Where did you get the pump from? I would check the inlet and outlet orifices
as W Bell suggests. Could be a bad pump. Why did you change it? The 440's
are basically all the same block. The heads will be different between the 68
and the 74. The 74 will have lower compression. It will also have a
different intake manifold and carb. But the basic engine is the same. If you
want to know all the differences go to www.allpar.com and look in their
engine section. AC control is probably different but the compressor is
probably the same. Brakes on 74 will be different, don't know if they are
interchangeable. The transmission will be the same, don't know where you
found the info that says they are different.74 would have part throttle kick
down which is so much better than the older style. Can be retrofitted.
Robin Giesbrecht
>From: Luis C <luis1024@xxxxxxxxx>
>Reply-To: mailing-list@xxxxxxxxxxxxxxxx
>To: mailing-list@xxxxxxxxxxxxxxxx
>Subject: Re: IML: power steering Date: Sun, 18 Apr 2004 14:40:59 -0700
>(PDT)
>
>Hi Everyone, I have a 68 that I replaced the power
>steering pump last week and now when i went to take it
>for a drive ( with the top down)and there was no power
>steering. I was dying to drive the car with the top
>down and I couldn't do it. What else would cause that
>problem ? THe oil level was fine in the pump. This was
>the first nice day in New York to take the car out
>with
>my KIds and I had to cancel. So if some one knows what
>else could cause the problem let me Know. Thanks
>everybody. Luis
>
>
>I have a 1974 New Yorker and i would like to know what
>parts would fit my 68. It has a 440. Is it the same as
>mine? I've heard that some are big blocks and small
>blocks. The ac,brakes,booster,PS,radiator, heater
>system or anything else. I know the tranny is
>different.
>THanks Luis
>
>
>--- W Bell <cbody67tx@xxxxxxxxxxxxx> wrote:
> > On the more modern power steering pumps, the
> > "orifice" is in a screw-in fitting near where the
> > pressure line screws into it on the back of the
> > pump. If the orifice is too large, it can cause an
> > overboost situation where the wheel will turn if you
> > breathe on it the wrong way. It's the size of the
> > orifice that determines the amount of boost the
> > system has. On the Saginaw pumps, there were
> > basically two diameter orifices--one for cars and
> > one for light trucks, with the cars having the
> > larger/higher boost orifices, at least back in the
> > 1960s, and the heavier cars probably having a
> > slightly larger one than the lower level and lighter
> > weight vehicles. Just a few thousanths of an inch
> > difference in the hole diameter can make a bigger
> > difference than you might suspect.
> >
> > The distance of the orifice from the pump may well
> > have something to do with reducing a harmonic caused
> > by the fluid flow in the hose, so making sure all of
> > the dimensions are "dead on" from the production
> > hose is important.
> >
> > Just some thoughts,
> > W Bell
> >
>
>
>
>
>
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