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Unread 04-02-2013, 04:09 AM   #1
Little Green
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1991 FSJ Wagoneer 
 
Join Date: Nov 2007
Location: Havertown, PA
Posts: 930
Intermittent transmission problems

Hey crew,
Sometimes within 5-10 minutes of starting the waggy I come to a complete stop(stoplight, stop sign etc) and the truck will not go forward. Sometimes if you give it gas it will suddenly "catch" and go or you slide it back to neutral and back to drive and it goes no problem. Sometimes it does not do it at all or does it once and no more problems or it will do it 2 or three times. It seems like after about 10 minutes or so I don't tend to have issues.
It does not feel like it's slipping at all. Just give it gas and nothing, like it's not in gear. Any ideas?

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Unread 04-02-2013, 04:16 AM   #2
RockRollin
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1990 FSJ Wagoneer 
 
Join Date: Apr 2012
Location: Grand Haven Mi, USA
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If fluid level is right, then I would go after filter change.
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Unread 04-02-2013, 07:38 AM   #3
olliehopnoodle
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Yep, what he said. And soon.
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Unread 04-02-2013, 10:03 AM   #4
super98lsc
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1999 WJ 
 
Join Date: May 2006
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Drop pan drain fluid, rinse down the valve body with brake cleaner and replace the filter. Honestly this sounds like worn seals internally which is causing the rear clutch to not have enough pressure to stay engaged from an idle. Check the trans cooler lines, hoses, and flush out the cooler as well. Any restriction there can also cause this. Does it do the same thing in manual 1 ? If it does not do this in manual 1 then likely the overrun clutch which is used to holds the low reverse drum stationary when in Drive mode. Placing the lever in Manual 1 forces the Low/Reverse band to engage and hold the drum so if the overrun clutch isnt holding the problem will go away when placed in Manual 1. If it does this in both modes Drive/Man 1 then likely the rear clutch is worn or not receiving enough pressure to hold proper engagement at idle. Front pump could be worn, general worn seals in the trans etc. Providing the pump is coming up to pressure the trans may last a while longer if your easy on the go pedal. This is of course assuming were speaking 727 here.
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