yo; here is a gear box troubleshooting list:
Front End Wander - Front end wander is a condition that is noticed when the vehicle is driven in a straight ahead position with the wheel held in a firm position, but the vehicle wanders to either the right or left side. Front end alignment should be checked before any gear service is made.
NOTE: Front end alignment and tire pressures should be checked before any gear service is performed.
Possible Source(s):
* Gear box loose on frame.
Action(s) to Take:
* Check mounting bolts for damage and replace if required. If no damage is found, tighten bolts to 73-90 N-m (54-66 ft-lb).
Possible Source(s):
* Incorrect meshload.
Action(s) to Take:
Set meshload to specification.
Possible Source(s):
* Loose race locknut.
Action(s) to Take:
* Check race locknut for damage and replace as required. If no damage is found, tighten nut to 75-122 N-m (55-90 ft-lb).
Possible Source(s):
* Insufficient worm ****** bearing preload.
Action(s) to Take:
* Replace valve assembly.
Possible Source(s):
* Damaged sector shaft bearing (gear might also exhibit external leakage from sector seals).
Action(s) to Take:
* Replace gear housing assembly.
Possible Source(s):
* Center lash.
Action(s) to Take:
* Improper fit of worm to piston. Replace valve assembly (be certain to check meshload prior to replacing valve for center lash).
Other Conditions:
- Heavy Steering Efforts, Poor assist (both directions)
Possible Source(s):
* Low steering system fluid fill.
Action(s) to Take:
* Add steering fluid to proper level.
Possible Source(s):
* Engine idle too low.
Action(s) to Take:
* Set engine idle to specification.
Possible Source(s):
* Low power steering pump belt tension.
Action(s) to Take:
* Check belt tension and set to specification.
Possible Source(s):
* Pump flow/relief pressure not to specification.
Action(s) to Take:
* Test pump and service as necessary.
Possible Source(s):
* External leakage resulting in low fluid level.
Action(s) to Take:
* Refer to Ford Power Steering Gear Leak Inspection for external leak diagnosis.
Possible Source(s):
* Piston Teflon