Z51 Rack Identification
Thread Starter
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
Z51 Rack Identification
So... rack is shot at just under 100K miles. I'm sure the last 3 seasons of Auto-X had nothing to do with it.
None of the normal rebuilt sources have any idea and none of their books list a difference except if a C4 has 16" or 17" wheels.
I've got one coming in on Monday anyway as I need to get back together before next weekends Auto-x.
Anyone know a way to tell other than the 2.25 V. 2.75 turns lock to lock?
Thanks!
None of the normal rebuilt sources have any idea and none of their books list a difference except if a C4 has 16" or 17" wheels.
I've got one coming in on Monday anyway as I need to get back together before next weekends Auto-x.
Anyone know a way to tell other than the 2.25 V. 2.75 turns lock to lock?
Thanks!
Thread Starter
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
ttt.
Appears I may have lucked out & got a Z51 rack in the rebuild/swap. I installed last night & have just a fraction over 1 full turn in each direction, lock 2 lock.
There bottom cover on this rack is blank but may have been replaced in the rebuild?
Sound right on the lock 2 lock turns??
Appears I may have lucked out & got a Z51 rack in the rebuild/swap. I installed last night & have just a fraction over 1 full turn in each direction, lock 2 lock.
There bottom cover on this rack is blank but may have been replaced in the rebuild?
Sound right on the lock 2 lock turns??
Last edited by Trog; Apr 28, 2009 at 01:40 PM. Reason: spelling fix
Pro
Joined: Mar 2008
Posts: 552
Likes: 2
From: Dubuque Iowa
Most people get this wrong, but it is 2 turns lock to lock for a Z51 and a Z52. 2.5 turns for a base model... When I originally had mine redone, people told me all kinds of lock to lock numbers. The book says 2 turns, the parts suppliers say 2 turns, the GM techs at the chevy dealer say 2 turns, and my Z52 has 2 turns!
Make sure you test you rack when you get it... the GM dealer got the wrong one in twice, and a defective one once, glade they had to pay all the labor for their suppliers mistakes
Make sure you test you rack when you get it... the GM dealer got the wrong one in twice, and a defective one once, glade they had to pay all the labor for their suppliers mistakes
Thread Starter
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
Thanks for the update... Will check it again tonight for a full lock to lock count. I know when I counted from the center it sure wasn't much more than 1 full turn to lock... didn't seem like 1/4 of a turn. Maybe 1/8? But the lock is caused by the nylon bushing at each end of the rack as it hits the rack housing. Any variation in the size of that bushing will cause some change.
Rack was sourced from a local Kragen auto which carries Cardone rebuilt parts. I selected it based
on price & it comes w/ a limited lifetime warranty... Other rebuilds all were only 1 year.
Rack was sourced from a local Kragen auto which carries Cardone rebuilt parts. I selected it based
on price & it comes w/ a limited lifetime warranty... Other rebuilds all were only 1 year.
Last edited by Trog; Apr 28, 2009 at 08:23 PM. Reason: add some text
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Thread Starter
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
Bad news... new rack pukes fluid out the pinion seal like a mother.... vendor is getting me a new Delco model to replace it in the AM... Time is of the essence with an Auto-x on Sat that is a 5 hour drive.
I have pics & my service manual but can someone confirm that the high pressure line is the lower fitting on the rack. Return is higher up or closer to the steering pinion input.
thx!
I have pics & my service manual but can someone confirm that the high pressure line is the lower fitting on the rack. Return is higher up or closer to the steering pinion input.
thx!
Pro
Joined: Mar 2008
Posts: 552
Likes: 2
From: Dubuque Iowa
Bad news... new rack pukes fluid out the pinion seal like a mother.... vendor is getting me a new Delco model to replace it in the AM... Time is of the essence with an Auto-x on Sat that is a 5 hour drive.
I have pics & my service manual but can someone confirm that the high pressure line is the lower fitting on the rack. Return is higher up or closer to the steering pinion input.
thx!
I have pics & my service manual but can someone confirm that the high pressure line is the lower fitting on the rack. Return is higher up or closer to the steering pinion input.
thx!
