 75-80 MPH. Past 80 MPH, the shake
all
>> but disappears, but I'm guessing it's just because the harmonics are
just so
>> fast that I can't distinguish them anymore. Here's the weird part: The
>> shake will move from the front to the rear of the car, then back again. In
>> other words, it's not always in the front, or always in the back. It
>> migrates. Sometimes, it doesn't shake at all.
>>
>> If you need any further info, please let me know, but I think this is all
>> that's pertinent.
>>
>> Thanks in advance,
>>
>> =J=
>
>
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