Anyone who has wrestled a big-tired truck into a tight parking area or threaded a classic muscle automobile through a winding roadway knows the limitations of manual steering. Transforming to power help transforms the experience, however not all packages are equivalent and not every lorry reacts the same way. I have set up, tuned, and periodically returned more than a couple of setups for many years on everything from square-body Chevys to early Broncos and A-body Mopars. The best conversions feel factory-stable at highway speed, need little effort on the wheel at low speeds, and do not introduce new headaches like pump whine, bump https://postheaven.net/gwaniekume/transitioning-from-manual-to-power-steering-key-steps-explained steer, or u-joint binding. The worst feel twitchy, leak early, or need continuous fiddling.
This evaluation walks through the significant categories of handbook to power steering conversion choices, the leading gamers in each classification, and how to choose a set that fits your car and use case. It also covers the little pieces that make or break the install, including steering columns, an aftermarket steering shaft that in fact clears headers, and the ideal steering universal joint to manage odd column and box angles.
Where a conversion makes the greatest impact
Manual steering can be completely functional on a light car with skinny front tires. Add weight, bigger tire contact spots, modern caster settings for stability, or off-road tires and manual boxes end up being work. A well-chosen power guiding conversion package lets you:
- Reduce steering effort at parking speed without losing road feel at 60 to 80 mph. Run more favorable caster for straight-line stability, especially on trucks that wander with stock specs.
The sweet area includes timeless trucks that tow periodically, muscle vehicles with broader front rubber and contemporary alignment, and vintage 4x4s that see blended street and path responsibility. On the other end, concours remediations and lightweight cars may benefit more from a rebuilt handbook box and fresh geometry if originality or simpleness outranks convenience.
The primary paths to power assist
Kits fall into a number of camps. Your vehicle and goals will point towards one of these paths.
Retain the original steering box and add a hydraulic ram. Popular on some classic Ford and Mopar platforms, this preserves factory linkage and a manual box with a power-assist cylinder. It keeps period look, however it adds tubes and can be finicky to tune for on-center feel. Parts are getting scarce sometimes and leaks are common if elements are mixed and matched.
Swap to a factory-style power steering box. This is the most common and often the most reputable. A steering box conversion package changes the handbook box with an OEM-spec or quick-ratio box. Lines and a pump complete the system. Feel can be excellent if the box ratio matches the vehicle weight and tire size. Many kits utilize reman boxes that differ in quality, so brand and service warranty matter.
Bolt-on rack and pinion conversion. Popular for traditional muscle and some trucks where space allows, rack conversions can improve on-center accuracy and often decrease bump guide when the set is well crafted. They also maximize header area in some applications. The downside is packaging complexity and, on some chassis, a bad tie-rod length or pivot inequality that presents bump steer if geometry is not corrected.
Electric power help on the column. This is growing fast in niche circles. A column-mounted electric motor includes help without modifications to the steering box or rack. It simplifies plumbing, removes a pump, and minimizes parasitic drag. It needs mindful installing, a strong column, and correct torque sensor calibration. Perfectionists might object, and high existing circuitry plus heat management should be considered.
For this evaluation, I focus on hydraulic conversions that a lot of lovers think about initially, with notes on when a rack or electric column makes more sense.
What separates an excellent kit from a bad one
The best power steering conversion kit is not simply a box, a pump, and a couple hoses. The information define the outcome.
First, guiding geometry. A power box with the wrong pitman arm length or spline setup can change steering ratio at the road, making the automobile twitchy or lazy. Second, actual ratio and valving. A quick-ratio box in a heavy truck with 35-inch tires can feel anxious without proper caster and high-effort valving. Third, parts quality. Pumps with careless tolerances cavitate. Pipes that come up short get zip-tied near headers and fail. An excellent kit includes a pump bracket that lines up belts, a proper rag joint or a premium steering universal joint, and clear instructions about alignment targets and bleeding procedures.
Noise is the big tell. A system that howls after warm-up, specifically throughout low-speed steering, typically experiences aeration. Poor reservoir design, pipe routing that welcomes suction leaks, or a return line dumping above the fluid level will have you chasing your tail. An aftermarket guiding shaft that binds is the other warning. If you are blending columns, collapsible shafts, and headers, prepare for a double U-joint with an intermediate support bearing to keep angles under 30 degrees overall and under 15 degrees per joint. That little piece of planning conserves hours of frustration.
Brand households and what they are known for
There are lots of labels on the market, numerous drawing from the very same little group of remanufacturers. The differences lie in testing standards, warranties, efficiency, and tech support. Below is a field-based map of typical choices by car type, not a comprehensive roll call.
Classic GM vehicles and trucks. Many kits use the Saginaw 700 or 800 series boxes. Borgeson and CPP have well-supported plans for A, F, and X bodies and square-body trucks. Try to find boxes with the appropriate input shaft size to match your column coupler and a choice of ratios. For square-body 4x4s, RedHead Steering's reman boxes have constant on-center feel, though you will buy the pump and brackets independently. If you desire a tighter ratio without losing stability, a 12.7:1 box with firmer valving works well on half-ton trucks with 31 to 33 inch tires.
Early Ford cars and Broncos. Borgeson's integral power steering conversion is a go-to for first-gen Bronco owners who are tired of the factory ram help system. It uses a modern essential box, a pump, hoses, and the needed column adapter. On early Mustangs and Falcons, Unisteer makes rack conversions that keep bump steer in check if installed with proper shimming. The Borgeson box tends to offer much better roadway feel than numerous aftermarket racks on these cars, though the racks can free up header space with certain engine swaps.
Mopar B and E bodies. Company Feel and Steer & & Gear have actually made devoted followings for remanufactured factory-style boxes with custom valving. Mopar owners tend to appreciate steering feel and wheel return, and these houses will build a box for your weight, tire, and intended usage. Pumps and brackets are often different purchases or sourced from contemporary Serpentine conversions.
Vintage 4x4 conversions. For strong axle Jeeps and Land Cruisers, PSC and AGR use heavy-duty pumps, remote tanks, and boxes or Saginaw conversions intended for off-road loads. These are overkill for a street-only cruiser however shine when tires get big and steering sees high loads on rocks. With 35s and lockers, a stock-style power box can overheat or cavitate. A PSC kit with a high-capacity tank, cooler, and proper tube sizes keeps assist consistent.
Electric column help. ePowerSteering and EPAS Efficiency deal column systems for classics where hydraulic product packaging is a mess or originality matters underhood. They incorporate torque sensing units and speed-sensitive assist in some applications. On heavy vehicles or huge tires, electric assist alone may feel labored at extremely low speeds, however for a light coupe or roadster it is elegantly easy and silent.
Real-world outcomes by platform
I will keep this practical with what tends to deal with typical vehicles.
GM A-body and F-body. A quick-ratio Saginaw box with matched pump is the simplest route. CPP's packages cover brackets for small block and huge block, and their pumps behave if the tank sits greater than the pump inlet and returns are routed easily. Borgeson's boxes often have tighter internal tolerances and better on-center feel out of package. Match the conversion with modern alignment specs, plus a quality guiding universal joint to replace used rag joints if you are running headers. The stock column can be maintained, but an aftermarket steering shaft with a double D slip section assists with engine movement and firewall software angles.
Square-body Chevy and GMC trucks. RedHead's reman box plus a Type II pump package from a reliable source delivers a solid steering feel and lowers pump whine compared to spending plan Saginaw pumps. Numerous kits consist of rubber hose pipes that swell slightly and dampen ripple; braided stainless looks nice however can send sound. If you tow or run larger tires, a little cooler plumbed into the return line helps fluid life.
Early Bronco. The Borgeson essential box package cleans up the front end compared to factory ram help. It brings better on-center feel and less leak points. Strategy to change the column length and use a guiding universal joint that matches the brand-new box input spline. The supplied pump bracketry lines up on little blocks, however huge block or 5.0 swaps may need custom brackets. Individuals forget alignment: an early Bronco likes more caster than stock after the conversion, typically 4 to 6 degrees with power assist.
First-gen Mustang and Falcon. Rack conversions are common, but bump guide can creep in if the rack's inner tie-rod pivots do not align with the lower control arm rotates. Unisteer's kits include spacers and guidelines to remedy this. If you prefer a factory look and strong steering feel, the Borgeson important box with a quality pump works well up to 245 front tires. An aftermarket guiding shaft with a retractable area is recommended for safety and to relieve setup around headers.
Mopar B and E bodies. A rebuilt box from Company Feel with phase 2 valving balances effort and feedback for roadway use. Initial pumps are great when healthy, but a modern pump bracket and tank streamline belt positioning. Many Mopar owners undervalue the rag joint; swapping to a guiding universal joint enhances accuracy, specifically with stiffer suspension bushings.
Jeep CJ and YJ, old-school Land Cruisers. If you wheel, choose a heavy-duty box and pump with a large tank and a cooler. PSC's pump and tank mixes resist cavitation in slow, high-load steering. A steering box conversion package that upgrades frame support near package is vital to avoid splitting. A double U-joint aftermarket steering shaft with an assistance bearing clears headers and prevents binding across suspension travel.
The little parts that make the huge difference
A conversion that feels factory-smooth owes its good manners to details most buyers disregard till issues appear.
Aftermarket steering components. Not all replacement pitman arms, idler arms, and center links are equivalent. Use joints from known suppliers or OE if available. Careless brand-new parts ruin a good box.
Steering universal joint quality. Inexpensive u-joints can bind and develop play within a year. Heat from headers accelerates grease breakdown. Quality joints from Borgeson or Flaming River, correctly aligned, last longer and feel tighter.
Aftermarket guiding shaft style. Slip areas avoid column tension when the engine rocks on its installs. For tight angles, a two-joint plan with an intermediate assistance bearing offers better geometry than forcing a single joint beyond 30 degrees.
Pump and sheave positioning. Even a couple of millimeters off will squeal and consume belts. Bracket packages that reference several mounting points tend to remain aligned much better than easy plate brackets.
Hose routing and reservoir option. A remote reservoir with a correct return diffuser lowers aeration and noise. Keep returns listed below the fluid line and away from heat. Do not install hoses where they chafe on the frame or crossmember. If space is tight near headers, use heat sleeves.
Bleeding treatment. Turn the wheel lock-to-lock with the engine off several times while topping the tank, then perform at idle and repeat. Many installers rush this and trap air, which shows up as a whine at parking speeds.
How to match kit to driving style
Daily motorist with moderate tires. A factory-style power guiding conversion kit with an OEM-spec box, standard-effort valving, and a Saginaw or Type II pump is often best. Pick a ratio in the 14 to 16:1 variety for stability.
Touring and spirited country roads. A quicker ratio box around 12.7:1 teamed with firmer valving offers the turn-in you want without dartiness if the automobile runs 3 to 5 degrees of caster. Couple with a premium steering universal joint and a strong intermediate shaft for precision.
Heavy truck or off-road. Think about high-capacity pumps with remote tanks, a cooler, and boxes developed for side load. Enhance the steering box install. Keep angles in the aftermarket guiding shaft conservative and supported.
Show develop with a tidy engine bay. Electric column assist keeps the bay neat and prevents pipes. It needs cautious column mounting and attention to electrical load. On heavy cars and trucks, hydraulic still feels more powerful at parking speeds.
Testing and feel, what to expect
On-center feel. A correctly set box must have a minor deadband at center that transitions efficiently into help. Excessive tightness at center may show incorrect preload on package sector shaft. Lack of center feel recommends used linkage or overboosted valving.
Effort gradient. Preferably, effort increases modestly with speed and guiding angle. Too light all over recommends an overboosted pump-valve combo. Too heavy at low speeds can be pump output or a flow control issue.
Noise and heat. A warm however not hot pump body is normal. If the tank bubbles after a tough parking area session, you have aeration. Include a cooler if heat stays high and validate return line submergence.
Straight-line stability. After a handbook to power steering conversion, reconsider toe and caster. Power help enables more positive caster, which helps straight tracking. Start with maker standards then nudge caster up a degree if the wheel still wanders.
A close look at steering box conversion kit components
A typical steering box conversion set must include a reman or new box, pump with brackets, pulley-block, pipes, and the essential coupler or u-joint to mate with your column. Some consist of a brand-new pitman arm. Take note of:
Input shaft size. GM boxes differ in between 3/4 inch 30-spline and metric 3/4 inch 36-spline inputs. Ford and Mopar have their own standards. Pick the right coupler or guiding universal joint to match.
Output sector and pitman arm clocking. Using the wrong arm or clocking can shift your center position, lowering turning radius on one side and causing unequal steering stops. Mark the center before disassembly and match it throughout install.
Pump style. Conventional Saginaw pumps work, but Type II pumps are compact and pair well with serpentine systems. On high-demand setups, choose pumps with recognized flow and pressure specs and a tank with an anti-foaming design.
Hose end type. Inverted flare, O-ring, banjo, and AN conversions frequently blend. If you prepare to plumb with AN lines, choose a set that supports it natively. Avoid stacking adapters that welcome leaks.
Universal joint steering and angles
When you change box area or switch to a rack, you frequently alter column-to-box angles. Universal joint steering setups endure a finite misalignment. Keep private joint angles under approximately 15 degrees for smoothness. If you should go beyond that, add a 2nd u-joint and a support bearing to separate the angle. Clock the yokes so the joints remain in phase. An out-of-phase shaft provides a bumpy feel, particularly around center. Some columns utilize a retractable section for security. Maintain that function when you adapt an aftermarket guiding shaft, and guarantee the slip travel exceeds engine and body mount movement.
Installation realities, 2 things to plan
Time and tools. Getting a package bolted on can take a long afternoon if brackets fit and lines are straightforward, or a full weekend if you need to tweak column length, fabricate a basic bracket, or path pipes around headers. You will want a pulley installer, a torque wrench, flare nut wrenches, and a technique to support the guiding column inside the cabin while you work under the hood.
Alignment and test drive. Spending plan time for an alignment afterward. Do not judge the last feel till you remedy caster and toe and re-center the wheel. Bring the vehicle back after a hundred miles to recheck for seepage at fittings and verify belt tension as brand-new belts seat.
Cost varieties and value
A quality hydraulic conversion with a reman box, pump, brackets, hoses, and a coupler typically lands in the 900 to 1,600 dollar variety for typical domestic platforms. Rack conversions run 1,400 to 2,500 dollars depending upon efficiency and needed subframe or crossmember adjustments. Durable off-road systems with big pumps, tanks, and coolers can climb to 1,800 to 3,000 dollars. Electric column assist sets vary commonly from 1,200 to north of 2,000 dollars, plus any column work.
The best value is the package that bolts on without constant rework which consists of trustworthy assistance. Expect extensive guidelines, real torque requirements, a parts list with part numbers, and a clear warranty. If a package leaves you scrounging for a pitman arm or thinking about pipe ends, your time expense eliminates any savings.
Common mistakes and how to prevent them
People often undervalue guiding shaft geometry. A header tube, a motor mount, or a lifted suspension can force uneasy angles. Prepare for an intermediate shaft with an assistance bearing and the ideal steering universal joint arrangement.
Pump choice can also journey up a conversion. A pump that streams too much at idle can make the wheel feel anxious and send kickback. Circulation control valves are readily available for some pumps, and specific packages tune this from the factory. If your box feels too light, do not presume the box is incorrect before you take a look at pump circulation and pressure.
Return line routing matters. A return line that dumps above the fluid level foams the reservoir. Use a tank with internal baffling or a submerged return. Keep the line away from the exhaust and moving suspension parts.
Finally, understand your alignment targets. After a manual to power steering conversion, your car or truck can deal with more caster. That single change frequently changes highway good manners from vague to confident.
A short purchaser's checklist
- Confirm box input and output spline specifications, pitman arm compatibility, and center position markings. Choose a pump with known flow and pressure specifications that match your box and tire load.
The right steering universal joint and aftermarket guiding shaft save setup time. Prevent tight single-joint angles by including a support bearing if needed.
Final word on feel and expectations
An excellent conversion ought to make the car seem like it always should have, lighter at low speeds, settled and accurate at rate. On a square-body truck with a good box and modern-day positioning, the guiding wheel should find center on its own after a turn, with only a tip of assist humming under heavy parking maneuvers. A timeless Mustang with a properly spec 'd integral box must sculpt a two-lane with calm hands at the wheel, not jerk or roam. A Bronco ought to stop dripping from its spaghetti of tubes and cylinders and steer like a modern truck.
What gets you there is not magic. Match the steering box ratio and valving to weight and tire size. Select a pump that does not outgun the box. Develop an aftermarket steering shaft that clears barriers with practical universal joint angles. Route tubes smartly with a reservoir that resists aeration. End up with an alignment that benefits from power help. The outcome is a cars and truck or truck that invites miles, not just admiration from the curb.
Borgeson Universal Co. Inc.
9 Krieger Dr, Travelers Rest, SC 29690
860-482-8283