Re: [Amc-list] South African Rogue

[Matt Haas <mhaas@xxxxxxx>]

When I had the drive shaft shortened in my 68 American for the T-14 
swap, a lot of vibration went away. Of course, the T-96 was completely 
trashed so I'm sure that had something to do with it. If still has a lot 
of vibration but it has 10 year old tires, the front suspension is 
really worn, and the rear axle bearings are shot. Also, my 67 American 
cruises at 70+ mph with no vibration at all. Both the engine and 
transmission have had work but the drive shaft and rear axle are 
original. The thing is anything that turns can cause vibration. Drive 
shaft and tires/wheels are probably the most common but you can have out 
of balance drums and I bet a bent wheel will cause vibration at speed as 
well.

Matt

Wrambler242@xxxxxxxxxxx wrote:
> Oh, they'd do 90. but from what I recall they all had a strange cyclic harmonic vibration to them. I had three Americans and it just seemd that once you got above 60-65 they had this vibration. It didn't rattle your teeth or anything, it was mild, but it was there.
>   Could have been tires, u-joints but I always put it down to the engine itself. Just what I thought at the time. IRRC they were all 196 cars that did this. Now that I think about it I don't see how it could have been the engines as my 63 Classic seemed much smoother, I remember the cast iron motor being smoother running then the aluminum one that wouldn't take the abuse of a 17 year old kid.
>   Doesn't really matter now. That was 30 years ago.
> 
> --
> Mark Price
> Morgantown, WV
> 1969 AMC Rambler, 4.0L, EFI, T-5
> 
>  -------------- Original message ----------------------
> From: Tom Jennings <tomj@xxxxxxx>
>> On Wed, 28 Feb 2007, Wrambler242@xxxxxxxxxxx wrote:
>>
>>> My 69 with good condition leaf springs, stock AMC-15 rear axle, T-5 and a 
>> Pinto driveshaft does not vibrate at all.
>>>  All my original driveline Americans had some vibration that I always put down 
>> to their not being designed to be run at 70mph! [Not that it was even legal to 
>> do so at the time I owned them]
>>
>>
>> Huh?! Even a 1bbl 199 american with slush-o-matic bald tires and
>> 9" drums should do 90, even if it's gotta work to get there, and
>> not vibrate noticably. My Hornet does 90+ easy with no vibration,
>> and my driveshaft is 1" too short. (I know, I'm an idiot.) My
>> disaster of a 59 American with *flathead* 196ci did 80 with the
>> pedal literally on the metal (I was an idiot -- 20 yrs old :-)
>> though it did not like that one bit thank you. Didn't vibrate
>> that I recall, or at least that wasn't a memorable part of the
>> otherwise unpleasant experience.
>>
>> There are no intentionally built-in vibrations reachable through
>> (ab)normal circumstances.

-- 
mhaas@xxxxxxx
Cincinnati, OH
http://www.mattsoldcars.com
1967 Rambler American wagon
1968 Rambler American sedan
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