Click To Track Your Order

 

These are some of the questions I frequently receive from customers regarding the fast ratio conversion on 60's, 70's GM & AMC cars and trucks.  Many of the conversions apply to Dodge pickup trucks, Jeeps, S10s, Blazers, Chevy pickup trucks and others.  If your questions are not answered here about fast ratio conversions, please call or "e-mail me".  Calling me at 1-417-739-9010 can be better so we can discuss your system as I talk much better than I type.  

What is a "fast ratio" and what is a "slow ratio"?
In the 1960's , GM used, almost exclusively, a 20:1 ratio power steering gear in most of their cars.  Some of the exceptions were the 1969 Camaro and some full size Pontiacs that had the popular 16/13:1 variable ratio power gearbox.  Those that came with 20:1 ratios, turn a full 4 to 4.25 turns lock to lock.  The cars with 16/13:1 ratios turned from 3.50 turns lock to lock to 3 turns lock to lock. 

How many turns, lock to lock, will I have if I have the "fast ratio" conversion done to my car or truck?
Generally, depending on the car's need for internal stops, between 2.5 to 3 turns (lock to lock).  Light trucks will generally be from 3.25 to 3.5 turns lock to lock with a 16/13:1 conversion. Late model light trucks through 1989 & later will be 3 turns or a little less.

Will I lose my turning radius?
No, the installation of our "fast ratio" conversion WILL NOT decrease your turning radius.  I determine with the customer what is proper for their vehicle and install or remove the stops as necessary.

Should I replace my power steering pump & hoses?
This depends.  If your power steering pump is leaking or more than 10 years old, we recommend rebuilding your current power steering pump.  The hoses should be replaced if they are brittle, leaking or are more than 10 years old.  I rebuild power steering pumps and can supply you with some new power steering hoses.

Can you change the ratio of my manual gearbox?
In many cases, yes, but remember if you do a fast ratio in a manual steering box it is "harder" to turn, NOT easier.  Please call me at 1-417-739-9010 to discuss your application.

Can I have the conversion on my original gearbox and have it returned to me?
Yes.  Many of our customers prefer to keep their vehicle original.  In many cases, your factory core can be made better than new.  Plus, using your core ensures the factory stops are in the proper location for your application to prevent loss of any turning radius.  If you would like to send your original gearbox to us, please see our shipping guide.  Once your original gearbox is received, we will do a full detailed inspection to determine if it's re-buildable.  If not, we can supply you with another gearbox matching the style of your factory gearbox with the proper stops.  Most gearboxes that are closed and full of oil are rebuildable.  If there is water in the gearbox it is usually what I call a "boat anchor" and are not rebuildable. 

What is the difference between rebuilt and remanufactured?
The terms rebuilt and remanufactured are used to describe how a rebuilder or manufacturer wishes to present their product and are basically synonymous. Because there is no industry standard that sets parameters for what constitutes rebuilt or remanufactured products, rebuilders must only differentiate their products from new products by labeling them as rebuilt or remanufactured. Customers should ask a supplier of remanufactured products what they do to rebuild their products so they will know what they are receiving for their money.

What is your rebuilding process?
The steering unit is cleaned and inspected for external damage and physical function.
Then it is disassembled, cleaned again, and inspected for internal damage and wear.
Shafts are reconditioned and polished or replaced.
Housings are honed, sleeved or replaced as required.
Parts are cleaned again and prepared for reassembly.
The unit is reassembled with new OEM (original equipment manufacturer) seals, teflon rings, O-rings, bearings and other parts as needed.
All settings and adjustments are set to factory specifications.
Final testing is performed for function, pressure and leaks.
Standard detailing includes priming & painting the unit.  Optional "Extreme" detailing takes the unit down totally to bare metal.  Self etching primer is applied then the unit is sprayed with "cast" paint.  Custom colors and finishes may be available at an extra charge. 

If a unit is non-rebuildable due to damage or extreme rust, the customer is notified of their options:
Return the unit to the customer.
Supply the customer with a rebuildable core unit for an additional charge. Core charges are generally what you would pay for a unit at a salvage yard.
Or other possibilities.


What is a quick-ratio conversion and why would I want one?
During the 1960s and 1970s, GM installed power steering gearboxes in their "A" and "F" body cars that had a very slow turning ratio. It took as many as 4 to 4
½ turns of the steering wheel to get the wheels to turn from extreme right to extreme left. This slow turning ratio was most noticeable when parking or negotiating curves. Not only does it take more turns of the steering wheel to turn the wheels, it also takes more turns of the steering wheel to correct the direction of the car. This means that correcting quickly in a curve or taking evasive maneuvers to avoid an accident or road hazard takes longer with a slower turning ratio.

With our quick-ratio conversion, we install a NEW factory quick-ratio worm gear and power piston in your gearbox as it is rebuilt. This will give you a 12.7:1 ratio and bring your car from lock to lock in 3 turns or less, depending on your car's application. This will greatly enhance the car's driveability, handling, and ability to avoid road hazards.

Will the fast ratio conversion make my car "twitchy" or jump lanes?
No.

Can I take a power steering gearbox from a late-model Camaro or Firebird and make it work on my Chevelle, GTO, 442 or GS?
There are several things to consider before attempting this swap:
The Camaro/Firebird gearboxes have internal stops built into the gearbox to limit the amount of swing for the pitman arm ("F" bodies do not need as much swing as "A" bodies). If you install an "F" body gearbox on your "A" body without removing the internal stops, the turning radius of your car will be reduced and you will have a hard time making U-turns or parking.
If a late model (1980 and up) gearbox is used, the flex coupling will need to be changed because it is smaller in diameter than the early models.
The power steering pump pressure and return lines must be changed, since the late model gearboxes are metric and the early models are SAE. In addition, the pressure fitting on the back of the power steering pump will need to be changed to metric.

What do I have to change if you convert my gearbox to quick ratio?
NOTHING! Just remove the gearbox and ship it to me with or without the pitman arm attached. I will convert it and ship it back to you ready to install.

Can you convert my full-size GM car gearbox to a faster ratio?
Yes, there are two ways to accomplish this depending on the steering geometry of the car. Contact Chip at Power Steering Services for details at 417-739-9010.

What is your warranty?
Please review our limited lifetime warranty.