driveshaft yoke

[cvicky]

proper drive shaft length
it appears less than 1/4 of yoke is in back of trans one inch on splines
lots of up and down play but doesn't leak

[40cpe]

Some engines have been installed with motor mounts reversed. It locates the engine 2" froward from the correct position.

[Daves55Sedan]

Originally Posted by 40cpe

Some engines have been installed with motor mounts reversed. It locates the engine 2" forward from the correct position.

I'd like to see how they got the engine front steady rest and transmission crossmember mount on.
I believe there is not more than 1" overall in the adjustments for the engine steady rest.
It seems like 2" forward would push your fan-blade into the radiator. If you took out the factory spacer between water pump pulley and fan blade, you only subtract less than one inch.
The Y-block in my '55 is all stock with original fan blade and spacer. You can barely stick an index finger between fan-blade and radiator.

Anyway, if the alcove for the mounting bolts on your side motor mounts are facing forward, they are installed backward. The bolts should be installed from the backside.
If so, could be that somebody has got a shorter driveshaft than the original, so the front yoke doesn't engage with trans output shaft as far as it should.

[KULTULZ]

Originally Posted by cvicky

proper drive shaft length
it appears less than 1/4 of yoke is in back of trans one inch on splines
lots of up and down play but doesn't leak

very dangerous ...

[cvicky]

Mr driveshaft will modify my shaft
he says the slip yoke only needs enough play to get rear U joint in.
1/2 - 1"

[55blacktie]

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There has to be enough play to allow for rear axle movement.

[KULTULZ]

Originally Posted by cvicky

Mr driveshaft will modify my shaft
he says the slip yoke only needs enough play to get rear U joint in.
1/2 - 1"

Originally Posted by 55blacktie

There has to be enough play to allow for rear axle movement.

Correct. Are you viewing the slip yoke with the car jacked up and the rear hanging? The slip yoke (with correct ride height) should go into the tail-shaft a little over the half length of the yoke.

The yoke slides in and out as the rear suspension contracts/expands.

It's in the SHOP MANUAL.

[cvicky]

yes measured with rear axle on stands