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Unread 04-02-2012, 05:51 AM   #1
Hamid
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Slipping 1st gear AW4

When cold with the lever on D, my 2000 Cherokee drives for few seconds in the 1st gear then disengages, with a little acceleration it re-engages and shifts up normally.
It works fine in all speed ranges and normal acceleration.
The problem is at low speeds when trying to accelerate it slips few seconds just when I press on the pad, then re-engages in a high RPM but with a bang you don't like to feel, it may break a gear in the tranny after so many times.

On a steep hill or incline, it slips badly, looks like the oil doesn't reach some parts of the gearbox or the valve body even the level is OK.

I guess it is the #1 solenoid not working well, need your help in this issue, any comments will be greatly appreciated, .thanks.

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Unread 04-02-2012, 07:17 AM   #2
VBRubicon
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Fluid level is good? If it is I would drop the pan and change the filter. Start with the simple things.
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Unread 04-03-2012, 12:10 AM   #3
Hamid
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Good idea VBRubicon, but I changed the fluid with the filter at 102.5K miles 27Nov2010 (Mopar AFT +4), current mileage 123K. Next oil change at 132K.
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Unread 04-03-2012, 04:22 AM   #4
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Quote:
Originally Posted by Hamid View Post
Good idea VBRubicon, but I changed the fluid with the filter at 102.5K miles 27Nov2010 (Mopar AFT +4), current mileage 123K. Next oil change at 132K.
ATF+4 is not the recommended fluid FWIW.

Not saying that's the problem. Did you have the problem before the last fluid change?
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Unread 04-03-2012, 09:09 AM   #5
Hamid
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Yes, and what is the correct fluid you recommend. Thanks.
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Unread 04-03-2012, 04:19 PM   #6
cruiser54
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Dexron III/Mercon.
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Unread 04-04-2012, 12:25 AM   #7
Hamid
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The owner manual says DexronII !!!!
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Unread 04-04-2012, 05:11 AM   #8
cruiser54
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They don't make it anymore and it's superceded by III.
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Unread 04-04-2012, 06:27 AM   #9
Hamid
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I will see if this type fluid is available around, is there an alternative?. Thanks.
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Unread 06-13-2013, 09:21 PM   #10
Hamid
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I finally have tow choices after reading and searching all about AW4 slipping in 1st gear:
1- replace all 3 solenoids at the valve body. cost $109 for parts and I will do the work.
2- overhaul the tranny. cost $922

I wish someone can guide me to the correct decision. Thanks.
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