I always have thought I had a problem on ring and pinion adjustment, but....

[Nacho-RT74]

I have had a noise like a turbine noise which is louder when not giving gas than giving gas. I dunno actually how to describe the noise. I dunno f you have heard an industrial Lathe sometime in your life, but sounds like that.

Two nights ago, I was at highway going down a hill in Drive gear, without give gas just letting go the car at 55-60 miles by the tranny keeping the car. Its a very dangerous section of the highway to give gas to the car to go faster, specially with stock old kind brakes so, I preffer to keep the car with tranny and keep the brakes cold. For whatever reason I put the car in Neutral and the noise went away... then put in D back and noise came back

so... it looks something is wrong on Tranny instead ring and pinion adjustment  ?

if so... why appeared when I installed my new 3.55 gears and not before ? at least as far I noticed

Beside that I have had since EVER as far I recall, a HARD vibration when going close to 110 mph or faster what is kinda periodic... something like RRRRRRrrrrrrrrrrRRRRRRRRrrrrrrrrrrrRRRRRRRRRrrrrrrr. Below that speed I can't feel anything, but getting close to 110 miles appears and gets worst as far I try to go faster. Is able even to shake everything on car

Is there a chance both deals have a common problem inside the tranny ?

[b5blue]

Outboard axle wheel bearings maybe? 

[Budnicks]

With the car in neutral there is no load on the coast side of the ring & pinion..., it still could be, too tight/loose on the coast side of the gears {not enough or too much free play}, a carrier &/or pinion bearings, the universals, trans output bushing &/or bearings or even a wheel bearing like mentioned above

[Nacho-RT74]

well, I installed everything new when I changed to 3.55 and SG, and got the noise.

I gave the axle to an expert on axle stuff, and things didn't change much.

the tranny vibration has been there since I have memory, inlcuding when it was the original open and 3.23

[A383Wing]

so...when did the whirring noise show up, before or after the 3.55 gear install?

Bryan

[Nacho-RT74]

right after that... yes, logics dictates its a ring and pinion deal, not tranny, just was thinking out loud.

THIS IS ANNOYING 

trans output bushing &/or bearings

this is why I asked. Both problems could be at this moment related somehow

[A383Wing]

if noise started right after, then it's a ring & pinion lash problem...it will not be the trans or bushings

Bryan