1. Shift Linkage: This is the most common culprit. The linkage connects the shifter to the transmission. Loose or worn components within this linkage can result in a sloppy feel.
* Check for broken or loose linkage components: Inspect the linkage rods, bushings, and the connection points at the transmission and shifter. Look for any signs of wear, breakage, or looseness. You may need to get under the vehicle to inspect the linkage thoroughly.
* Tighten loose bolts: If you find any loose bolts connecting the linkage components, tighten them securely.
* Replace worn or broken parts: If you find worn bushings or broken linkage components, they'll need replacement. You can typically find these parts at auto parts stores.
2. Shifter Cable (if applicable): Some transmissions use cables instead of rods for shifting. These cables can stretch or become frayed, leading to a loose shifter.
* Inspect the cables: Check for fraying, stretching, or kinks in the cables.
* Adjust or replace cables: If the cables are stretched or damaged, they may need adjustment or replacement.
3. Shift Lever Bushings: The shifter lever itself sits in bushings within the console. Worn bushings can allow excessive play.
* Inspect the bushings: This might require removing the shifter assembly (a more involved process) to inspect the bushings.
* Replace worn bushings: If the bushings are worn, they'll need replacing.
4. Transmission Mount(s): A worn or broken transmission mount can allow the transmission to move excessively, contributing to a loose feeling in the shifter.
* Inspect the transmission mounts: Check for cracks, tears, or excessive movement in the mounts.
* Replace worn mounts: Worn transmission mounts should be replaced.
5. Internal Transmission Issues (Less Likely): While less likely to directly cause a loose shifter, severe internal transmission problems *could* indirectly contribute to a strange feel. This is usually accompanied by other transmission problems (e.g., difficulty shifting, slipping gears, noises).
Troubleshooting Steps:
1. Start with the simplest checks: Begin by visually inspecting the linkage under the vehicle and tightening any loose bolts you find.
2. Check for play in the shifter: Try moving the shifter back and forth – excessive movement indicates a problem.
3. Consult a repair manual: A repair manual specific to your 1998 Ford Expedition will provide detailed diagrams and instructions for inspecting and repairing the shift linkage.
4. Seek professional help: If you're not comfortable working on your vehicle yourself, take it to a qualified mechanic for diagnosis and repair.
Important Safety Note: Before working under your vehicle, ensure it's properly secured on jack stands and chocked. Never work under a vehicle supported only by a jack.
Remember to always consult a repair manual specific to your vehicle year and model for precise details and diagrams. Improper repairs can lead to further damage or safety hazards.