1987 yj 4.2 shifting problem - JeepForum.com
 
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post #1 of 13 Old 07-15-2013, 07:17 PM Thread Starter
smalls1994
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1987 yj 4.2 shifting problem

I I've had this jeep for a couple months now and I've had this problem come up where after its been driving for a while the clutch won't disengage fully not letting it go into gear or making it very difficult. You can feel it in the pedal as well. I read that I could change the fluid to dot 4 and bleed the line. I'm not sure. I'm also concerned that maybe the tuber hose on the line may be old and expanding while hot. If anyone can help. It would be greatly appreciated. The problem does go away if I let it sit for a couple hours

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post #2 of 13 Old 07-19-2013, 06:41 AM
cruiser54
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How's the fluid level in the clutch master cylinder? Does it drop? Any leaks inside the cab where the clutch pedall goes into the clutch master cylinder? Any fluid leaks from the front of the bell housing?

If you own a Renix Jeep, you'll want to check this out.

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post #3 of 13 Old 07-19-2013, 07:09 AM
vadslram
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It works fine cold and doesn't hot?
You mean after running or just temperature.

Look at the connection hoses, if they look old and the jacket is cracking it could be the hoses are expanding.
If they look OK and/or you notice it more after pushing the pedal a few times like normal driving then you could be getting air in the system from the master cylinder.flush out the system, bleed it thouroughly and make sure there is plenty in the resevior so it doesn't splash around and get air foaming up.
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post #4 of 13 Old 07-19-2013, 08:20 AM Thread Starter
smalls1994
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Fluid level is full. It was a little low the fist time I checked it but it hasn't moved since then. I have a slow oil leak that comes from the bell housing so I can't tell if any is coming through there. Before the problem happend after driving for a while but now it's constant. It seams like when you put the clutch all the way down its only disengaging 3/4 of the way
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post #5 of 13 Old 07-19-2013, 02:48 PM Thread Starter
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You can feel that there's not as much throw with the clutch pedal. Could that be the master cylinder???
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post #6 of 13 Old 07-19-2013, 02:50 PM
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Quote:
Originally Posted by smalls1994 View Post
You can feel that there's not as much throw with the clutch pedal. Could that be the master cylinder???
Yes.

If you own a Renix Jeep, you'll want to check this out.

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post #7 of 13 Old 07-19-2013, 04:44 PM Thread Starter
smalls1994
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So should I try that first before pulling the trans. Also I cant get the bleeder open. And suggestions for that!?!?
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post #8 of 13 Old 07-19-2013, 09:10 PM Thread Starter
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Ok I got the bleeder open and there was no air in the line and there's no difference in the clutch. The fluid was pretty dirty tho
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post #9 of 13 Old 07-19-2013, 09:40 PM
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Bleed the system first.

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

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post #10 of 13 Old 07-20-2013, 09:18 AM Thread Starter
smalls1994
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Quote:
Originally Posted by cruiser54
Bleed the system first.
I did and there was no difference
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post #11 of 13 Old 07-20-2013, 09:20 AM Thread Starter
smalls1994
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I did and there was no difference
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post #12 of 13 Old 07-22-2013, 05:26 AM
vadslram
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Don't just bleed, do a full flush. Keep bleeding until the fluid comes out clean. It is a cheap test anyway and pushing all the nice clean fluid through the system could degunk some of the seals and / or flush out some air bubbles that are being coy.
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post #13 of 13 Old 07-22-2013, 01:58 PM Thread Starter
smalls1994
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Alright I will try that later and get back to you. Thanks for all the help btw
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