How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Bob Your Own Question

Bob
Bob, Auto Tech
Category: Chevy
Satisfied Customers: 4087
Experience:  Plus 40 years GM, over 30 certified with Chevrolet, ASE certified Master Tech. (Expired, Retired)
Type Your Chevy Question Here...
Bob is online now
A new question is answered every 9 seconds

Can you adjust the steering gear box on a 1994 GMC sierra 1500

Customer Question

can you adjust the steering gear box on a 1994 GMC sierra 1500
Submitted: 5 years ago.
Category: Chevy
Expert:  Bob replied 5 years ago.

Note the instructions below pretty much cover about all of the GM power steering gear boxes used on trucks. If you see any big differences between this gear and yours, let me know. Also note that these are the only adjustments that GM recommends and it is critical that they are done exactly correct. The factory really does not like these things played with. Too tight will cause steering binding and extreme wear of the gear box, too loose and the truck will wander when steering. Also note that the adjustments are done with the gear box off the truck. Hope these help. Thanks

 

Off Vehicle

Steering Gear Adjustments

Important: Any steering gear adjustment is made only as a correction and not as a periodic adjustment.

Remove the gear from the vehicle prior to any adjustments.

  1. Drain the power steering fluid from the gear.
  2. Mount the gear in a vise.

    Important:

    Adjust the worm thrust bearing preload first, then adjust the pitman shaft over-center preload.
    The worm thrust bearing preload is controlled by the amount of compression force exerted by the adjuster nut assembly on the flat races.
    The pitman shaft over-center preload is controlled by the pitman shaft adjuster screw, which determines the clearance between the rack piston and the pitman shaft sector teeth.

     

  3. Adjust the following:
    3.1. The worm thrust bearing preload
    3.2. The pitman shaft over-center preload adjustment

Worm Thrust Bearing Preload Adjustment

Tools Required

J 42882 Adjuster Nut Socket


    Object Number: 321974  Size: SH

  1. Rotate the stub shaft (3) back and forth in order to drain the power steering fluid.
  2. Remove the coupling shield retainer and the lock nut (2) from the steering gear housing (1) using a drift and a hammer.
    Object Number: 321992  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Turn the adjuster nut assembly (1) clockwise using J 42882 until the adjuster nut assembly (1) and the thrust support assembly (2) are firmly bottomed in the steering gear housing (3).

    Tighten
    Tighten the adjuster nut assembly (1) to 28-31 N·m (20-23 lb ft).


    Object Number: 321996  Size: SH

  4. Place an index mark (1) on the steering gear housing (4) parallel with one of the holes (3) in the adjuster nut assembly (2).
    Object Number: 321997  Size: SH

  5. Measure back counterclockwise 13 mm (½ inch).
  6. Place a second mark (2) on the steering gear housing (1).
    Object Number: 322000  Size: SH

  7. Using J 42882 and a torque wrench, turn the adjuster nut assembly (1) counterclockwise 15-25 degrees in order to align the hole (2) in the adjuster nut assembly (1) with the second mark (4) on the steering gear housing (3).
    Object Number: 321974  Size: SH

  8. Install the coupling shield retainer and the lock nut (2).
  9. Hold the adjuster nut assembly in position in order to maintain alignment of the marks.
  10. Tighten the coupling shield retainer and the lock nut (2) using a drift in a notch.

Pitman Shaft Over-Center Preload Adjustment


    Object Number: 322005  Size: SH

  1. Rotate the stub shaft (3) back and forth in order to drain the power steering fluid.
  2. Loosen the adjuster lock nut (4).
  3. Turn the pitman shaft adjuster screw (1) counterclockwise until the screw is fully extended.
  4. Turn the pitman shaft adjuster screw (1) clockwise 1 full turn.
  5. Rotate the stub shaft (3) from stop to stop, using a 12-point socket while counting the number of turns.
  6. Starting at either stop, turn the stub shaft (3) back half of the total number of turns. This is the center of the gear.
    Object Number: 322006  Size: SH

  7. Ensure that the gear is centered by verifying the following items:
    The flat on the stub shaft (3) faces upward.
    The flat on the stub shaft (3) is parallel with the side cover (2).
  8. Align the master spline (5) on the pitman shaft (4) with the adjuster screw (1).
    Object Number: 322007  Size: SH

  9. Place a torque wrench on the stub shaft (2) with the handle in the vertical position.
  10. Rotate the stub shaft (2) 45 degrees from each side of the center of the stub shaft. The stub shaft (2) must rotate smoothly.
  11. Record the worm bearing preload measured on or near the center (1). The recorded bearing preload must be 0.7-1.7 N·m (6-15 lb in) with the worm and the ballnut installed. If the torque is outside of this range, readjust or repair the steering gear assembly as required.
  12. In order to obtain the correct preload torque, adjust the over-center torque by turning the pitman shaft adjuster screw clockwise.
  13. Add 0.7-1.1 N·m (6-10 lb in) torque to the previously measured worm bearing preload torque.

    Tighten
    Tighten the adjuster lock nut to 49 N·m (36 lb ft). Prevent the adjuster screw from turning while tightening the adjuster lock nut.

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics