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Thread: steering box

  1. #1
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    steering box

    can anyone tell me if you can use any other steering box on a tri five

  2. #2
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    There is no ready substitute other than an aftermarket power steering box made for the car, like a CPP 500.

  3. #3
    Registered Member chevynut's Avatar
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    There a 605 box conversion that was "the thing" to do for many years. Lots of cars used these power steering boxes.
    56 Nomad, Ramjet 502, Viper 6-speed T56, C4 Corvette front and rear suspension


    Other vehicles:

    56 Chevy 2-door BelAir sedan
    56 Chevy 210 4-door sedan
    57 Chevy 210 4-door sedan
    1962 327/340HP Corvette
    1961 Willys CJ3B Jeep
    2001 Porsche Boxster S
    2003 Chevy Silverado 2500 HD Duramax
    2019 GMC Sierra Denali Duramax

  4. #4
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    No reason to use anything other than a 500 style PS box if you want power or OEM rebuilt for manual steering. The stock box on these cars was one of the first recirculating ball steering boxes, they are very good boxes compared to other cars of that era. The 605 is a step backwards in technology and requires you cut up an original box to build an adaptor.

  5. #5
    Registered Member chevynut's Avatar
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    If the 605 was "a step backwards" then why was that the upgrade to do in the late 70's through the early 2000's? The boxes came in the 70's and early 80's cars. Lots of guys did it back then before the newer boxes were available. There are better alternatives now, but the 500 isn't the only alternative.
    Last edited by chevynut; 02-17-2016 at 07:53 AM.
    56 Nomad, Ramjet 502, Viper 6-speed T56, C4 Corvette front and rear suspension


    Other vehicles:

    56 Chevy 2-door BelAir sedan
    56 Chevy 210 4-door sedan
    57 Chevy 210 4-door sedan
    1962 327/340HP Corvette
    1961 Willys CJ3B Jeep
    2001 Porsche Boxster S
    2003 Chevy Silverado 2500 HD Duramax
    2019 GMC Sierra Denali Duramax

  6. #6
    Registered Member NickP's Avatar
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    If I recall correctly, the 605 was available back in 1964 on a Buick Special & Pontiac Tempest. Regardless, far from a "step back".

  7. #7
    Registered Member chevynut's Avatar
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    Found this: http://www.hemmings.com/magazine/hmn...s/1455074.html

    "The Saginaw gearbox is a rotary-valve type unit using recirculating ball bearings. They are referred to as recirculated ball-type because they use the same ball bearings on both the worm gear and the sector gear to reduce friction within the housing. You will often see this gearbox referred to as an "800" or "605" unit. The only major difference between these two units is how the pitman shaft is held into the unit. An 800 unit has a four-bolt cover on the top of the unit (the end of the shaft opposite the pitman arm spline). The 605 units use a single snap ring that holds a round cover into the top of the housing. GM also used two gearboxes, depending on the weight and size of the model. Station wagons, full-size cars and large front-wheel-drive cars used a heavy-duty gearbox usually identified by GM part number 5687962. These units had a 3.5-inch piston diameter, and the pitman shaft will turn anywhere from 3.5 to four turns between fully locked left and fully locked right. These units were rated at a 17.5:1 steering ratio. Mid-size and smaller models used a steering box tagged 5691676, and these units used a 3-inch piston. The travel on the smaller-piston unit was three to 3.5 turns lock to lock. The mid-size gearboxes were rated at a 14.4:1 steering ratio. Both the 3.5-inch and the 3-inch-bore gearboxes have a .813-inch input shaft diameter, and most will have 31 splines on the input shaft. You can substitute between both of these units. Aside from the mounting bolt pattern (most are 4-bolt mount but there are two different three-bolt mounts, as well), these units are all interchangeable. The more responsive 14.4:1 ratio gearboxes replaced the earlier 17.5:1 ratio boxes in most models by 1973. This is a good thing to remember when you begin your search for a replacement. You can locate one of the basic Saginaw "800" series power steering boxes in one of these vehicles:

    1964-'76 AMC
    1961-'76 Cadillac, including
    1963-'76 Eldorado
    1964-'76 Buick and Pontiac full-size cars and Riviera
    1973-'76 Regal
    1975-'76 Skyhawk, Seville, Monza and Starfire
    1965-'76 Chevrolet full-size cars
    1967-'76 Camaro and 1968-'76 Nova
    1964-'76 Chevelle, Cutlass, GTO, Grand Prix, Lemans, Ventura and Tempest
    1971-'76 Vega and 1975 Pontiac Astre
    1960-'76 Oldsmobile full-size cars including 1966-'76 Tornado
    1971-'76 Jeep Cherokee, Wagoneer, Gladiator and J-series pickups
    1972-'75 International Scout and Traveler
    56 Nomad, Ramjet 502, Viper 6-speed T56, C4 Corvette front and rear suspension


    Other vehicles:

    56 Chevy 2-door BelAir sedan
    56 Chevy 210 4-door sedan
    57 Chevy 210 4-door sedan
    1962 327/340HP Corvette
    1961 Willys CJ3B Jeep
    2001 Porsche Boxster S
    2003 Chevy Silverado 2500 HD Duramax
    2019 GMC Sierra Denali Duramax

  8. #8
    Registered Member MP&C's Avatar
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    Here's a CPP500 we're installing, it does have a few challenges with header clearance...






    Header clearance tool for tube #4...









    Drum sander clearance for tube #3... looks like we have some touch up painting to do..





    Much better...



    [/
    Robert



    MP&C Shop Projects-Metalshaping Tutorials


    Instagram @ mccartney_paint_and_custom


    .

  9. #9
    Registered Member rockytopper R.I.P 5-13-2017's Avatar
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    NICE^^^^^^^^

  10. #10
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    A 605 box does NOT have recirculating balls like the stock box. It has a simple worm and rack.

    Also the hydraulic valve in a 605 is built to give you WAY too much power assist too soon, and there's no good way to fix it.

    For those reasons and more, a 605 box is a step back from a CPP 500 box or similar box.

    There are no hard parts available to rebuild a 605 box. All you can do is seek out good used parts. (There are seal kits available.)

    For comparison, a stock manual (or power) box is 20:1 ratio, a 605 is 16:1, and a CPP 500 is 14:1.

    A CPP 500 box is a newly manufactured box (in Asia) that is a clone of a Saginaw 670 box except that the housing is configured to bolt to the frame like the stock box did. The housing is one piece, no welding.

    Borgeson and a couple of others sell rebuilt 670 Saginaw boxes that have a fabricated lower housing and a longer sector shaft. I haven't checked prices in a long time but they were more expensive than the CPP box back then, and some required a new pitman arm too. (CPP uses the stock pitman arm.)

    There are also people out there selling 670 Saginaw boxes from Jeeps, unmodified, with an adapter plate. Thing is, that box and its adapter plate don't fit a 55-57 right because it's too thick.

    There are some other manual boxes on the market, but they don't fit. (Same could be said of boxes from other cars.) Thing is, they are the same technology as a stock manual box, so there's no advantage.

    As for a 605 box in 1964, I don't think so. To my knowledge, that was the first year for a Saginaw 800 box. An 800 box is bigger and has a 4 bolt top cover. It's too big for a 55-57 in most cases, and I don't think it's ever been built with a long sector shaft like is needed.

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