Hi folks,

I know this is a tired subject - and being broke, until April 30th (I get paid once a month! And one of my freelance clients ditched me, so I'm really (!) broke), I haven't been able to put you guys' advice to proper use.

I know my center support bearing is unhappy - it squeeks at different speeds and engine loads, predictably. No vibrations associated with this noise.

My occasional, predictable vibration at highway speeds, when pressing the accelerator firmly, still is mystifying me. I have narrowed it down to happening ONLY when my AW70L has locked up. Pressing the pedal through a good part of its travel, in an attempt to kick down (I know, unlikely to happen at ~60mph), only results in more severe shaking.

The most odd thing about this is that I cannot accelerate when shaking. Would a shaking driveshaft slow you down, or cap your speed? Only when kicking down to 3rd can I accelerate when conditions conspire to create this vibration - or, when engine load decreases, normal slow acceleration can resume. It's like I have my horsepower capped. But only in 4th, lockup gear.

This makes me think it's an ignition, fuel delivery, or transmission (yikes!) issue.

Ack!

Ari

Reading the transmission FAQ, for the 12th time, I happened over the section about governor pressure and lockup, with a failed tailshaft bushing component. Well, a tailshaft bushing's cheap and I have some ramps, so... we'll see if that fixes it. It really has seemed to be in the transmission, so that would make sense.

Ari

You can spot a failed tailshaft bushing easy, put it on jackstands and run it up to where it vibrates, you'll see it clear as day.
My tailshaft showed up on deceleration.
Very cheap fix, but its beech removing the old gasket.
Be sure to apply sealant to bolts or it will leak tranny fluid.

Should I plan on taking it to a shop to have the parts pressed apart/together?

Ari