Floating Transmission Main Shaft

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Dan Hatch
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Floating Transmission Main Shaft

Post by Dan Hatch » Sat Jul 06, 2024 3:03 pm

Here is movement of a 2PC floating main shaft.
To allow alignment of 4th main.
IMG_3788.jpeg
Now to the other side.
IMG_3789.jpeg
Adding picture to some you where movement is.
IMG_3791.jpeg
Just thought yous guys would like to see. Dan


ModelTWoods
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Re: Floating Transmission Main Shaft

Post by ModelTWoods » Sat Jul 06, 2024 3:43 pm

Dan, I bought one of your floating main shafts when they were available. At that time, you told me that the purpose of the floating shaft was NOT to correct a misaligned pan, but to help and account for the added weight of an auxillary transmission. If a pan is just slightly out of straightness (not enough to cause a broken crank) wouldn't using a floating main shaft in the transmission, aid in curing the problem of the slight misalignment?


speedytinc
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Re: Floating Transmission Main Shaft

Post by speedytinc » Sat Jul 06, 2024 3:56 pm

The misalignment would have to be "slight." If the diversion is only .025" as Dan shows.
That would equate to a possible misalignment of about .040"? @ the final output.
This floating shaft is not the crutch/savior that some think?
It appears to me that you still have to get/keep your pan alignment real tight.
Does the 2 piece shaft add more difficulty in indicating in a perfect center transmission alignment for 4th main fit?


Topic author
Dan Hatch
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Re: Floating Transmission Main Shaft

Post by Dan Hatch » Sat Jul 06, 2024 4:30 pm

It was never meant to correct a badly bent pan. You still should need to straighten ALL pans. This helps with slight misalignment.
You will never get a pan on perfect alignment.
It will remove the flexing of the crankshaft between the 3th main and 4th main.
I think it would also help with an auxiliary transmission.


Les Schubert
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Re: Floating Transmission Main Shaft

Post by Les Schubert » Sun Jul 07, 2024 6:37 pm

I invented this because the 4th main moves around quite a bit just from normal driving stress and road conditions. With this these loads are not transmitted to the crank.


Original14T
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Re: Floating Transmission Main Shaft

Post by Original14T » Mon Jul 08, 2024 4:59 am

Les Schubert wrote:
Sun Jul 07, 2024 6:37 pm
I invented this because the 4th main moves around quite a bit just from normal driving stress and road conditions. With this these loads are not transmitted to the crank.
How do these float?, I am rebuilding my transmission at the moment and was just clocking up my shaft.


Topic author
Dan Hatch
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Re: Floating Transmission Main Shaft

Post by Dan Hatch » Mon Jul 08, 2024 5:26 am

Here link from old forum about them .
https://www.mtfca.com/phpBB3/viewtopic.php?t=3480


Original14T
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Re: Floating Transmission Main Shaft

Post by Original14T » Mon Jul 08, 2024 5:42 am

Dan Hatch wrote:
Mon Jul 08, 2024 5:26 am
Here link from old forum about them .
https://www.mtfca.com/phpBB3/viewtopic.php?t=3480
Thanks Dan, nicely made item indeed.

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