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Early Nose Cone/Late Trans
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Clatter
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PostPosted: Mon Apr 05, 2021 1:12 pm    Post subject: Early Nose Cone/Late Trans Reply with quote

Couple of years later... Razz
Got a chance to open this one up.
Didn't drive it much.

A late shift-rib SSC with an early nose cone just slapped on.
The plastic cage was chewed up,
But it looks like i caught it in time?

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This trans shifted perfectly and was super quiet.
Think it's OK to run?
The main-shaft race moves about .020 in the gear carrier..
Is that a deal breaker? Rebuild time?
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Would the plate dealie give me a shot at running the thing?
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It says you have to machine the nose cone?
Is this also needed when running an early cone on a later trans?
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Seems like you'd get your clearance by just gluing it on,
The bearing would be supported,
And Bob's your uncle, right?
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Nose cone is pre-clearanced! Very Happy
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Anyhow,
Wondering how the trans masters would approach this situation..

Thanks for your time and wisdom,
Steve
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PostPosted: Mon Apr 05, 2021 5:12 pm    Post subject: Re: Early Nose Cone/Late Trans Reply with quote

Could you run it for a while with the bearing not having a precise fit in the carrier? Sure. Will you think about how long itís going to last every time you drive the car? Yes.

Itís like having a flywheel bearing loose in an engine. Will the engine run? Sure. Are you creating more damage that could be repaired before it gets too bad? Yes.

I personally would repair it. If itís been moving for a while, which it looks like it has, there are other things worn in the trans that more than likely need attention.

If you simply can get a rebuild presently, the best case scenario would be to use the bearing plate, and resurface the nosecone to remove the wear mark from the moving bearing. The plastic cage in the mainshaft bearing isnít damaged to the point itís going to fail, and the thickness of the bearing plate should be enough that the nosecone wonít hit it after being resurfaced.
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TinCanFab
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PostPosted: Tue Apr 06, 2021 9:37 am    Post subject: Re: Early Nose Cone/Late Trans Reply with quote

Did you have the nose cone machined 0.040"? My local machine shop hosed me on the cost of doing mine, I should've gotten a quote first.
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Ohio Tom
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PostPosted: Tue Apr 06, 2021 12:01 pm    Post subject: Re: Early Nose Cone/Late Trans Reply with quote

The plate will help and likely make you good for a while. It will eventually spin in the bore and wallow it out real bad.

If the bearing is loose in the housing, it will only get worse.
if it still has some tigthness to it, then the plate is actually a good fix. It will pin the bearing in it's place.

That nose cone is hammered. A few minutes on a belt sander will fix that issue. I do it to 100% of the nose cones I re-use.
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PostPosted: Tue Apr 06, 2021 3:19 pm    Post subject: Re: Early Nose Cone/Late Trans Reply with quote

Ohio Tom wrote:
That nose cone is hammered. A few minutes on a belt sander will fix that issue. I do it to 100% of the nose cones I re-use.


^^^^this^^^^

While itís nice to clamp it down, and face it in a mill, some carefully timed rotations on a belt sander is all Iíve ever done. Measure the thickness for reference, but I would bet youíll need at least .020 to get the bearing wear mark out.

FYI, if taking the belt sander route, donít let the Magnesium dust/fluff build up in the nose cone....
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