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#348382 - 01/15/03 02:02 AM Non-SS F41 steering box vs. SS box...differences?  
Joined: Jul 2000
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200kSS Offline
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200kSS  Offline
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Joined: Jul 2000
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Bloomsdale, MO
I've got a some play in my steering gear box and want to swap it with one from a donor LS F41 car. Will the ratio be the same? How about the "feel"?
Thanks.


88 SS Black/Oxblood. Power Tour car
80 Malibu 2dr. Drag Week car
#348383 - 01/15/03 12:05 PM Re: Non-SS F41 steering box vs. SS box...differences?  
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Posts: 625
Z16Monte Offline
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Z16Monte  Offline
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Newark DE USA
Although I don't know of any specific differences, the steering in my SS definately feels heavier than my LS. Both are F41

#348384 - 01/15/03 02:46 PM Re: Non-SS F41 steering box vs. SS box...differences?  
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Posts: 594
GNVAIR Offline
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GNVAIR  Offline
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Southern New Jersey
Before condemning the box, make sure you check the pot joint as these wear and will feel like play in the box. Also check front end parts such as the centerlink, idler arm and tie rods as all it takes is one loose part to cause play.
If all of the above check out fine, then check the lash on the box as they can loosen up. The lash can be adjust by turning the screw and nut on the top of the box. Just dont make it too tight. Jeff Davidson has an excellent write up on his site how to do it.
The differences between the steering boxes are as follows.
From 78-88 some of the non F41 equipt cars came with a Saginaw 605 box. This is identified with a round top cover retained with a snap ring. The other box used is the better Saginaw 800 box which has an aluminum top cover retained with 4 bolts. Use of this box does not mean the car has F41.Because of this fact; it came in 2 basic flavors. Non F41 is variable ratio and F41 with a specific ratio. When installed on vehicles with the F41, there is a different pressure regulator valve installed in the pressure outlet on the pump body. The combination of the specific rate and the heavier spring in the regulator valve gives the "heavier" feel. The variable ratio makes the steering easier as it gets further away from center.

#348385 - 01/15/03 06:50 PM Re: Non-SS F41 steering box vs. SS box...differences?  
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PB86SS/87LS Offline
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PB86SS/87LS  Offline
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New Berlin, WI
Im not sure but I would think the ratio would be different since the SS has the larger wheels than the non SS's.


-86'SS 383 CCC QJet- BRF 2004r-8.5" 3.42
-87'LS 350 MAF/SD TPI- CRF 2004r-7.5" 3.42
-81'Grand LeMans Safari Wagon 350 CCC Q-Jet/CZF 2004-r/8.5" 3.73
-07'TBSS Stockish daily driver
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#348386 - 01/16/03 03:18 PM Re: Non-SS F41 steering box vs. SS box...differences?  
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Jeff Davidson Offline
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Lexington, Ky, USA
Theoretically, the SS should have a 12.7:1 constant ratio box. The XH box is the same, but with tighter internal stops and a slightly stronger torsion bar in the valve assembly.

http://jeffd.50megs.com/steering_box_internals.htm

The non SS and non-F41 boxes are usually a variable ratio box using the 14.4:1 worm gear with light effort valving.

There are also constant ratio 14.4:1 boxes. I am using one from a Firebird that came with 16" rims. Code is 'YN'.


Jeff Davidson
http://jeffd.50megs.com (lots of useful info)
#348387 - 01/16/03 04:51 PM Re: Non-SS F41 steering box vs. SS box...differences?  
Joined: Jul 2000
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200kSS Offline
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200kSS  Offline
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Bloomsdale, MO
I may try the adjustment procedure. A few years ago my tech school instructor said that unless you are at the exact "hypoid"? center of travel any adjustment will not be correct. A quick test drive yesterday told me the suspension is nice: 12in. brakes,Hotchkis,Bilsteins,etc. but the steering needs a little help.


88 SS Black/Oxblood. Power Tour car
80 Malibu 2dr. Drag Week car

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