97 Jeep Wagoneer Automatic Trans refusing to shift on some start ups - JeepForum.com
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Unread 07-20-2014, 10:55 AM   #1
JTob90
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1987 FSJ Wagoneer 
 
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97 Jeep Wagoneer Automatic Trans refusing to shift on some start ups

Just like the title says I have a 1987 Jeep Wagoneer that i recently purchased and every once in awhile I fire it up, get going and it wont shift up. I'll get to about 25 mph before it'll stop accelerating. If I pull over shut it off and restart it back up, sometimes that will resolve the problem and it'll shift just fine. If I start it up and its shifting normal then its good the whole ride but like i said every once in awhile it'll slip and won't shift up passed 1st gear. What could be causing this problem on an 87? What would be the easiest things for me to check first and then go from there. Its not a problem if i stay away from main roads till I know if its shifting or not but that's kind of starting to be an inconvenience in itself. Any help is greatly appreciated. I know engines but this 1987 Jeep Wagoneer is far beyond me so please no snide or rude remarks Just helpful suggestions.

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Unread 07-20-2014, 10:20 PM   #2
super98lsc
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An 87 should be the AMC 360V8 and 727 Torqueflight automatic. Check the throttle valve linkage adjustment. You should be able to find this procedure online. It's the solid rod type linkage on the carb that goes to the back of the engine and down to the driver side of the trans. If this isn't set properly the trans won't shift correctly and will also fail. Also check basics like fluid levels etx
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Unread 07-20-2014, 11:05 PM   #3
carnuck
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The '87 isn't a limited with 4 headlights by any chance? That would be 4.0L with AW4 and clogged filter.
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Unread 07-21-2014, 01:30 AM   #4
gpcl16
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To the OP: Do you have an '87 Wagoneer or an '87 Grand Wagoneer? Two completely different vehicles.

And if the problem is intermittent as he described, I doubt that the throttle position linkage would be the problem. That would cause it to function improperly at all times. I would start by checking the level and condition of the fluid. The filter/fluid could be clogging and not allowing proper flow until the trans warms up a bit and builds some pressure to clear up the passages in the valve body. Very common on older transmissions. I had a '63 Ford (Cruise-O-Matic) that would always take longer for the first upshift when cold, then work perfectly after that.
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Unread 07-21-2014, 06:09 AM   #5
super98lsc
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The linkage adjuster can be loose or hanging up intermittently. If it hangs open then the up shift will be very late or nearly non existent. Carnuk made a good point is this a full size jeep or the baby cherokee model with the 4.0?
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===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
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Unread 07-21-2014, 12:02 PM   #6
Dngrs1
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His profile states it has a 4.0L so I'm guessing a 'baby Wagoneer'.
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Unread 07-21-2014, 04:33 PM   #7
super98lsc
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Then he should follow Carnuks advice. It's the aw4.
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77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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Unread 07-22-2014, 06:18 AM   #8
GCX2450
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I will second most of the opinions here.

1. What is your truck?
2. Is your transmission fluid level correct?
3. Is the trans/throttle linkage secure and in adjustment?
4. When was the last time your fluid and filter were changed?

If you do not know on #4 I would recommend you change the fluid and filter and perform the band adjustments(1 while pan is down) and kickdown adjustment.
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Unread 07-22-2014, 01:32 PM   #9
carnuck
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Don't just go by the look of the AW4 filter as well. Mine looked fine (although the fluid was totally cooked because the fluid cooler in my new ChiCom 3 row brass rad was clogged solid from the factory with sealer. My bad for not checking before hooking up, but it was brand new, ya know?) When I dropped it, I found a LOT of solids in the screen in the closed end, so the fluid change I did wasn't much help until a new filter was put in and I added a bottle of Lubeguard for Dexron fluid.
Redid with new filter and it worked fine until the same brand new rad blew the trans cooler and filled the trans with antifreeze. Good thing I have another trans to put in!

What does this have to do with full size rigs? The OP should post his Wagoneer Limited questions in the Cherokee section, BUT since some FSJ guys want "fuel economy" (like me) 4.0L with AW4 swap works with lower gears for freeway and offroad. After the bridge to where my cabin is opens (later this month. The road was blocked by a slide we weren't allowed to move after what happened to Oso) I will post the swap I did on my '84 J10. Mind you, I'm going LPG for fuel so I won't have everything that a gasoline setup would,
aside from the Hydroboost brakes (which is needed to clear the 4.0L intake)
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