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bmmiller 07-20-2013 02:07 PM

Gears grind when downshifting
So my gears grind during downshifting. It started with 4th. Now 3rd is acting up too. I'm sure it's synchronizers. Is there anything I can do without rebuilding the transmission? Will changing the fluid help? I've heard of synchromesh. Would that be good to try also?

AllMudd 07-20-2013 02:13 PM

I've heard the same about synchromesh but I think yours maybe a little late.

bmmiller 07-20-2013 03:46 PM

So I guess I'm looking to rebuild the transmission?

AllMudd 07-20-2013 03:55 PM

You can try and change the oil, even if it is better i wouldn't think that it will last to much longer.

kik 07-20-2013 08:05 PM

Keep in mind that gear grinding like that also means that your clutch could be going bad.

bmmiller 07-20-2013 09:02 PM

True but I'm trying to rule that out considering I put in a new master and slave cylinder about 4,000 miles ago. I'm hoping it's not the clutch but transmission is way worse.

kik 07-21-2013 06:32 AM

If you have over 50,000 on the clutch I would start there.

cakes567 07-21-2013 07:41 AM

Regardless if its the clutch or trans you will still have to drop your trans anyways. So if its nit the clutch then you mine as well replace it to. No Sence in dropping the Trans more more then once.

bmmiller 07-21-2013 08:26 AM

I have never fooled with the clutch. Is that completely different from master and slave cylinder?

OregonPlinker 07-21-2013 10:22 AM


bmmiller 07-21-2013 01:02 PM

Before I go tearing into my transmission is there anyway to determine the issue is the clutch vs. the synchronizers?

AllMudd 07-21-2013 02:13 PM

I would say if it only happens in 2 of 3 forward gears its probably the trans. The clutch going bad usually it will happen in all gears.

bmmiller 07-21-2013 02:27 PM

Well due to further inspection I have concluded that one problem, and hopefully the only problem, is the throw out bearing. Has anyone ever tackled this problem?

AllMudd 07-21-2013 02:36 PM


Originally Posted by bmmiller (Post 3987135)
Well due to further inspection I have concluded that one problem, and hopefully the only problem, is the throw out bearing. Has anyone ever tackled this problem?

Yes. If this is bad and has worn into the pressure plate your in for a new clutch. Like said before there is no reason to replace 1 of the 4 parts to a clutch. Your already there replace it all IMHO.

bmmiller 07-21-2013 02:44 PM

So I'm guessing replacing the clutch will take care of the whole problem? I've never tackled this before but I'm up for the challenge plus I can't afford to pay a shop thousands of dollars when I'm capable. I'm just trying to figure out how it all ties in to make sure I go in with as much knowledge as possible, so I appreciate all your help.

AllMudd 07-21-2013 03:09 PM

The clutch works opposite as you might think. You have the flywheel that spins while the engine runs but that's it. The pressure plate bolts to the flywheel and releases and applies the clutch ( with you pushing or releasing the pedal). And the clutch plate that's between the flywheel and pressure plate. The clutch plate has splines on it that the trans input shaft aligns with. When you start it up all components turn constantly until you push in the pedal. This pushes on the pressure plate fingers but then removes the pressure that pushes the clutch plate and contacts it to the flywheel allowing you to shift. I hope this is easy to understand I tried looking for stuff on the net and haven't found it yet. If I do I'll post it.

bmmiller 07-21-2013 03:42 PM

All mud I appreciate it but I'm starting to talk myself out of tackling this thing. I'm real close just making this fix and selling. This first jeep experience has been a very bad one

bmmiller 07-21-2013 03:43 PM

You have been extremely helpful. If you run across any additional info please post.

kik 07-21-2013 06:12 PM

Now that it's pretty much narrowed down to the clutch, if you get a clutch "kit" it will have the components that you need as Mudd said. You might want to consider a new flywheel or, bring the original to a shop and see if it can be re-surfaced this way all of the components will be set. Good luck.

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