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Old 08-05-2013, 05:45 PM
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T Bird power rack question

I have a 85 T Bird power steering rack. The pinion shaft is too long. Can it be shortened ?


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Old 08-06-2013, 09:17 AM
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Maybe that shaft is called something else. It's the short splined shaft that connects to the steering column with u-joints.

Is it solid ? Would I hurt the rack and pinion if I shortened it an inch or so ?


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Old 08-06-2013, 02:44 PM
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It won't hurt the rack, but the splines will be gone. How will you connecxt the column?
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Old 08-06-2013, 05:50 PM
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I could just drill a small indention and run a set screw into it.

Thanks !


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Old 08-06-2013, 09:26 PM
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Quote:
Originally Posted by 454 Rattler View Post
I could just drill a small indention and run a set screw into it.

Thanks !


454 RATTLER
Not a good idea. There is upwards of 350 ft lbs of torque applied to that shaft under certain conditions, much more than a set screw can hold. The shaft at that point is only about 5/8" which is too small for a pin. You are going to have to think of another way that will be safe. I would try to do a mechanical connection like a double D
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Old 08-07-2013, 09:13 AM
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Are the set screws ONLY used on the DD and splined shafts ? Are the round bore shafts only attached by welding ?

Thanks for the help.


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Old 08-07-2013, 11:54 AM
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quit teasing us
what build is this too long for?
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Old 08-07-2013, 04:53 PM
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Quote:
Originally Posted by 454 Rattler View Post
Are the set screws ONLY used on the DD and splined shafts ? Are the round bore shafts only attached by welding ?

Thanks for the help.


454 RATTLER
Set screws are used to keep a mechanical connection together, rather than being the connection itself. You might be able to disassemble the rack and have the end recut to a smaller spline , like 9/16 by 36.
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Old 08-08-2013, 08:36 AM
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Originally Posted by enjenjo View Post
Set screws are used to keep a mechanical connection together, rather than being the connection itself. You might be able to disassemble the rack and have the end recut to a smaller spline , like 9/16 by 36.
Maybe you misunderstood what I want to do.
I want to SHORTEN the pinion shaft Not reduce the diameter.

This build is a 1936 Ford Sedan 350 with an original Mustang II crossmember. There is no room between the motor mount and universal joint.

The question is....Can I shorten the pinion shaft?

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Old 08-08-2013, 10:16 AM
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Quote:
Originally Posted by 454 Rattler View Post
Maybe you misunderstood what I want to do.
I want to SHORTEN the pinion shaft Not reduce the diameter.

This build is a 1936 Ford Sedan 350 with an original Mustang II crossmember. There is no room between the motor mount and universal joint.

The question is....Can I shorten the pinion shaft?

454 RATTLER
Yes, you can shorten it. As previously stated, there will be no way (short of welding) to safely attach a u-joint to it with the splines cut off or severely reduced in length. So you need to make up your mind if you want a one-off rack with a welded on u-joint or if you'd rather modify your engine bay to fit it properly.

Russ
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Old 08-08-2013, 05:32 PM
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Quote:
Originally Posted by 454 Rattler View Post
Maybe you misunderstood what I want to do.
I want to SHORTEN the pinion shaft Not reduce the diameter.

This build is a 1936 Ford Sedan 350 with an original Mustang II crossmember. There is no room between the motor mount and universal joint.

The question is....Can I shorten the pinion shaft?

454 RATTLER
I understood. Once the spline is cut off you have a round shaft left. Cut a new spline on the round shaft.

There have been a ton of cars done with Mustang crossmembers and 350 engines. You can make new brackets to rotate the rack for clearance, run the steering shaft through a hole in the motor mount bracket, or some other method. I have even spaced the left motor mount back for shaft clearance
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Old 08-09-2013, 08:46 AM
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I noticed that aftermarket crossmembers have tapered mounts for the rack. I spent some time yesterday building new brackets to rotate the rack and that should fix the problem.

Does anyone know if the pinion shaft is solid ?

This all started when a friend told me Not to cut the shaft becaust it would affect the function of the rack and pinion.

Thanks for the help !


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