Steering Rack Question...
Thread Starter
Le Mans Master
Joined: Jun 2001
Posts: 6,694
Likes: 3
From: Less Talk, More WOT | Houston TX
Steering Rack Question...
I have the power steering rack out of my '89 L98. It looks to be in good shape and has been leak free but my steering wheel has always had about an inch of play in it before it does anything to affect the steering. I am assuming this is the fault of the actual steering gear box mounted on the rack am i correct? I was wondering if it is possible to replace just that gear box, and maybe upgrade to the Z51 box to get the quicker steering ratio. Anyone ever done this before and/or know where I can buy just the Z51 steering box?
Thanks,
Wheelman
Thanks,
Wheelman
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
no... the rack is really not very user servicable. A reman'd rack won't cost that much, really.
Also, check to be sure that the various bolts that hold the wheel to the rack and the rack to the car are good and tight.
Also, check to be sure that the various bolts that hold the wheel to the rack and the rack to the car are good and tight.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
There is no "steering box". The rack and pinion steering gear assembly consists of a toothed bar (rack) that is moved left and right, as the teeth of the pinion are turned by the steering column, via the steering wheel. Typically steering "play" comes from the inner and/or outer tie rod ends. The common problem with the rack and pinion assembly, is "morning sickness", where the power assist is weak, or nonexistent, especially on start up and when cold. It gets worse with more wear and age. You can buy a rebuilt rack at most parts houses. I have never heard of anyone checking the core to be sure it was the same as the unit sold. Therefore it is a simple matter to swap from standard steering to a fast steering rack and pinion.
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RACE ON!!!
Thread Starter
Le Mans Master
Joined: Jun 2001
Posts: 6,694
Likes: 3
From: Less Talk, More WOT | Houston TX
Thanks guys...So no regrets against just buying a reman rack from Autozone or something? Also how do I tell them apart? When I look online the choices I get are " w/ Production Code FH on Dust Cover" or " w/ Production Code NS on Dust Cover" Anyone know which one is for Z51?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Wheelman
Thanks guys...So no regrets against just buying a reman rack from Autozone or something? Also how do I tell them apart? When I look online the choices I get are " w/ Production Code FH on Dust Cover" or " w/ Production Code NS on Dust Cover" Anyone know which one is for Z51?
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Burning Brakes
Joined: Sep 2006
Posts: 1,202
Likes: 3
From: MD
I already had a Z51. When I went for my rack I got it from the local CarQuest powered store. I believe they asked me if it was the Heavy Duty one or something which I took to be the Z51. Both were the same price. Both are definitely the same outside and I'd highly recommend the quicker one.
Thread Starter
Le Mans Master
Joined: Jun 2001
Posts: 6,694
Likes: 3
From: Less Talk, More WOT | Houston TX
Originally Posted by CFI-EFI
My parts books shows The "NS" and the "FH" to be the designators for the first and second designs. Was the fast steering available on 1989?
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Le Mans Master
Joined: Jun 2006
Posts: 5,642
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From: One day you're a Comet...the next day you're dust... Arkansas
Originally Posted by Wheelman
Interesting. I wonder what the difference is. I could have sworn that the '89 Z51 has the fast ratio steering but I will have to get home and check my Black Book to be sure unless someone else here knows.
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Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Wheelman
Interesting. I wonder what the difference is. I could have sworn that the '89 Z51 has the fast ratio steering but I will have to get home and check my Black Book to be sure unless someone else here knows.
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Thread Starter
Le Mans Master
Joined: Jun 2001
Posts: 6,694
Likes: 3
From: Less Talk, More WOT | Houston TX
Originally Posted by CFI-EFI
On the cars with standard and fast steering, the standard steering is 2 1/3 turns, lock to lock. The fast steering is 2 turns. I have hand written notes in my parts book, that says the "NS" is the fast steering, but officially, according to the book, there is no "fast" steering in 1989. Previous years show with FE3 or FE7 or with different wheels, that would suggest different ratios. The 1989 only shows first and second design for 1989.
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Should I just get the "Late Version" and be done with it? Maybe there is no reason for me to have faster steering. 
Anybody know how the later models are set up? Is one rack standard for all models after 88? 
I learn more about these things every day.
Racer
Joined: Nov 2004
Posts: 445
Likes: 0
From what I have seen, movement like you describe comes from tie-rod ends as CFI said, the connecting joints like Bogus said, the tie rods themselves at the point of attachment to the rack, excessive back-lash in the rack (most likely) and the actual mounting points of the rack to the sub frame.
Before replacement, if it was my car, I would check all of the above, esp.the tension of the rack mounts....
Before replacement, if it was my car, I would check all of the above, esp.the tension of the rack mounts....