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  1. 6

    Vibration ONLY at 75 mph

    The car has had two different alignments done on the car, both at different caster/camber adjustments, and I've tried changing caster and camber in both directions while keeping the toe within the given 1/8-1/4-inch range. Still no effect on the condition.
  2. 6

    Vibration ONLY at 75 mph

    I've ran the pinion all the way from down 5-degree's, to up 3-degree's moving in one degree increments and this had zero effect on the vibration. Please read initial post as I stated all of this when I started the thread. But I appreciate the insight.
  3. 6

    Vibration ONLY at 75 mph

    I can't stress reading my entire first post enough, I have changed both front and back tires once already, and have tried two different sets of wheels on the back, and the front with no change. All three times the car got a different tire or wheel install, they were all balanced. But thanks for...
  4. 6

    Vibration ONLY at 75 mph

    Remember the first statement pleeeease, read the entire first post, the vibration is present while coasting WITH the engine off, as in not spinning. But thanks for the idea, if the condition was related to rpm it would change with different gear ratios as the rpm changes, but it has nothing to...
  5. 6

    Vibration ONLY at 75 mph

    Again please Read the entire first post, the car has had two different axle housings. Both A-body 8-3/4 housings, one that had been trued up by a axle shop as I planned to use it in my 66' Strip Dart, even added a drain plug. Thanks anyways for the input.
  6. 6

    Vibration ONLY at 75 mph

    You might be on to something with that... A friend of mine that I work with formally did some pit crewing on a NASCAR winston cup car some years ago, and he came up with the same theory. And what semi-validates that is that with the car loaded with people in the back seat the vibration is...
  7. 6

    which is faster.

    Mostly true, however that saying is like 30-years out of date. The replacement is called "volumetric efficiency".
  8. 6

    67' Barracuda 273 (Camshaft Results at the Track)

    When i was 16-17 years old I had two different 273's in a 66' Dart, at the time I had an automatic and modest gears (and budget) but both engines ran great and took a pounding. Although mine only went low 15's, it was still alot of fun and I plan to build a 273 again in the near future for one...
  9. 6

    Vibration ONLY at 75 mph

    Please read entire post, it only happens around 75mph, and at 80-110mph its dead smooth. The car has had four different drop out third members all with completely different components, and two different axle housings. Plus three different driveshaft; stock ball and trunion, a 7260 equipped stock...
  10. 6

    Vibration ONLY at 75 mph

    Lol, well it is mild by my definition. The car does have issues with pinging above 4500-rpm's in 3rd and 4th gear on pump gas with the high rear axle gears but other than that it is insanely drivable. The vacuum is very high at idle (15-inches of Vacuum @750-rpm) with a nice subtle lopey idle...
  11. 6

    67' Barracuda 273 (Camshaft Results at the Track)

    Great thread, I enjoy seeing people run 273's, and backed behind with a four speed definitely gets my two thumbs up
  12. 6

    Vibration ONLY at 75 mph

    I have and interesting issue with my 65' Dart, 170 two door Sedan daily driver. First of all I am am a new member to Fabo, but I do post on Fbbo once and a great while for the shop I work for. I'm looking for educated answers on my problem, so please read all my post before answering so there...
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