Rough shifting

Tiny
LIMA4.SPECTER
  • MEMBER
  • JEEP LIBERTY
In the past few weeks, Ive noticed that my 2002 Liberty Sport 2wd transmission has been a little rough and that it jerks slightly when I shift from park to drive and then back. Sometimes it seems that its a little sluggish in its get up and go. Not so much the engine itself but the transmission. That particular part comes and goes. About two months ago, I noticed that it was only slightly low on fluid so I figured at 60K miles, it wouldnt hurt to add a little Lucas tranny fluid additive to it. Could this be creating the problem? Ive checked my u-joints and they seem to be good and tight as there is no slack when I try to twist the shaft. Im thinking of changing the filter, refilling the tranny and changing the diff fluid. Would this be a good start to see what becomes of it? Please advise.
Friday, May 4th, 2007 AT 9:15 PM

4 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
How does the fluid look? Any burnt or brownish appearance? A fluid and filter change can't hurt at 60,000 mi. No codes stored by the PCM?
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Sunday, May 6th, 2007 AT 6:32 AM
Tiny
LIMA4.SPECTER
  • MEMBER
  • 3 POSTS
The fluid appears ok. I was told by a quicklube place here in town that it was done around 45-50K according to their records but I dont like to take chances. Gotta love us Marines.
I plan to drain it, check the pan for debris, etc in the near future. If nothing else that will give me some peace of mind in that regard.
The only code that I get is a small EVAP leak. I think it came from someone not tightening down my gas cap all the way. Its popped up several times. But there have been two or three other people that have used it since so I cant rule out that they didnt tighten it down. Now that its only me driving again, I'll have it erased and make sure that its not something else. Does that make you think of anything else besides the cap? (Cant remember the exact number of the code. Wanna say that its a 0700 code but cant exactly remember)
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Sunday, May 6th, 2007 AT 4:15 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Evap leak should be fixed first can cause drivability issues! System is tested with a smoke pump to find leaks.
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Monday, May 7th, 2007 AT 3:08 PM
Tiny
LIMA4.SPECTER
  • MEMBER
  • 3 POSTS
Ive finally been able to pull two codes from my computer. They are P0442 and P0455. The first is the small evap system leak. The other is a gross evap leak. Can either of these two contribute to the rough shifting problem? What do they mean exactly?
Thanks!
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Saturday, May 19th, 2007 AT 2:14 PM

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