TA Power Steering Pump

[VCODE]

Ok, so how do I tell if the Federal Power Steering pump I have is the correct pump for a TA with Quick Ratio Steering.
I have a Federal pump but not sure about the correct pressure to work with a TA steering Box
The Part # in the book shows a 3004799. What casting # number on the pump to tell if it's for a TA.
Bob

[Floyd]

Bob, I don't think there are any external differences between the various applications for Federal p/s pumps. The casting numbers are the same. I think they were set up for the required application via the internal pressure valve. I'm guessing they were identified via external paint daubs. For my quick ratio T/A I tried to find an original pump out of a 70-71 C-body, since they had the same pressure setting. I never found one though and ended up paying through the wazoo for an NOS pump. Probably not worth the trouble and $$$, but at this point in my resto what's a few more hundred ollars😂

https://www.hiltopautoparts.com/product/nos-mopar-power-steering-pump-1969-71-c-e-body-models/

[Bossgold]

Here is the correct T/A Power steering fast ratio Federal pump. See pictures. Federal pump. pulley(date coded 1129 112th day 69, hose High pressure( date coded 0  15 0)  and cooler bracket date coded 0 21 0. Pumps are stamped on back but hard to see. Pumps used :

4 pumps used
.94L Key shaft Saginaw (oval filler tube)
.96L Solid end shaft 4 5/8" ID reservoir TRW Small Pump
1.06L 3/8" threaded internal hole shaft 4 7/8" ID reservoir (The Federal)
1.20L Hex Hole shaft 5 1/8" ID reservoir TRW Large Pump

The flow control valve was also the relief valve.

So what was the difference? Operating pressure. The A bodies were 750 to 850 psi, B bodies and
hemi 950 to 1050psi. Also shared with the big block A bodies in 69 and the AAR/TA in 70.
The C bodies except 318 1100-1300psi.

[VCODE]

Thanks for the great info. Now to see if I can pressure test my pump to see what pressure it is putting out.
Bob

[anlauto]

This is great info....I had no idea the boxes worked under different pressure 

[Bossgold]

@VCODE  @Floyd  Floyd is correct its the pressure valve and the housing which dictates the pressure. From the outside, Federal pumps look the same. VCODE, the part number you listed is the same for what I have, I found it to be 3004799 ( after a double take- See PIcture). The 3004800 was for other cars (E-Body 340) that offered the Quick ratio. Couple of other key points:

1. not all pumps can be rebuilt - if they are run dry the plates/vanes inside the pump score the housing. THey can be machined but its easier to find a better pump and use the internals - and make sure your getting the correct pressure flow valve

2. Core rebuilders, just rebuild the pump. KEY Point : Since the flow valve is simple and stays with the housing, as long as your not mixing and matching on the repair you should be ok. THats why I marked my original AAR pump when I sent it in to get refurbished.  But if you buy at the local parts store a remanufactured federal pump, you do not know which of the 3 Pressure variations you are getting. Thats why you have had some pumps that did not feel right on your car - challenger I drove had super hyper oversteer.....really bad.

3. Federal Pumps, Pressure hoses, Coolers and Pulley are specific to the AAR and T/A cars. The parts might be interchangeable but the MPC calls out 340 3-2 Bbl (pump 3004799). I used the date codes to validate these where correct which means the parts were either mid 1969 or very early 1970 (015 0, 021 0, etc. for 15th day 1970 dates). I have several PS sytems that I have restored and the hardest date code to see is on the Federal Pumps.....some don't seem to have the assembly Date stamped in them.

4. Power steering boxes have springs and shims in them which is how Firm Feel and others rebuild these for Stage 1, Stage 2 and stage 3 firmness. So the pump pressure and the stage of the box play a roll in the steering along with the geometry of the front end ( Idler arm length, pitman, positve arm caster, etc.) There is a discussion that the AAR/TAs had incorrect Idler arm lengths which made the left front wheel turn faster than the right passenger. So I am trying a longer C body idler arm to correct oversteer along with the caster degree.

At the end of the day, for me its a good option on my AAR cuda that it came with power steering. Unlike AAR's T/As came with 3 options instead of two - manual, S74 Quick ratio and S77 power steering option. So my AAR has the original Federal pump and all original correct parts that are date coded.....now just got to fine tune it. I have seen other options like Saginaw pumps, Federals without Coolers, Borgeson after markets and they all seem to work but I want my car to be original as much as possible.

[VCODE]

Thanks Bossgold,
Wow that a hand full to swallow.
I will be checking to see the # on the pump I have and see how to proseed.
Bob