Question About Release Bearing/Gearbox, Please Help...
ShaolinMassa
08-11-2006, 09:08 AM
Good morning guys, I have a question about my car. It's a 2000 Mitsubishi Mirage. I started having problems with it a couple weeks back when it started popping out of third gear. After that other gears started acting up. Sometimes it would pop out of a gear, but the main problem after that was that I could not get the vehicle to shift into most of the gears. I could get it into first and second most times, but the other gears I can no longer shift into those gears at all (not because it pops out of gear, it just wont go into the gear).
I have had several different opinions about what is wrong. Two people have told me it was the release/throwout bearing. The car was making a rattling type sound and when they pressed the clutch it stopped the rattling and so they said it's the bearing. A different mechanic said it's the gearbox, because the car wouldn't pop out of gear if it wasn't the gearbox and that the bearing only needs to be oiled and it may have gotten wet, that's why it's rattling.
Based on this info, what do you guys think is the problem? None of these people have actually taken out the gearbox because of the work involved, but they all are sure that they are right, can you guys tell me what you think. Thanks...
I have had several different opinions about what is wrong. Two people have told me it was the release/throwout bearing. The car was making a rattling type sound and when they pressed the clutch it stopped the rattling and so they said it's the bearing. A different mechanic said it's the gearbox, because the car wouldn't pop out of gear if it wasn't the gearbox and that the bearing only needs to be oiled and it may have gotten wet, that's why it's rattling.
Based on this info, what do you guys think is the problem? None of these people have actually taken out the gearbox because of the work involved, but they all are sure that they are right, can you guys tell me what you think. Thanks...
CraigFL
08-11-2006, 01:38 PM
It's my experience that cars that pop out of gear may not always be fully in gear. The first thing you need to do is to see if it goes into gear completely while the engine is stopped. If it doesn't, you may just need an adjustment of the shift linkage/cable. In any case, the rattle that stops when you press the clutch doesn't sound good. If you find that you can shift easily and completely into gear when the engine is off, and you can't when it's idling, then the clutch is probably not releasing.
ShaolinMassa
08-11-2006, 05:00 PM
It doesn't go into the gears when the car is off either. All the gears that won't go in gear while the car is on, won't go when the car is off either. The one that pops would go into gear at times with a lot of work to get it in there, but it will still pop out when the car is driving. Do you think it could be a combination of things, the shift link cabke causing the popping and the release bearing causing it not to go into gears? Does it sound like the gearbox? Thanks for the reply...
Moppie
08-11-2006, 07:40 PM
Its not a clutch problem, which is what the release bearing is part of.
Its clearly either a problem with the external linkage, which soul be easy to find by getting under the car and having a look around.
Or, its an internal problem with the shift mechanism in the gear box.
If its the former its just a matter of finding it and fixing it, any competent mechanic should be able to. Infact any compenetent mechanic would have found it was a problem with the linkage/shift mechanism pretty quickly.
If its internal then IMO it would be cheaper and easier just to replace the whole box.
Often you can fix the problem, but find out a week later its caused other problems else where in the box. i.e. worn or bent shifter fork, worn syncros, etc.
Its clearly either a problem with the external linkage, which soul be easy to find by getting under the car and having a look around.
Or, its an internal problem with the shift mechanism in the gear box.
If its the former its just a matter of finding it and fixing it, any competent mechanic should be able to. Infact any compenetent mechanic would have found it was a problem with the linkage/shift mechanism pretty quickly.
If its internal then IMO it would be cheaper and easier just to replace the whole box.
Often you can fix the problem, but find out a week later its caused other problems else where in the box. i.e. worn or bent shifter fork, worn syncros, etc.
Black Lotus
08-13-2006, 05:53 PM
Her's my two cents-----
The input shaft (first motion shaft) bearing sounds like its gone south. It pops, or popped put of gear because the shaft is moving around. Now the shift forks are bent, or something else is damaged internally causing you to not engage the first two gears.
-----I must be lucky, the last three manual trans. cars I've owned have lost the input shaft bearing.
The input shaft (first motion shaft) bearing sounds like its gone south. It pops, or popped put of gear because the shaft is moving around. Now the shift forks are bent, or something else is damaged internally causing you to not engage the first two gears.
-----I must be lucky, the last three manual trans. cars I've owned have lost the input shaft bearing.
Moppie
08-13-2006, 06:51 PM
A worn gearbox bearing is going to make one hell of a lot noise though, surly enough to tell you to stop driving long before it collapses and does any more damage.
-----I must be lucky, the last three manual trans. cars I've owned have lost the input shaft bearing.
That might be saying something about your driving style!
I hope one of them wasn't the renult box?
-----I must be lucky, the last three manual trans. cars I've owned have lost the input shaft bearing.
That might be saying something about your driving style!
I hope one of them wasn't the renult box?
Black Lotus
08-14-2006, 09:28 PM
A worn gearbox bearing is going to make one hell of a lot noise though, surly enough to tell you to stop driving long before it collapses and does any more damage.
That might be saying something about your driving style!
I hope one of them wasn't the renult box?
Yup.
The noise wasn't very noticable at all on the Renault box--a UN-1-016. No noise at idle, in this case. Never had it pop out of gear either if I shifted it correctly.
The failure which stopped the whole show was the splines stripping out of the clutch shaft where it joins to the first motion shaft.
The really annoying aspect of all this was the first motion shaft bearing going away and dropping bearing debris from that bearing down onto the inner race of the output shaft (2nd motion shaft) and ruining that. So I had to replace the 2nd motion shaft/ring and pinion assy. While I was in there, I put a Quaife LSD in and some other assorted bits, so it all wasn't a total loss.
I think I drive cars with a reasonable amount of common sense. What balances that out is that I invariably buy cars with weak gearboxes, then modify the engines! ;)
That might be saying something about your driving style!
I hope one of them wasn't the renult box?
Yup.
The noise wasn't very noticable at all on the Renault box--a UN-1-016. No noise at idle, in this case. Never had it pop out of gear either if I shifted it correctly.
The failure which stopped the whole show was the splines stripping out of the clutch shaft where it joins to the first motion shaft.
The really annoying aspect of all this was the first motion shaft bearing going away and dropping bearing debris from that bearing down onto the inner race of the output shaft (2nd motion shaft) and ruining that. So I had to replace the 2nd motion shaft/ring and pinion assy. While I was in there, I put a Quaife LSD in and some other assorted bits, so it all wasn't a total loss.
I think I drive cars with a reasonable amount of common sense. What balances that out is that I invariably buy cars with weak gearboxes, then modify the engines! ;)
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