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12-14-2013, 08:07 PM
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#1 |
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Registered User
Join Date: Oct 2009
Location: Price, Utah
Posts: 68
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Faster steering
I,m doing some up grades to my 71, and I have heard that a 73 and newer PS box has 3.5 lock to lock ratio were my 71 has a 4.5. Does any know if you can up grade to the quicker and new box?
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12-14-2013, 09:15 PM
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#2 | |
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Registered User
 
Join Date: Apr 2013
Location: Gainesville, TEXAS
Posts: 658
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Re: Faster steering
Yes you can, pretty much as simple as removing the pitman arm, the rag joint, PS lines and 4 mounting bolts.
It's a direct replacement, be sure the splines for the pitman are the same between the two, if not you'll need that as well. Quote:
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1972 Chevrolet Cheyenne LB 1/2 ton finished restoration/rebuild 1995 350 throttle body FI, 4L6E (running on modified GM wiring harness) 3.08 posi rearend, factory A/C on 134A, p/s, p/b, late 70's power windows and locks and cruise, speakers in the dash + 6x9's behind the seat, factory tilt, 40 gallon fuel tank in the bed with integrated tool box, air assist bags on the rearend, sway bar up front and much more. 1972 chevrolet SNB finished 2002, 350 TB FI, TH400, factory A/C, p/b, p/s, (FOR SALE) 1969 Chevrolet 1 ton in work, home made PTO dump bed extended frame, 350 CI , 1972 Chevrolet 3/4 ton suburban future project 1972 Chevrolet 3/4 ton p/u maybe a project one day 1966 Toyota Landcruiser my playtoy |
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12-14-2013, 09:18 PM
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#3 |
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Registered User
 Join Date: Oct 2012
Location: Newhall CA
Posts: 1,195
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Re: Faster steering
only thing is they went metric on the lines and fittings not sure what year, if pulling from junk yard pull lines too.
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69 SWB 780hp Hellcat powered, manual 6 speed, currie 9 |
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12-14-2013, 09:28 PM
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#4 |
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Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,280
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Re: Faster steering
Sometime along around the 80 time line is when the metric fitting thing happened. If you take the line take also the large nut from the back of the power steering pump[ that is the pressure regulator] it is all you need to change you existing pump over to use the newer metric fittings. If you do go to the newer type fittings you can go up to the 87 model year on trucks and up to the 90 model year on the R-V series Suburban& Blazer[as long as the body is square and it is 2wd to 2wd or 4wd to 4wd]. Jim
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12-14-2013, 09:29 PM
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#5 |
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Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,280
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Re: Faster steering
The newer boxes may be even quicker[ratio wise] than the ones from the 70's with more improved road feedback and steering control.
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12-15-2013, 12:30 AM
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#6 |
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Senior Member
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,860
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Re: Faster steering
77-79 boxes have the closer ratio, and are not yet metric. Be prepared to change the rag joint. I have done two in the last six months, both we're the close ratio (3 1/2 turns), and had the same part number. one had the .72 old style shaft at the rag joint, and the other had the .62 shaft at the rag joint. I have been doing this swap for over 30 years, and sometimes I have to change to the newer .62 diameter rag joint and sometimes I can use the old rag joint. Apparently the rebuilder doesn't pay much attention to the diameter of the input shaft.
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12-15-2013, 03:10 AM
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#7 |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: Faster steering
Check with these guys, i think they build a direct bolt in for our trucks thats 3.5..
http://www.redheadsteeringgears.com/contact-us
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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12-15-2013, 12:51 PM
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#8 |
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Registered User
Join Date: Dec 2007
Location: Southern CA
Posts: 210
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Re: Faster steering
Classic Performance has a brand new 500 series "modern" box for our trucks. All I can say is wow! Completely changes the characteristics of the truck all in a good way. Last I checked it is not on their website need to call them to order. It is direct fit but you need to get a new rag joint which they can provide.
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71 C-20 Custom Camper California Truck |
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12-15-2013, 01:07 PM
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#9 | |
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Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,147
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Re: Faster steering
Quote:
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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12-15-2013, 02:24 PM
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#10 |
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Senior Member
Join Date: Apr 2013
Location: Podunk, Texas
Posts: 762
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Re: Faster steering
I assume that it wouldn't make much sense to get one of the manual steering bolt-in boxes unless I eat enough spinach to develop Popeye arms?
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