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Location: Cambridge, MA
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Bench testing a steering rack?
I have several steering racks, from 69 to 84. I want to rebuild one of them for my 69E.
Is there any way to test/measure which one is the best rack? Complicating the situation is the E has 105K easy miles on the rack whereas the 84 has 245K hard miles on the rack. and another rack from an 83 that I know nothing about. I can easily pull all three apart, and I'm sure wear will be easy to spot, but it there something I can do to ensure I rebuild (clean, inspect, replace, repack) the best one?
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Tru6 Restoration & Design |
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11-23-2007, 09:04 AM
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AutoBahned
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others will know more, but...
1. inspect carefully, maybe w/magnifier and don't neglect edges of teeth 2. measure clearances - do you have the factory manuals? they may detail some procedure for this... |
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11-23-2007, 11:34 AM
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Thanks Randy, never even thought to look...how much I depend on Pelican.
manual is clear cut: inspect bearings, bushings, rack and pinion, renew as necessary.
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11-23-2007, 12:55 PM
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I would just try to measure the gear lash with a dial indicator, or even by hand, and choose the rack with the least lash. Of course, make sure it operates smoothly across the whole range.
With its extra weight and wide tires, I'd bet the '84 rack has more wear than the E rack, but that's just a guess. Three point turns and steering inputs while stopped really do a job on the steering system. |
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11-23-2007, 03:43 PM
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Hey Shaun,
keep all the info that you get about rebuilding steering racks because I may need it in the future. As you know, my car was having terrible handling problems and after I replaced the rack (with one from an SC) the problem went away. I still have the original rack and may want to rebuild it in the future. It looks like a pretty straight forward job. Thanks, Tim G.
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EarlyS 1017 RGruppe 663 73 911T 3.2 01 Ducati S4 Monster 00 Ducati 996 |
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11-24-2007, 05:01 AM
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Bringing this up because I have a mystery steering rack. My original '70 rack is still in the car but I also have a nice looking rack attached to an aluminum crossmember.
The crossmember tells me it's at least and SC if not a Carrera rack. Are there any differences in gearing or otherwise between a long hood rack and a later short hood rack? edit: Through a little research it appears that the long hood racks are 2.7 turns lock to lock and the short hood racks are 3.25 turns lock to lock. Is that true based on what you guys know?
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-Jess Last edited by BlueSideUp; 02-15-2008 at 10:22 PM.. |
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02-15-2008, 10:13 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
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A search will set you free
Steering Rack "Rebuild" Procedure SC Steering Rack DIY Bearing Replace  There's not many specs to go by as far as service info. goes. Older factory manuals likely have the servicing procedure. I don't believe my '87 microfiche does.
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Kevin L '86 Carrera "Larry" Last edited by KTL; 02-16-2008 at 04:44 AM.. |
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02-16-2008, 04:41 AM
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MAGA
Join Date: May 2004
Posts: 10,776
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Shaun, PM'ed ya my cell. Give me a call if you want discuss this topic. SC Steering Rack DIY Bearing Replace
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German autos: '79 911 SC, '87 951, '03 330i, '08 Cayenne, '13 Cayenne 0% Liberal Men do not quit playing because they get old.... They get old because they quit playing. |
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02-16-2008, 04:50 AM
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Ah yes I've read through Tim's thread quite a bit, thank you for taking the time to post it. Thank you also for the bearing part numbers. I should be able to get those from Napa or perhaps an online source.
I'll go through the newer rack I have and see if I can compare the two regarding the lock to lock specs.
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-Jess |
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02-16-2008, 08:40 AM
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Quote:
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02-16-2008, 09:06 AM
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MAGA
Join Date: May 2004
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Quote:
Oops, I missed that this was from back in November. 
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German autos: '79 911 SC, '87 951, '03 330i, '08 Cayenne, '13 Cayenne 0% Liberal Men do not quit playing because they get old.... They get old because they quit playing. |
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02-16-2008, 10:12 AM
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Join Date: Aug 2005
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After I do this rebuild, do I have to get an alignment?? I haven't seen that in any of these posts. TIA. Cheers, Mike
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1981 911 SC Black / Black & Tan sunroof coupe. Run like the wind...straining the limits of machine and man... (Peart) |
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02-17-2008, 09:01 PM
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MAGA
Join Date: May 2004
Posts: 10,776
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Quote:
If you disconnect the tie rods from the rack end (this is somewhat difficult to do, but is do-able), you will not disturb the toe setting.
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German autos: '79 911 SC, '87 951, '03 330i, '08 Cayenne, '13 Cayenne 0% Liberal Men do not quit playing because they get old.... They get old because they quit playing. |
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02-18-2008, 03:16 AM
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Thanks!
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1981 911 SC Black / Black & Tan sunroof coupe. Run like the wind...straining the limits of machine and man... (Peart) |
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02-18-2008, 07:39 AM
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