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Old 05-17-2012, 09:35 AM   #1
zzz
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Transmission Fluid Problem?

HI, guys,
I got a Jeep wrangler 2008 and recently I found it's hard to shift to first or second gear. I need to use more force to do that. And also, when I press the clutch, I heard a sound like a "click".
I go to the mechanic and check the transmission fluid. It's full but there's no any transmission fluid changed on this jeep.
Is that a problem for my transmission or I just have to change transmission fluid to make "shifting" smoothly?
Sorry for my bad english and welcome for any reply.

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Old 05-17-2012, 10:33 AM   #2
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Is the shifting hard when the JK is cold? I find cooler mornings and first starting out that shifts are really stiff, but it loosens up as the JK warms up.

Also, have you checked your Brake fluid reservoir if it's low you may have a slave cylinder leak which may cause the harder shifting. If the brake fluid is low just check near your transmission bell-housing and if you notice any fluid leaking (clear/yellow) it is sign your slave cylinder or hose line will need replacing. We are lucky the slave cylinder is external on these units and not terribly expensive to change out.

If you have not changed your fluid best thing is you should with some synthetic synchromesh fluid like RP or Redline MTL which are compatible with Mopars synchromesh. I use Redline MTL and it smoothed out my shifting from the stock fluid.
Also, if you can change the fluid yourself it is a very, very simple job to do if you have the space! The only thing is you have to make a drain plug screw to fit between the exhaust cross-over and fit in the drain plug screw. All I took was a 17mm bolt and added 2 nuts and then took a grinder to have the bolt and nuts fit between the cross-over pipe and used a wrench to remove the drain plug. Then I purchased a fluid pump to fit on the Tranny fluid bottle to pump into the transmission.

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Old 05-21-2012, 10:32 PM   #3
zzz
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Thanks for the reply. I checked Brake fluid reservoir, it's almost full. Now the thing I can do is to change the transmission oil. But I'm a little bit worried. Because it's only hard to shift to the second gear no matter it's cold or warm up. And sometimes when I shift to the second gear, it's hard go into the position easily and would stuck at somewhere so I need to do a shift again.
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Old 05-22-2012, 02:54 PM   #4
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Quote:
Originally Posted by zzz View Post
Thanks for the reply. I checked Brake fluid reservoir, it's almost full. Now the thing I can do is to change the transmission oil. But I'm a little bit worried. Because it's only hard to shift to the second gear no matter it's cold or warm up. And sometimes when I shift to the second gear, it's hard go into the position easily and would stuck at somewhere so I need to do a shift again.
Well, just try new fluid and if it's still an issue, I would take it into the dealership if you still have powertrain warranty to help determine the issue. Also, I am wondering if you have a stiffer inner shift boot that is causing the issue of harder shifts??
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Old 05-30-2012, 06:27 PM   #5
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Thanks so much for the reply!!
I think I should take my jeep to some mechanic and have some inspection.
It just becomes pretty uncomfortable to shift from 1 to 2. The feeling is like there's some "sand and small rock" in the transmission and these make shifting not smoothly. I'm fear that it could be some problems for the gear inside the transmission, to rebuild that may cause a lot lot money.
And what is a "stiffer inner shift boot"? Is that a clutch's problem?
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Old 05-30-2012, 08:09 PM   #6
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No the inner shift boot is rubber boot shown in this picture with the 6spd. I know some of the older JK's had popping out issues and stiffer shifts with some of the inner rubber boots.

You can find it under the outer shift boot in in the cabin of the jeep.

However, by the sounds of things you may have some internal issues like the synchros. If you have Powertrain warranty let the dealership look at as it will be covered and should be 100% costs covered by Chrysler.

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