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Old 06-30-2011, 07:40 PM   #1
Join Date: Jun 2011
Location: Key West, Fl
Posts: 4
Transmission problem??

I've got an '01 Wrangler with an automatic transmission. When I first run it in the morning or when I first run it any time it slips from 1st into neutral and then engages again. It does this a few times. Once it shifts to 2nd there is no problem. And it only happens for the first acceleration and doesn't happen again all day. What's up? Any help is appreciated

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Old 06-30-2011, 07:49 PM   #2
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Join Date: May 2011
Location: Lakeland FL and Hooversville PA
Posts: 2,198
Fluid fresh and the correct level? Has to be checked hot, after run through the gears, then placed in neutral to do so.

Did you adjust the bands when you changed the fluid?

Also you could have a back flow prevent valve going bad and it's letting the fluid leak back, so it takes a bit for the pump to get the fluid going to the low/reverse clutch pack.
By the time it shifts to second the fluid is back up to where it needs to be.

97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.
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Old 07-03-2011, 06:37 AM   #3
Join Date: Jun 2011
Location: Key West, Fl
Posts: 4
Where is the back flow prevent valve?
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Old 10-02-2011, 09:33 PM   #4
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Join Date: May 2011
Location: Fort Worth, TX
Posts: 22
Mine does this same thing in the mornings. Fluid level is good. Next step is to change it i guess. How hard is it to change? Ill look for a write up.
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Old 10-02-2011, 09:46 PM   #5
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Join Date: Nov 2010
Location: Burlington WI
Posts: 1,187
I have owned mine for 10 months. When I put it in reverse it is slow to move for about 2 seconds and then is fine. If I drive it every day it does not do this. Sounds like my "back flow prevent valve" would be going too. It is up on fluid and shifts fine. Just sluggish to move on a cold start. What can be done?
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