* Reverse gear's internal condition: While less likely than the other issues, wear and damage to the reverse gear within the transmission could make it difficult to engage. This is usually accompanied by other shifting problems.
* Shift linkage: This is the most common and likely culprit. The linkage connects the gear selector lever to the transmission. Over time, this linkage can wear out, bend, become loose, or accumulate corrosion. This would directly affect the lever's ability to fully engage reverse. The jumping out could be due to a worn bushing or loose connection.
* Transmission fluid level and condition: Low or dirty transmission fluid can cause shifting problems. The fluid lubricates and cushions the components. Low fluid increases friction, making shifting difficult. Contaminated fluid can lead to sticking, binding and erratic behaviour.
* Reverse-specific switch or solenoid (if equipped): Some transmissions use electrical components to manage reverse gear engagement. A faulty switch or solenoid could prevent the transmission from fully engaging reverse, or cause it to disengage prematurely. This is more likely on electronically controlled transmissions.
* Improper adjustment of the linkage: The linkage might be simply out of adjustment, preventing it from fully engaging reverse.
Why it's probably NOT a major transmission internal failure (initially): Major internal transmission problems typically manifest with a wider range of issues, such as:
* Difficulty shifting into *all* gears.
* Slipping gears.
* Grinding noises during shifting.
* Complete inability to shift into certain gears.
* Transmission fluid leaks.
What to do:
1. Check the transmission fluid: This is the first and easiest step. Check the level and condition of the fluid. If it's low, add the correct type (consult your owner's manual). If it's dark, burnt, or smells bad, a fluid change is necessary.
2. Inspect the shift linkage: Examine the linkage visually for any signs of damage, wear, looseness, or bending. Pay close attention to the points where the linkage connects to the transmission and the gear selector lever.
3. Try adjusting the linkage (if possible): Some linkage systems have adjustment points. Consult your repair manual for proper adjustment procedure. Caution: incorrect adjustment can worsen the problem.
4. Professional diagnosis: If the above steps don't resolve the issue, a qualified mechanic needs to diagnose the problem. They have the tools and expertise to properly inspect the transmission and linkage system.
It's crucial to address this problem promptly. Driving with a transmission that slips out of gear can be dangerous. Start with the simpler checks and progressively seek professional assistance if needed.
