vibration between 80km/h - 85km/h

[pr0n]

my vp has a vibration between 80 - 85 km/h but its only when when 4th gear engages it starts, the gear box is fine fluid is not burnt, its a nice redish, fluid level is fine. after you pass that speed the vibration stops, so normally when it starts i bump it back to the white D then when the revs hit 2000 i put it in the blue D and the revs drop somewhere between 1600 - 1800 rpm at 100km/h and cruises along nicely anyone have any ideas?

[camstatic]

I've heard that the vibration is something to do with the torque converter, can't remember what exactly though. Look it up on google.
I know a few people who own cars that do this, but it's never really resulted in failure.

[pr0n]

im not really worried about it atm because i got a car new car to do up, but i was just wondering if anyone else has had the problem, im thinking the car has a really really good gearbox because it doesn't matter how hard you up it , it always changes verry smoothly because you cant feel it change gears but if you listen you just hear the engine noise drop, its a hell of a lot smoother than my mates stock vu ute with only 100,000km on it and mine has at least 280,000km on it, not actually sure as its a different dash in because when i pulled it out it has VN V6 written on top

[89berlina]

my vp has a vibration between 80 - 85 km/h but its only when when 4th gear engages it starts, the gear box is fine fluid is not burnt, its a nice redish, fluid level is fine. after you pass that speed the vibration stops, so normally when it starts i bump it back to the white D then when the revs hit 2000 i put it in the blue D and the revs drop somewhere between 1600 - 1800 rpm at 100km/h and cruises along nicely anyone have any ideas?

Had the same problem. Also pointed to the gearbox as the problem but ended up being a blocked injector which meant I was running on 5 cylinders. Cleaned the injector out and the vibrations stoped. I think when you loose a cylinder you put the engine out of balance? Correct me if Im wrong

[camstatic]

It can feel out of balance, yep. Although technically, the engine itself is still balanced.